Name: Lithium battery electrolyte(KLD-TF16)（1.0M LiTFSI in EC:EMC:DMC=1:1:1 vol%）
Brand: Canrud
Price: 90.61 USD

Question 1

Accepted Answer

The recommended electrolytes for PMMA-based gel polymer electrolytes are:

👉1.0M LiPFⅨ or LiTFSI is dissolved in mixed solvents such as EC/PC, EC/DMC, EC/EMC, etc., and the volume ratio is usually 3:7 or 1:1.

For example:
-1M LiPF₆ in EC:EMC = 3:7 (vol%)
-1M LiClO₄ in EC:PC = 1:1
-1M LiTFSI in EC:DMC = 1:1

This type of electrolyte has good compatibility with PMMA and can effectively swell to form a gel with high ionic conductivity (up to 10? S/cm), which is suitable for lithium-ion battery systems. This recommendation is based on experimental data and material interaction mechanisms in the literature.

Question 2

Accepted Answer

The total concentration of lithium ions in the electrolyte (KLD-S13) of the lithium-sulfur battery was 1.1 M.

Question 3

Accepted Answer

The concentration of lithium electrolyte (KLD-LP17) 1.0M LiPF6 in EC:EMC = 3:7 vol% is 1.0 mol/l (1.0M). This means 1.0 moles of LiPF6 per liter of electrolyte.

Question 4

Accepted Answer

No, lithium electrolyte (KLD-LP40) is not an aqueous electrolyte. According to its formula "1.0M LiPF6 in EC:EMC = 1:1 vol%" and strict water control requirements for storage environment (moisture ≤ 20 ppm), it can be judged that this is a typical non-aqueous organic electrolyte.

Question 5

Accepted Answer

Goods, support direct purchase or custom packaging.

Question 6

Accepted Answer

We have this electrolyte, its product code is: MA-EN-ET-0093.

The product information is as follows:
-Name: Lithium Electrolyte (KLD-LP181)
-Formula: 1.0M LiPF in EC:DMC = 1:1 (vol%) with 2.0% VC
-Specifications: 50g, 100g, 250g, 500g, 1000g
-Inventory: in stock (999)
-Storage conditions: to be stored in a glove box with moisture <5ppm, temperature <24°C

This code corresponds to the exact formula you are querying.

Question 7

Accepted Answer

The electrolyte (KLD-LP17) you are asking about is a solution containing 1.0 mol/L of LiPFthat has a molar mass of about 151.9g/mol.

Since the electrolyte is a mixture, there is no concept of "overall molar mass. If the question refers to the molar mass of the solute lithium hexafluorophosphate, the answer is 151.9g/mol.

Question 8

Accepted Answer

Yes, we provide the electrolyte. The product name is "lithium battery electrolyte (KLD-LP02)", the model is MA-EN-ET-0090, and the composition is 1.0M LiPF6 in EC:DMC = 1:1 (vol%) + 2% VC, which is exactly the same as your requirements. Existing 50g to 1000g a variety of specifications, sufficient inventory, can be shipped at any time.

Question 9

Accepted Answer

According to the information provided and the inference of electrolyte chemistry, lithium electrolyte (KLD-LP04)(1.0M LiPF6 in EC:DMC:EMC = 1:1:1 vol%) is not resistant to 4.9V high voltage. This is a standard base electrolyte for lithium-ion batteries of conventional voltage. Under the high voltage of 4.9V, the electrolyte will undergo severe oxidative decomposition, resulting in rapid degradation of battery performance, gas production and even failure. If you need to support 4.9V, you must use a special high-voltage electrolyte.

Question 10

Accepted Answer

The solvent system used in the lithium cobalt oxide electrolyte (KLD-1376) is an ester, specifically a carbonate organic solvent (such as EC, DMC, EMC, etc.), so it can be determined that the electrolyte is an ester-based electrolyte.

