Name: Battery fabrication test
Brand: Canrud

Question 1

Accepted Answer

Powder can be made into discs; you need to consult the literature for fabrication methods. Discs cannot be reused

Question 2

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

Question 3

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

Question 4

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rest 4h, 0.2C DC to 0V, 0.1C DC to 0V, 0.01C DC to 0V, 10μA DC to 0V, rest 3 min, 0.1C CC to 2V. This is the test procedure.

Question 5

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Our graphite electrode test results are on the official website

Question 6

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

Question 7

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Such fluctuations are generally caused by insufficient battery stability. Did the customer previously assemble batteries of other systems, and were those test results stable?

Question 8

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Nano sulfur

Question 9

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We haven't measured this data; the customer needs to test it themselves.

Question 10

Accepted Answer

NZSPO — this is a relatively mainstream and mature sodium-ion solid electrolyte technology at present. Regarding stability, it is stable across a voltage range of 0–4.5 V; it is stable at high voltage, and at low voltage it undergoes some reduction and valence change, but this does not greatly affect battery performance. If examining the mechanism microscopically, the low-voltage behavior may involve valence changes at the nanolayer level.

Question 11

Accepted Answer

Yes, it can be used; for the exact wiring, have the instructor contact the electrochemical workstation's technical support.

Question 12

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This separator is the Celgard 2500 separator. We ourselves have not tested it the way the customer did. When we use it, we assemble cells directly and test cell performance.

Question 13

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The ternary electrolyte from the official website

Question 14

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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 15

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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 16

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

Question 17

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

Question 18

Accepted Answer

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

Question 19

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rest 2h, 0.2C DC to 0V, 0.1C DC to 0V, 0.01C DC to 0V, 10 μA DC to 0V, rest 3 min, 0.1C CC to 2V — this is the first cycle gravimetric capacity test step

Question 20

Accepted Answer

Every current needs to discharge down to 0.005 V

Question 21

Accepted Answer

We haven't tried that and aren't sure; this asphalt is a very commonly used grade for coating battery materials.

Question 22

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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 23

Question 24

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

Question 25

Accepted Answer

It is normal; it should be on the official website. This varies with different electrolytes; 90%–94% is all normal.

Question 26

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

Question 27

Accepted Answer

We haven't tried that, so we're not sure; this grade of asphalt is a very commonly used type for battery material coatings.

Question 28

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From our current packaging results, a packaging thickness of about 2.6–2.7 mm works better

Question 29

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

Question 30

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FSI required

Question 31

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The electrolyte pellets are simply ground and polished, then gold-sputtered on both faces, leaving the edges unsputtered. The gold-coated pellet is clamped between the two faces with a coin-cell test clip for measurement.

Question 32

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This is basically the same usage method as graphite anodes.

Question 33

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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 34

Accepted Answer

Electrospinning. The composition is pure PI; due to processing factors it is yellow. Not composite, just a yellow film.

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

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 37

Accepted Answer

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

Question 38

Accepted Answer

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 39

Accepted Answer

Hardness has not been tested. Check whether this item is listed in the material specification sheet

Question 40

Accepted Answer

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 41

Accepted Answer

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 42

Accepted Answer

There are no specific gold-sputtering parameters because instruments vary, but there is an evaluation criterion: after gold plating, use a multimeter to test the resistance between any two points; values close to 1 ohm are ideal. The lower the vacuum during gold sputtering, the better. Continuous runs are not recommended because the plating equipment can become hot inside, and temperature will affect the evaporation/plating results.

Question 43

Accepted Answer

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 44

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 45

Accepted Answer

Approaches include: reducing particle size; surface modification or coating; using high-performance conductive additives; reducing binder content while maintaining adhesion; improving mixing uniformity; optimizing current collectors; balancing compaction density; and optimizing electrolyte composition.

Battery fabrication test

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