Name: In situ Raman testing cell for lithium-air batteries (K-Raman-01)
Brand: Canrud
Price: 1721.63 USD

Question 1

Accepted Answer

The amount of electrolyte filled is 4 g

Question 2

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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 3

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

Question 4

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Na3Zr2Si2PO12 is a sodium-ion-conducting solid electrolyte used in sodium solid-state battery research. Cells are assembled as button cells; the assembly structure is similar to conventional liquid electrolyte button cells, but the central separator is replaced with a solid electrolyte disc, and no liquid electrolyte is required (a very small amount of liquid electrolyte is added when testing cell performance to wet the interfaces).

Question 5

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This is basically the same usage method as graphite anodes.

Question 6

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

Question 7

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No. It must be handled in a controlled atmosphere.

Question 8

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Particle size analyzer measured; under conditions of a drying oven with a dew point below -50°C, short-term rapid testing is fine.

Question 9

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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 10

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The slurry formulation for the coating is different

Question 11

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Yes

Question 12

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

Question 13

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

Question 14

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Cold pressing at 300 MPa, holding a pressure of 30 MPa during testing.

Question 15

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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 16

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This separator is composed of a PE base film, an alumina coating, and a LATP oxide electrolyte coating, and does not contain any lithium salts.

Question 17

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The solid content varies between different products; please check the official website for specific parameters

Question 18

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Solid-state-specific carbon-group anodes are still under development; currently there are no such products. For solid-state-specific lithium metal anodes, lithium–indium alloy is available at present.

Question 19

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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 20

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Voltage plateau is influenced by material properties, formulation, electrolyte ionic conductivity, and applied current. Higher current leads to greater polarization and lower voltage.

Question 21

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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 22

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Yes, it is stable in air and moisture; it just depends on whether other materials in the experiment require environmental control.

Question 23

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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 24

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It's single-sided

Question 25

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There is currently no such product.

Question 26

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Must be cut in a glove box. After cutting, it should be rolled using a PTFE or glass rod. For potassium batteries, the metal is often rolled into thin sheets after forming small spheres. Rolling can be done directly on spacers, which then serve as carriers during coin cell assembly.

Question 27

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Electrolyte must be added, because this is not a pure solid electrolyte membrane; the intermediate base film is polyethylene (PE), which requires electrolyte to transport lithium ions.

Question 28

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That molecular weight really hasn't been made public; it's a binder dedicated to lithium batteries, and the purity is very high.

Question 29

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A thickness of 8–10 μm is recommended.

Question 30

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Not yet commercially produced.

Question 31

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Can be used as an anode material for solid-state batteries; lithium–indium alloy can to some extent inhibit lithium dendrite growth, and is commonly paired with sulfides and halides.

Question 32

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Our graphite electrode test results are on the official website

Question 33

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Different manufacturers and preparation processes; purity is all 99.9%. Can be used as precursor materials for sulfide electrolytes or cathodes for Li–S batteries. Specific electrochemical performance has not been tested and is unclear.

Question 34

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Silicon monoxide is the anode material for lithium batteries; its surface has already been coated with carbon material; it is not pure silicon monoxide.

Question 35

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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 36

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Possible causes include poor cell assembly stability, material degradation at high rates, or lithium dendrite formation causing micro short circuits.

Question 37

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Ionic conductivity is on the product detail page of the official website. Some nano-scale modifications have been done, making water and air resistance slightly better. Specific details are not convenient to disclose.

Question 38

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No other substances were added.

Question 39

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We are very sorry. Our company mainly provides materials for the preparation of lithium-ion batteries; we are indeed not familiar with the specific preparation processes for battery manufacture. We apologize.

Question 40

Question 41

Accepted Answer

Recommended hard carbon capacity testing procedure: Rest 4 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 42

Accepted Answer

Just create a group chat to communicate. The customer provides the electrodes and separator; we can handle the assembly.

Question 43

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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 44

Accepted Answer

LATP, LAGP, and NZSPO are stable to air and moisture and can be used in normal environments, but it is still best to keep the materials dry when assembling cells; LLZTO is more sensitive to moisture and must be handled in a glovebox or low-humidity room.