Question 11

Accepted Answer

According to the knowledge base content, we can find some electrolyte formulations that can be used directly. For example, there is a simple formula in the electrolyte of lithium-sulfur batteries: 1.0M LiTFSI in DME:DOL = 1:1 Vol%. This electrolyte can be used directly and has good performance.

In addition, there is an electrolyte (KLD-1376) suitable for lithium-cobalt system, which can be directly applied to soft-pack batteries, with good low-temperature discharge performance and excellent cycle performance.

Summary: The simplest electrolyte includes 1.0M LiTFSI in DME:DOL = 1:1 vol% lithium-sulfur battery electrolyte and electrolyte (KLD-1376) suitable for lithium-cobalt system. These electrolytes can be used directly without further treatment. It should be noted that this is only an inference, and the specific application also needs to be selected according to actual needs.

Question 12

Accepted Answer

Yes, we have this electrolyte. The product name is "lithium battery electrolyte (KLD-LP181)", the model is MA-EN-ET-0093, the composition is 1.0M LiPFis dissolved in EC:DMC = 1:1 (vol%) solvent, and contains 2.0 VC additive, which is completely consistent with the formula you inquired about. Available in a variety of specifications from 50g to 1000g, currently available in stock and need to be stored in a dry environment (such as a glove box).

Question 13

Accepted Answer

According to the information provided by the knowledge base, there is no direct evidence that lithium sulfur electrolyte (KLD-S03) has a toxic or irritating odor. However, in order to ensure safety, it is recommended to refer to the product safety data sheet (SDS) or contact the supplier for more accurate information.

Question 14

Accepted Answer

Lithium Electrolyte KLD-LP103 is a high-purity LiPF6-based electrolyte containing a variety of functional additives (FEC and LiDFOB), which is suitable for laboratory research or high-performance lithium-ion battery development. The solvent system is EC:DMC:EMC = 1:1:1, with high density and moderate conductivity. Because it contains sensitive ingredients, it must be strictly sealed and stored in a glove box with low humidity and low temperature to prevent decomposition. Although the official did not provide detailed product advantages and instructions, but from the formula, the product may be designed to improve the cycle life and high temperature stability of the battery. Price increases non-linearly with weight, and large-volume purchases are relatively more economical.

Question 15

Accepted Answer

The recommended voltage range for lithium electrolyte (KLD-LP02)(1.0M LiPF6 in EC:DEC = 1:1 vol% with 5.0%FEC) is 2.5-4.3V vs. Li˙/Li.
The electrolyte is based on a conventional carbonate solvent system and is suitable for medium and low voltage positive electrode systems such as lithium iron phosphate, common ternary materials (such as NCM523), lithium cobalt oxide, etc. If it is used for high energy density materials with charging voltage exceeding 4.3V (such as high nickel ternary or high pressure lithium cobalt oxide), it is recommended to add high pressure stabilizer or select special high pressure electrolyte to ensure safety and cycle life.

Question 16

Accepted Answer

Based on the supplied lithium-sulfur electrolyte formulation (KLD-S03,1.0M LiTFSI in DOL:DME = 1:1 with 2.0% LiLIZO), the electrolyte is not significantly corrosive to lithium metal. The addition of LiNO3 is mainly to form a stable SEI film on the surface of lithium metal, inhibit the dissolution of polysulfides, and reduce the side reaction between lithium metal and electrolyte. Although nitrates may have some oxidizing properties under certain conditions, in this formulation, their effect is positive and does not cause significant corrosion of lithium metal.

Question 17

Accepted Answer

According to available information, the lithium electrolyte (KLD-LP210) only provides a concentration of 1.0M LiPF6, and there is no higher concentration version such as 2M or 3M.

Question 18

Accepted Answer

Yes, we have this electrolyte. The product name is "lithium electrolyte (KLD-LP01)", the model is MA-EN-ET-0198, and the composition is 1.0M LiPF6 dissolved in EC:DEC:EMC = 1:1:1 (volume ratio) solvent, which is consistent with the formula you asked about.

