Name: Electrolytic manganese dioxide (a crystal form )
Brand: Canrud
Price: 15.10 USD

Question 1

Accepted Answer

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

Question 2

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It can function as an anode, but generally exhibits poor cycling stability and rate performance. Performance depends on voltage window and requires experimental validation.

Question 3

Accepted Answer

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

Question 4

Accepted Answer

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

Question 5

Accepted Answer

Use high-nickel specific PVF

Question 6

Accepted Answer

Single-crystal material, recommended formulation, 811: SP:PVDF (high-nickel anti-gel) = 90:5:5. Before testing the electrodes should be roll-pressed; recommended compaction ≥ 2.5

Question 7

Accepted Answer

The customer can make the slurry themselves; we cannot do it at present.

Question 8

Accepted Answer

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

Question 9

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

Question 10

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

Question 11

Accepted Answer

Yes, their crystal structures are the same.

Question 12

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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 13

Accepted Answer

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

Question 14

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It is single crystal

Question 15

Accepted Answer

The ternary electrolyte from the official website

Question 16

Accepted Answer

All are commercial cathode materials

Question 17

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Conventional cathode and anode sheets and ceramic sheets form the battery, and there are contact interfaces that require adding a small amount of electrolyte to wet the interfaces. However, if the ceramic sheet surface is treated together with the cathode and anode material processes so that the electrode materials make better contact with the electrolyte sheet, electrolyte wetting of the interface is not necessary.

Question 18

Accepted Answer

All finished ternary materials (111 523 622 811 series 9xx) are coated; the coating is an oxide. Specific compositions vary by manufacturer and are strictly confidential, not disclosed externally

Question 19

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 20

Accepted Answer

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

Question 21

Accepted Answer

PEO/LiTFSI system, solvent is NMP, EO:Li controlled at a molar ratio of 10–20, operate in a glovebox, spread the prepared slurry evenly in a mold, air-dry naturally and then peel off. A molar ratio of 20 should form and peel off; other components should be adjusted based on your experimental focus and literature.

Question 22

Accepted Answer

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 23

Accepted Answer

We have a recommended compacted density value on our official website for the customer to refer to; if they want to achieve a compacted density within this range, the customer needs to verify it themselves to see the effect after pressing. Calendering according to a compacted density provided by the customer requires customization.

Question 24

Accepted Answer

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 25

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 26

Accepted Answer

Theoretically, you can think of it that way, but impurities are often not simply lithium or sodium metals, so their potentials can differ. Sometimes early reactions can passivate the surface, which is not necessarily bad. That’s also why some electrolyte film-forming additives raise the potential so they react earlier and form a good passivation film on the anode surface.

Question 27

Accepted Answer

Compared with polycrystalline cathode materials, single-crystal cathodes have somewhat poorer conductivity; you need to increase the conductive additive content based on their standard formulation. Alternatively, if you do not want to raise the total conductive additive content, you can replace part of the conductive carbon with CNTs.

Question 28

Accepted Answer

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 29

Accepted Answer

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 30

Accepted Answer

Tear open the sealed bag inside the glove box. The structure of the lithium-indium alloy is double-layer indium foil sandwiching lithium powder. Layering is normal; do not pry it apart. Normally punch out pieces of the appropriate size with a punch, assemble the cell mold, finally insert the lithium-indium alloy piece, apply pressure of 5–10 MPa, and an alloy will form within tens of seconds; of course, waiting a few minutes yields a more uniform alloy.

Electrolytic manganese dioxide (a crystal form )

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