Name: LMFP-Lithium Manganese Iron Phosphate (LiFeMnPO4)-Cathode Powder
Brand: Canrud
Price: 24.16 USD

Question 1

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An aqueous slurry for cathode materials has not yet been developed.

Question 2

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Half-cell discharge data, lithium foil used as the anode

Question 3

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Model code

Question 4

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Different manufacturers vary; recommend the customer use D-3

Question 5

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Conductive carbon: SP, CNT; binder: PVDF-5130

Question 6

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This temperature is fine.

Question 7

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Refer to other iron-lithium materials; they are the same

Question 8

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There is related data in the electrode sheet parameters on the official website

Question 9

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Lithium cobalt oxide (high-voltage type) - Z-4.45V

Question 10

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

Question 11

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

Question 12

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Cathodes are generally universal; it depends on system pairing and performance requirements. Currently commonly used are nickel–cobalt–manganese ternary (NCM) and lithium iron phosphate (LFP). LFP offers high safety and long cycle life but has moderate energy density and poor conductivity. NCM has higher energy density and better cycling stability and is an important development direction for solid-state battery cathodes, but high-nickel safety issues still need to be addressed. NCM811 for solid-state use requires coating treatment; there are existing niobate-coated NCM811 and borate-coated NCM811 options, which can be selected according to experimental needs.

Question 13

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No, it cannot. It needs to be cleaned off — the LFP electrodes are fully coated and it must be wiped away.

Question 14

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We really haven't tested the hardness of the powder material.

Question 15

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We are very sorry — we really don't know. These two materials are both produced by companies that rank among the top three in the industry; they do not disclose any production technical details externally.

Question 16

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We really haven’t tested hardness for the powder material.

Question 17

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Haven't tested it, but judging from the structural formula, the material's electrochemical stability should be fine.

Question 18

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All are commercial cathode materials

Question 19

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For our sodium nickel manganese iron oxide we use our own 12 4 2 separator. For the hard carbon capacity tests, our testing procedure is: rest 2 h, 0.2C DC to 0 V, 0.1C DC to 0 V, 0.01C DC to 0 V, 10 μA DC to 0 V, rest 3 min, 0.1C CC to 2 V.

Question 20

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It's because of conductivity issues. Cathode materials themselves have poor conductivity, so they are generally coated.

Question 21

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PEO itself is very stable in air, but it is generally used mixed with lithium salts, which are hygroscopic and absorb water; LATP is stable in air.

Question 22

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The current maximum achievable is 4.3 mAh/cm2

Question 23

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Nano sulfur

Question 24

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If the electrode sheet parameters are provided, it can be calculated.

Question 25

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Not used as the primary electrolyte layer; it is generally used as an ion-conducting additive in the cathode. It can be directly paired with cathode materials such as LCO and NCM622, and the cathode material surface does not need coating.

Question 26

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

Question 27

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It can be used after drying, but there may be some effects: capacity might decrease and internal resistance may increase.

Question 28

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I confirmed with our engineering department that this inflection point is basically related to the electrolyte formulation; some formulations exhibit this inflection point while others do not. The specific technical details have not been fully researched by the engineering department yet.

Question 29

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Yes, carbon-coated aluminum foil (single-sided carbon coating) can be used to support lithium manganese iron phosphate (LMFP) positive electrode slurry.

The reasons are as follows:
-The carbon coating layer significantly improves the electronic conductivity between the current collector and the low-conductive positive material;
-Improve the adhesion of the slurry to prevent material falling;
-Strong process compatibility, suitable for laboratory scraping and industrial continuous coating;
-Industry practice has verified its effectiveness.

Therefore, this is a reasonable and recommended technical solution, especially suitable for manganese iron phosphate lithium battery systems that require high rate performance or long cycle life.

Question 30

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You can use 523: SP:PVDF = 90:5:5

Question 31

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Pure sulfur

Question 32

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No coating

Question 33

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Use 5130 for high-nickel, use 900 for ordinary.

Question 34

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LATP solid electrolyte coating separators can theoretically be used with liquids. (If the anode is lithium metal, the LATP-coated side should face the cathode)

Question 35

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For the coating of lithium manganese iron phosphate (LMFP) cathode materials, the most suitable current collector is "carbon-coated aluminum foil", especially single-sided carbon-coated type.

The reasons are as follows:
-✅Significantly improve the conductivity, to make up for the low conductivity of LMFP;
-✅Enhance the adhesion of the slurry to prevent powder falling during coating and rolling;
-✅Inhibit the oxidation and corrosion of aluminum foil under high voltage;
-✅Strong process compatibility, suitable for laboratory scraping and industrial continuous coating;
-✅The industry has been widely used to verify its effectiveness.