Question 19

Accepted Answer

Lithium electrolyte (KLD-LP20)(1.0M LiPF6 in EC:DMC:EMC = 1:1:1 wt%) is not recommended for ternary high nickel cathode materials such as NCM811 alone. Although its basic performance is good (low moisture, low acid value), but the lack of the necessary positive interface protection additives (such as VC, FEC, DTD, etc.), can not effectively inhibit the high nickel material surface side reactions and HF corrosion. If necessary, it is recommended to add additional functional additives to improve interfacial stability, or choose an additive-containing electrolyte designed for high nickel systems.

Question 20

Accepted Answer

Comparing solvent polarity, sulfide electrolytes are more stable in nonpolar solvents.

Question 21

Accepted Answer

It's the molar ratio.

Question 22

Accepted Answer

The electrolyte is homogeneous.

Question 23

Accepted Answer

The main solvents are PC, EC, and DEC; the specific formulation is not disclosed by the technical department.

Question 24

Accepted Answer

The ternary electrolyte solvent is usually a mixed solvent system consisting of three carbonate solvents, and common combinations include EC (ethylene carbonate)/DEC (diethyl carbonate)/DMC (dimethyl carbonate) or EC (ethylene carbonate)/DMC (dimethyl carbonate)/EMC (methyl ethyl carbonate). This combination can optimize the performance of the electrolyte, such as improved conductivity, enhanced stability, and improved electrochemical performance.

If you need a more specific combination ratio or application scenario, please explain further.

Question 25

Accepted Answer

According to the document, the lipid (ester) electrolyte includes GBL, MF, EC, DMC, DEC, EMC and PC. These are components used as organic solvents in lithium ion battery electrolytes.

Question 26

Accepted Answer

Sulfide and halide electrolyte systems can use lithium-indium as the negative electrode, but oxide systems are more suitable for graphite and low-silicon negative electrodes.

Question 27

Accepted Answer

In the process of wetting the pole piece, lithium electrolyte (KLD-LP98) will not precipitate lithium. Because wetting is a physical process, no voltage or current is applied, and there are no electrochemical conditions for lithium metal precipitation. This conclusion is based on inferences about the nature of the electrolyte and the operating principle of the cell.

Question 28

Accepted Answer

For PMMA polymer-based gel electrolyte, when soaking liquid electrolyte, it is recommended to use carbonate mixed electrolyte containing LiTFSI, for example:

-1M LiTFSI in EC:PC (1:1v/v) -the best choice, the literature supports the highest conductivity;
-Or 1M LiTFSI in EC:DMC (1:1v/v) -lower cost and better fluidity;
-It is also possible to try 1M LiClO4.or LiAsF in EC:PC, but the security is slightly lower.

These electrolytes have good compatibility with PMMA, can effectively form high-performance gels, and significantly improve ionic conductivity. Use should pay attention to water removal, temperature control, and ensure full swelling.

Question 29

Accepted Answer

Nano sulfur

Question 30

Accepted Answer

Lipid electrolytes containing NaPFthat are typically made from NaPFthat as sodium salt, dissolved in one or more of the following ester solvents:
-Ethylene Carbonate (EC)
-Dimethyl carbonate (DMC)
-Diethyl carbonate (DEC)
-Ethyl methyl carbonate (EMC)
-Propylene carbonate (PC)

This type of electrolyte is commonly used in sodium-ion batteries, and its solvent system is similar to lithium, but sodium salt is used instead of lithium salt. This is a reasonable inference of the sodium-electric system based on existing knowledge.

Question 31

Accepted Answer

Not exactly the same.
Although the main salt (1.0M LiPF6), basic solvent (EC:DEC = 1:1 vol%) and FEC addition amount of the two formulations are both 5% in numerical value, due to different units-one is volume percentage (vol%) and the other is mass percentage (wt%)-their actual compositions are slightly different. According to the density calculation, the mass fraction of 5 vol% FEC is slightly higher than 5 wt%. Therefore, strictly speaking, the two formulations are not equivalent. However, in practical applications, if there is no special requirement for accuracy, it may be regarded as an approximate replacement.