Question 45

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LAGP, LATP, and NZSPO are water-stable. LLZO and LLTO are slightly sensitive to moisture; they can be exposed to air for short periods in a low-humidity room, but prolonged exposure will have some effect.

Question 46

Accepted Answer

Follow their previous procedure; no need to consider the fixtures.

Question 47

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

Question 48

Accepted Answer

Compared with several other oxide electrolytes, LLZTO has relatively high ionic conductivity, about 8*10^-4 S/cm, and better stability against lithium metal, which to some extent suppresses lithium dendrite growth. If LLTO or LATP are used, the titanium in them is easily reduced and their stability with lithium is poor. The only issue is that they are not very stable in water, so doping modifications have been made to improve air stability while maintaining ionic conductivity.

Question 49

Accepted Answer

Use fiberglass/regular PE film/alumina ceramic separator, or for all-solid-state use NZSPO.

Question 50

Accepted Answer

It depends on the intended use. If it is for assembling pellet cells for electrical testing, the powder needs to be pressed into green bodies, then sintered into ceramics, and finally ground and polished for use. The green body can be made without adding other substances, or sintering aids, binders, etc. can be added. If used as a filler for polymer composite electrolytes, it can be added directly, or the particle size can be controlled according to experimental requirements before use.

Question 51

Accepted Answer

Currently commonly used are graphite, silicon–carbon, and lithium metal anodes. Silicon–carbon options use low silicon content to avoid excessive volume expansion. For lithium metal anodes, serious lithium dendrite growth must be considered in applications; lithium–indium alloy can be used to suppress the longitudinal growth of lithium dendrites to some extent.

Question 52

Accepted Answer

The separators inside dry battery cells are ceramic-coated separators; baking at 85°C is fine.

Question 53

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They must not be exposed to water or oxygen, though short exposures are tolerable. The surface has a passivation layer that must ultimately be polished off before gold sputtering. After polishing, transfer quickly, pump down and replace the atmosphere before sputtering gold.

Question 54

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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 55

Accepted Answer

Possible reasons include: 1) air bubbles in slurry (vacuum degassing recommended); 2) foreign particles introduced during mixing or coating; 3) foreign materials acting as foaming agents; 4) insufficient slurry dispersion.

Question 56

Accepted Answer

[Powder Pressing Method] Dry powder is placed into a steel die and pressed at 250–500 MPa to form a green body, then sintered in a muffle furnace in air atmosphere at about 900°C for 3–24 hours. After sintering and cooling, the ceramic discs are ground. The green body pressing may include a binder or not, and may include a sintering aid or not. Binders used include PVA, PVB, etc.; sintering aids include boron oxide, lithium borate, and similar. Note that if a binder is added, the sintering must be staged to allow binder burn-out; otherwise the carbon content will be too high.

Question 57

Accepted Answer

The 16mm separator typically matches a 16mm diameter Swagelok battery, which is a standard size configuration common in the laboratory.

Question 58

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For sodium batteries, it is recommended to use glass fiber / regular thick PE / alumina ceramic separators, or for all-solid-state use NZSPO ceramic sheets.

Question 59

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LiCl is hygroscopic in air; brief exposure can be reversed by reheating to remove crystalline water, but prolonged exposure to humid air will cause further decomposition. It is stable at room temperature; it has not been tested at high temperatures.

Question 60

Accepted Answer

They cannot be baked that high; there is still concern about separator shrinkage

Question 61

Accepted Answer

NASICON-type solid electrolyte, such as Na₃Zr₂Si₂PO₁₂.Kaolinite-based solid electrolyte, which is more suitable for aqueous zinc-ion batteries.

Question 62

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 63

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The lithium foil diameter is determined by the diameter of the electrode and the separator. The lithium foil diameter should be larger than the electrode diameter and smaller than the separator diameter. The greater the differences among these three diameters, the easier assembly and better contact for the coin cell. The internal total thickness of a 2032 coin cell case needs to reach about 3.2 mm; any shortfall can be filled with shims. The main thing is to choose the diameter.

Question 64

Accepted Answer

Yes

In situ Raman testing cell for lithium-air batteries (K-Raman-01)

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