Therefore, it is recommended to use single-sided or double-sided carbon-coated aluminum foil as the substrate for lithium manganese iron phosphate cathode coating, which can significantly improve the overall electrochemical performance and stability of the battery.

Question 36

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Yes

Question 37

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Which system do you want to work on? Sulfide or oxide? For oxide systems use LLZO; for sulfide systems use LPSC.

Question 38

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In the lithium manganese iron phosphate (LMFP) electrochemical data coating process, whether to add a dispersant depends on the specific type of conductive agent and slurry formulation. For example, when a Ketjen Black (KB) conductive agent is used, a dispersant may be added in order to improve its dispersibility. However, in general, the use of dispersants is not necessary, but is adjusted according to actual needs.

Question 39

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We don't have more cycling data updates for now; we will test and complete them later.

Question 40

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We tested it in a half-cell; theoretical gravimetric capacity >95 mAh/g

Question 41

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You can try ball-milling the LATP powder in anhydrous ethanol or isopropanol to increase the powder surface activity, then dry it before pressing and sintering. Alternatively, add a PVA binder solution; this requires adding a drying temperature hold and a binder burn-out hold during the sintering process, for example 100°C for 1 h and 500°C for 1 h, then raise to the sintering temperature. This is for reference only; specific parameters need experimental investigation.

Question 42

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Currently there is niobate-coated NCM811 and lithium borate-coated NCM811; niobate-coated NCM811 is used more widely and feedback is good. There are fewer usage data for lithium borate-coated NCM811.

Question 43

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The coating amount refers to the mass of surface modifier adsorbed on the surface of a given mass of powder, so the coating amount on each NCM811 is 0.6%.

Question 44

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In half-cells, all tested materials act as the cathode, while lithium metal is the anode. Charging corresponds to delithiation of the test material; discharging corresponds to lithiation.

Question 45

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As a polymer electrolyte matrix, it is combined with other components, for example lithium salts, fillers, polymers, etc.

Question 46

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Confirm the voltage window of this fluoride. If it is conventional, LPSC or LLZO are fine; if it is high-voltage, prioritize LLZO.

Question 47

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Yes.

Question 48

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Single-crystal has a higher tap density and higher energy density; polycrystalline has better rate performance.

Question 49

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LMO is the abbreviation of lithium manganese oxide (Lithium Manganese Oxide, chemical formula: LiMn2O4), which is a commonly used cathode material for lithium ion batteries. It has good safety and low cost, and is often used in consumer electronics, power tools and some power batteries. In the context provided, LMO refers to a cathode material product that ATL is developing and optimizing.

Question 50

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It can be used directly; preferably vacuum bake at 85°C for 6 hours

Question 51

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Yes, LMFP refers to lithium manganese iron phosphate, that is, a lithium-ion battery cathode material with LiMn. Fe. Fe. PO? as the main component. It is a solid solution material formed by introducing manganese element on the basis of lithium iron phosphate (LFP), and has higher working voltage and energy density. In our product system, the material model is MA-EN-CA-0014, and the electrolyte used is "lithium manganese iron phosphate electrolyte KLD-LMFP03A", in which "LMFP" has been used as the standard abbreviation of the material system. Thus, "LMFP" may be understood as a generic abbreviation for "lithium manganese iron phosphate.

Question 52

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

Question 53

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MnO2:PVDF:Super P = 94:3:3 is the formulation, and then optimize based on that.

Question 54

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If lithium salt is added, evaporation must be done in a glovebox; lithium salts must not contact water, as they are hygroscopic and deliquescent.

Question 55

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Sulfide electrolytes are synthesized as plates; after refinement processes to control particle size, they are not sieved.

Question 56

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Polyethylene oxide (PEO) is a polymeric substrate that needs to be dissolved in a solvent, have lithium salt added, and then be dried into a film. It cannot be directly pressed from powder.

Question 57

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Oxide solid electrolyte powders are themselves formed by sintering. There are several uses: (1) make into a slurry to coat separators; (2) mix into the cathode as an additive to enhance ion conduction; (3) press the powder into green bodies and then sinter to make discs for cell assembly. Note: green bodies made by pressing oxide electrolyte powder have excessively high grain boundary resistance and cannot be used directly for cell testing; (4) use as fillers in composite polymer electrolytes.

Question 58

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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 59

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There is currently no such product.

Question 60

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Use high-nickel specific PVF

Question 61

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This is determined by trial and error; different equipment will certainly require different settings.

Question 62

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Yes, it is multi-walled carbon nanotubes (MWCNT).

Question 63

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What is the purpose of the experiment? For preparing composite electrolyte membranes, choose the solvent based on the lithium salt used; you can consider DMAC   acetone. Of course, for specific solvent selection and usage, consult relevant literature for your experiment.

Question 64

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Yes, it is.

LMFP-Lithium Manganese Iron Phosphate (LiFeMnPO4)-Cathode Powder

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