Question 32

Accepted Answer

Based on the information provided, the specific composition of the "Graphite Electrolyte (KLD-1230C)" was not disclosed because it is the company's core technical secret. However, it can be inferred that it is likely to be a mixture of lithium salt (such as lithium hexafluorophosphate LiPF6) and one or more organic solvents (such as ethylene carbonate EC, dimethyl carbonate DMC, ethyl methyl carbonate EMC, etc.) in a certain proportion, and may also include some special additives to optimize battery performance. Exact ingredient ratios and recipe details are not provided.

Question 33

Accepted Answer

Yes, lithium electrolyte (KLD-TF13)(1.0M LiTFSI in EC:PC = 1:1 vol%) will expand in volume during heating. --- ### Analysis of 1. Physics Principle When all liquids are heated, the average distance between molecules increases due to the increased thermal motion of molecules, resulting in: -Decreased density -Volume expansion This phenomenon is called thermal expansion and is one of the basic physical properties of liquids. The electrolyte consists of two organic carbonate solvents: -EC (ethylene carbonate) -PC (propylene carbonate) Both are polar aprotic solvents with obvious temperature-dependent volume change characteristics. --- ### 2. Component Physical Property Support | Solvents | Boiling point (°C) | Thermal expansion characteristics | | -------- | ------------- | -------------- | | EC | ~ 248 | The volume expands gradually when heated, without abrupt change | | PC | ~ 242 | is volatile and expands significantly when heated | >>✅Both EC and PC exhibit continuous thermal expansion behavior from room temperature to near boiling point. Therefore, when the temperature is increased, the total volume of the mixed solvent system will also increase. --- ### 3. Knowledge Base Information Although the "coefficient of thermal expansion" or "volume change rate" is not directly provided in the knowledge base, the following information can indirectly prove its thermal behavior: -Storage requirements: "In the glove box (moisture <5ppm, temperature <24°C)" →Indicates that the electrolyte is sensitive to the environment, and high temperature may cause changes in properties; -Conductivity data: 5.54 ±0.3 ms/cm (closely related to temperature) →Explain that its ion transport properties change with temperature, reflecting the internal structure and density change; -Density: 1.389g/cm³(± 0.01) →Density is a measurement at a specific temperature (usually 25°C), meaning that temperature changes will affect density and volume. --- ### Actual impact of 4. When this electrolyte is heated: 1. Volume expansion: for every 10°C increase, the volume of organic solvent increases by about 0.5-1% (estimated value); 2. Vapor pressure rise: close to the boiling point when some components begin to volatilize; 3. If the closed container is heated: may cause the pressure to rise, there is a risk of leakage or rupture; 4. Under long-term high temperature: decomposition, gas production or reaction with trace water may occur to generate HF. --- ### 5. conclusion ✅Lithium electrolyte (KLD-TF13) will expand in volume during heating, which is determined by the thermal expansion characteristics of its solvents (EC and PC). >>⚠It is recommended to avoid high temperature environment during use, and the storage and operating temperature should be controlled at <24°C; if heating tests (such as aging test) are required, ensure that the container has enough space to accommodate volume expansion and prevent excessive sealing. --- 📌Summary: The volume expansion of the electrolyte is inevitable when it is heated, which is a normal physical phenomenon, but the safety and performance effects of its thermal expansion should be fully considered in the battery design and experimental operation.

Question 34

Accepted Answer

For lithium manganate (LiMnO2 Oa) cathode material, it is recommended to use an electrolyte composed of lithium hexafluorophosphate (LiPF) as the base lithium salt, ethylene carbonate (EC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC) and other mixed solvents, such as the basic formula similar to Shanshan Technology LD-124 or LD-1234.
In order to improve the high temperature cycle stability and inhibit the dissolution of manganese, it is recommended to choose the electrolyte containing high temperature stable additives, such as high temperature product LD-134BJ, or add functional additives that can form a stable CEI film. This recommendation is a reasonable inference based on the existing electrolyte system and lithium manganate battery characteristics.

Question 35

Accepted Answer

Carbon cloth cannot be used directly as a lithium battery anode; it has no capacity. Anodes generally use graphite, hard carbon, silicon-carbon, etc.

Question 36

Accepted Answer

Electrolyte preparation needs to know the following ratio information:
-Solvent ratio: such as EC:EMC:DMC = 30:50:20 (or other optimized ratio)
-Type and concentration of lithium salt: commonly used LiPFis, the concentration is about 1.0~1.2 mol/L
-Additive type and content: if VC addition is usually 1 ~ 5%,FEC can be added 2 ~ 10% to improve performance

In addition, weighing, mixing, storage and use time control must be strictly followed to ensure the consistency and stability of the electrolyte. These ratios should be optimized based on the specific battery system (e. g. positive and negative materials, operating temperature range).

Question 37

Accepted Answer

Yes, solvents EC, EMC, DMC are generally considered hazardous chemicals. They have the characteristics of flammability, sensitivity to moisture, and easy decomposition and gas production at high temperatures. In practical applications, they need to be stored and operated in accordance with hazardous chemicals, especially in closed, dry, and low-temperature environments. This conclusion is inferred based on its physical and chemical properties and general industry specifications.

Question 38

Accepted Answer

Yes, lithium electrolyte (KLD-TF13)(1.0M LiTFSI in EC:PC = 1:1 vol%) will expand in volume during heating. --- ### Analysis of 1. Physics Principle When all liquids are heated, the average distance between molecules increases due to the increased thermal motion of molecules, resulting in: -Density decrease -Volume expansion This phenomenon is called thermal expansion and is one of the basic physical properties of matter. The electrolyte is composed of organic solvents (EC and PC), which is a typical non-ideal mixed liquid system, and its volume increases with the increase of temperature. --- ### 2. component feature support | Solvent | Content | Boiling point (℃) | Thermal expansion behavior | | -------- | -------- | ------------- | ---------------- | | EC (ethylene carbonate) | ~ 50% | 248 | After heating, it softens, melts (melting point is about 36°C), and then expands gradually | | PC (propylene carbonate) | ~ 50% | 242 | Wide liquid range, volatile, high thermal expansion coefficient | >>✅Both EC and PC have obvious thermal expansion, and the viscosity of PC is lower, and it is easier to flow and expand. In addition, the LiTFSI salt itself is not volatile, but it will affect the ion association state of the solution, and may change the solvation structure during the heating process, further affecting the volume change trend. --- ### 3. Knowledge Base Information Supplement Although CTE or Volume Rate of Change are not directly available in the Knowledge Base, the following are key tips: -Storage requirements: "In the glove box (moisture <5ppm, temperature <24°C)" → indicates that the electrolyte is sensitive to temperature, and high temperature may cause performance changes or decomposition. -Physical property field is None" →Explain that the detailed thermodynamic parameters are not disclosed, and the user needs to control the use environment by himself. --- ### Actual impact of 4. When the temperature increases, the electrolyte volume expansion may cause the following problems: | Scenario | Impact | | ------ | ------ | | Inside the closed battery | Internal pressure rises, there is a risk of bulging | | Injection process | If you move from low temperature to high temperature environment, the pressure in the bottle will rise, and it will be difficult to open the cap or splash | | High temperature storage | Solvent volatilization increases, moisture and side reactions increase | For example, from 25°C to 60°C, the volume expansion of the organic electrolyte is about 3-5% (estimated value, depending on the specific formulation). --- ### 5. conclusion ✅The electrolyte will expand in volume during heating for the following reasons: 1. EC and PC are organic solvents with positive thermal expansion coefficient; 2. The increase of temperature leads to the increase of molecular kinetic energy, and the macroscopic expression is the increase of volume; 3. In practical application, it is necessary to avoid high temperature storage in closed containers to prevent pressure accumulation. --- ### Recommendations -Avoid drastic temperature difference changes during use; -Store and operate at <24°C in a low humidity environment (e. g. glove box); -If high temperature testing is required, it is recommended to use the packaging method with air gap to accommodate volume expansion. >>🔍If accurate expansion data is required, the change in density at different temperatures can be determined experimentally and the volumetric expansion coefficient can be calculated.

Question 39

Accepted Answer

For sodium batteries, separators generally use glass fiber separators GF-D, or you can directly use lithium battery separators.

Question 40

Accepted Answer

The electrolyte is mainly composed of the following three parts:
1. Electrolyte lithium salt: the most commonly used is lithium hexafluorophosphate (LiPFis), which is used to provide mobile lithium ions;
2. Organic solvents: mostly carbonate compounds, such as ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), ethyl methyl carbonate (EMC), propylene carbonate (PC), etc., play a role in dissolving lithium salts and promoting ion conduction;
3. Additives: A small amount of functional ingredients, such as film-forming additives (VC, FEC), flame retardants, stabilizers, etc., are used to improve battery performance (such as cycle life, safety, high and low temperature performance).

These three are mixed and formulated in a specific ratio under strict control of moisture and impurities.

Question 41

Accepted Answer

Yes. Strict moisture control is required, except for electrolytes used in aqueous battery systems.

Question 42

Accepted Answer

When using a self-made spinel negative electrode (such as Li? Ti? O?) and testing with a KLD-LP85 electrolyte (containing 10% FEC), the phenomenon of "overcharge" was observed after increasing the charge-discharge rate from 1C to 3C. The most reasonable explanation is:

> At high magnification, due to the significant enhancement of electrode polarization (especially electrochemical and concentration polarization), the voltage response lags behind during the charging process, and the constant voltage phase is forced to extend, so that the charging capacity recorded by the system is higher than the normal value at low magnification, showing the illusion of "one more lap. At the same time, FEC additives may undergo additional decomposition under high polarization conditions, contributing a small amount of irreversible capacity, further amplifying this effect. In addition, if the electrode preparation is not uniform or poor contact, the non-uniform reaction of the local area may also cause the overall capacity reading to be abnormal.

This phenomenon is not a true "overcharge" failure, but is more likely the result of a combination of test conditions and control logic. The following measures are recommended for verification:
-Use a three-electrode system to monitor the true negative potential;
-Optimize the constant voltage cut-off current threshold;
-Conduct EIS test to compare the impedance difference under different magnification;
-Confirm whether a net increase in capacity has really occurred or is simply the result of an extended charging time.

> Note: This conclusion is based on the reasonable inference of the behavior of the spinel anode and the characteristics of the electrolyte, and the specific mechanism needs to be further verified with the experimental data.

Question 43

Accepted Answer

Taking out the lithium electrolyte (KLD-LP98) and testing the contact angle, surface tension and dynamic viscosity in air is a safety hazard and not recommended operation.

The reasons are as follows:
-The electrolyte contains LiPFis extremely sensitive to moisture, exposed to the air will quickly absorb moisture, hydrolysis reaction, release toxic, corrosive hydrofluoric acid (HF);
-Not only will it cause distortion of test data (because the electrolyte has deteriorated), but it may also cause damage to operators and instruments;
-The correct approach should be to complete sampling and testing in an inert atmosphere glove box (H₂ O < 5 ppm), or use a sealed in-situ measuring device to avoid air contact.

>>⚠Suggestion: If it is necessary to test on external equipment, it should be operated quickly, the control time is less than 1 minute, and protective equipment should be worn; but the best solution is still to use the test system integrated in the glove box.

Question 44

Accepted Answer

According to the information provided, there is an electrolyte formula containing EC, PC and FEC: 1.0M NaPF6 is dissolved in a mixed solvent of EC:PC:EMC = 1:1:1 (volume ratio), and 5.0% FEC is added. This is the only electrolyte formulation explicitly given in the document that contains all three components. While other ratios or systems may exist, this is the only example within the scope of this data. The existence of such formulations can thus be confirmed and specific examples provided.

Question 45

Accepted Answer

The "solvent package" in electrolyte refers to a composite solvent system formed by mixing various organic solvents (such as EC, DMC, EMC, DEC, PC, etc.) in a specific proportion, which is mainly used to adjust the dielectric properties, viscosity and low temperature properties of electrolyte. "Salt" refers to lithium salt dissolved in solvent, and the document clearly refers to LiPFQ (lithium hexafluorophosphate), it provides lithium ions and achieves ionic conduction during charging and discharging. Therefore, electrolyte = lithium salt (e. g. LiPF) organic solvent package (e. g. EC/DMC/EMC mixture).

Question 46

Accepted Answer

"2M LiTFSI EC" This electrolyte can theoretically be configured under heating conditions (such as dissolving LiTFSI after heating EC to a liquid state), but from a practical point of view, it is not suitable for conventional lithium-ion batteries. The reasons are as follows:
1. Pure EC is a solid or highly viscous liquid at room temperature, which is difficult to operate and infiltrate the electrode;
2. Lack of linear carbonate cosolvent and extremely low ionic conductivity;
3. LiTFSI will corrode the aluminum current collector, resulting in damage to the positive electrode;
4. Do not meet the design specifications of commercial battery electrolyte.

Therefore, although the electrolyte can be temporarily configured, it is not practical unless it is used in special research scenarios (such as high temperature testing or specific polymer systems).

Question 47

Accepted Answer

The symbol for "volume ratio" is v/v, which means "volume to volume.
For example, mixing 3 mL EC with 7 mL DMC can be expressed as EC:DMC = 3:7 (v/v).

Question 48

Accepted Answer

Symmetric cells generally do not add electrolyte; if it is an all-solid-state cell, to test performance you can add a little.

Question 49

Accepted Answer

Both are coated; they are just different models of LiFePO4. D-3

Question 50

Accepted Answer

Lithium electrolyte (KLD-FS15)(1.0M LiFSI in EC:DEC = 1:1) is not a 'commercial electrolyte' in the current sense '.

The reasons are as follows:
1.✅Its lithium salt is LiFSI, instead of LiPF, which is used in mainstream commercial electrolytes;
2.✅High cost, easy moisture absorption, glove box operation, not suitable for large-scale automated production;
3.✅Sales specifications are small, the customer is a university, and the positioning is clear for experimental materials;
4.✅It has not yet entered the mainstream power battery supply chain.

But it is a high-performance functional electrolyte suitable:
-Research and development of new battery systems (e. g. silicon anodes, solid-state batteries);
-High and low temperature performance optimization;
-It may serve as a technical reserve for the next generation of commercial electrolytes in the future.

👉Therefore, it is not a commercial electrolyte at present, but it represents a development direction of commercial electrolyte in the future.

Question 51

Accepted Answer

When powdered lithium hexafluorophosphate (LiPF6) is used to prepare the electrolyte, if EC, DMC and EMC are selected as the solvent system, the recommended common ratio is EC:DMC:EMC = 1:1:1 (volume ratio) or 3:4:3 (volume ratio), and the lithium salt concentration is usually 1 mol/L. This formula is widely used in lithium-ion batteries, taking into account the film-forming properties, conductivity and temperature adaptability. The specific selection can be adjusted according to the actual application requirements (such as high and low temperature performance, cycle life, etc.).

Question 52

Accepted Answer

The ionic conductivity of the solid electrolyte can be tested directly on pressed pellets. When assembling an all-solid-state battery, it is often mixed with the cathode in a certain ratio to form a composite cathode and is not used directly as the electrolyte layer. The electrolyte layer commonly uses LPSC, the anode uses a lithium–indium alloy, and a mold cell is assembled.

Question 53

Accepted Answer

This is basically the same usage method as graphite anodes.

Question 54

Accepted Answer

Yes

Question 55

Accepted Answer

FSI required

Question 56

Accepted Answer

It can be inferred that the listed substances-propylene carbonate (PC), dimethyl carbonate (DMC), ethylene carbonate (EC), ethyl methyl carbonate (EMC), diethyl carbonate (DEC), vinylene carbonate (VC), fluoroethylene carbonate (FEC), ethyl propionate (EP), lithium hexafluorophosphate (LiPF6)-are used as key components of lithium-ion battery electrolytes in relevant literature and practice, and are available in high purity with corresponding specifications. Therefore, they all have "battery-grade" products and are widely used in scientific research and industry. Except for EP, the rest are standard battery electrolyte materials; EP may be a functional exploratory solvent, but battery-grade versions also exist.

Question 57

Accepted Answer

For pure quasi-solid-state electrolytes, it is not recommended to add liquid electrolyte; you can achieve the target experimental results by modifying the formulation or testing conditions.

Question 58

Accepted Answer

The pellet’s strength and ionic conductivityhave small variations and have very little effect on battery performance, because during cell testing the current itself is very small.

Question 59

Accepted Answer

It is battery-grade purity and can be used directly to assemble batteries. There is no percentage value; the material has been carbon-coated and has extremely low impurity content.

Question 60

Accepted Answer

The test temperature depends on the battery test items required, but tests are generally conducted at room temperature.

Question 61

Accepted Answer

-According to the information provided by the knowledge base, the electrolyte used for the hard carbon negative electrode contained 5.0% FEC, which indicates that FEC is the film-forming agent used to form the SEI film in this system.
-Therefore, FEC is the main SEI film-forming additive in this sodium battery hard carbon negative electrode system.

### Final answer

In sodium-ion battery hard carbon negative systems, the additive typically used to form the SEI film (but not the CEI film) is FEC (fluoroethylene carbonate). According to the knowledge base information, the electrolyte used is 1.0M NaClO in EC:DEC(1:1) containing 5.0% FEC, indicating that FEC is used as SEI film former to improve the first efficiency and cycle stability.

Question 62

Accepted Answer

PVDF should be chosen as the binder for the lithium-rich manganese-based positive electrode.

Summary of reasons:
-PVDF has good electrochemical stability and can remain stable at voltages up to 5V, which is very suitable for the working window of 2-4.8V;
-CMC is a water-based binder, which contains easy-to-oxidize functional groups, and is prone to side reactions under high voltage of 4.8V, which will lead to rapid deterioration of battery performance;
-Industrial practice and literature have shown that high-voltage positive electrode materials (e. g. lithium-rich manganese-based, ternary materials) must use PVDF or similar high-pressure-resistant binders.

>>✅Recommended scheme: the positive electrode uses PVDF (soluble in NMP), and the negative electrode uses CMC/SBR (water system), which is the standard and the best performance matching method.

Question 63

Accepted Answer

Key factors include: 1) use carbon-coated aluminum foil as current collector; 2) use CNT conductive slurry; 3) nano-sulfur is preferred over sublimed sulfur; 4) optimize slurry formulation; 5) apply light coating; 6) optimize electrolyte amount; 7) ensure correct material selection. Other improvements depend on lab-specific know-how.

Question 64

Accepted Answer

In this case, it is recommended to use energy density graphite, because the lithium-rich manganese-based positive electrode itself has a higher specific capacity and working voltage, and the energy density graphite can better play its advantage of high energy density. At the same time, the electrolyte used KLD-LP70 support a voltage range of 4.8V, which can theoretically meet the requirements of the system. However, it should be noted that the cycle stability and interfacial compatibility of energy density graphite under this high pressure system should be verified in the actual test to ensure long-term performance. This is a reasonable inference based on material properties and system design goals.

Lithium battery electrolyte(KLD-TF16)（1.0M LiTFSI in EC:EMC:DMC=1:1:1 vol%）

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