Name: Corrosion aluminum foil
Brand: Canrud
Price: 135.92 USD

Question 1

Accepted Answer

The melting point of aluminum foil is 660 °C.

Question 2

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Aluminum foil

Question 3

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The slurry formulation for the coating is different

Question 4

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

Question 5

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The electrode foil is a double-sided carbon-coated aluminum foil; the other side is coated with a carbon layer

Question 6

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When preparing carbon-coated aluminum foil, the conductive additive is always prepared as a water-based slurry for coating.

Question 7

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Yes

Question 8

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LiFePO₄ has low conductivity. Carbon-coated aluminum foil reduces internal resistance, improves adhesion, and helps prevent electrode cracking.

Question 9

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The density of aluminum is 2.7 g/cm3. To find the length from the mass: mass/density/width/thickness/unit conversion. Meters = 3*1000/2.7/20/0.0016/100

Question 10

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Yes

Question 11

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

Question 12

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We apologize, but this is the core technology of TuTan Materials’ enterprise; the technical department does not disclose it externally.

Question 13

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

Question 14

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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 15

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A thickness of 8–10 μm is recommended.

Question 16

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Conductive carbon plus some binders

Question 17

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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 18

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This hasn't been tested. Try searching on Baidu.

Question 19

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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 20

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This is a crystalline material, not a polymer, so the concept of molecular weight does not apply.

Question 21

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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 22

Question 23

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This has been done before; directly coordinate with the technical department — we can weld the lithium sheets together

Question 24

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Is there a charging plot on the official website? Generally, it must not exceed the normal tested electrochemical window. Look up the theoretical capacity on Baidu; I don’t know that either, but the actual capacity will definitely not reach the theoretical capacity.

Question 25

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Yes, this thickness will not reduce conductivity (copper foil thickness has already reached 4 μm). We’re very sorry, we have not specifically measured this and currently have no data

Question 26

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

Question 27

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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 28

Accepted Answer

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 29

Accepted Answer

Oxide solid electrolytes like LLZO have poor interfacial stability; their surface residual base and the highly catalytic La element inside make them prone to promoting PVDF self-coupling defluorination side reactions when compounded with PVDF-type polymers. Adding EC can mitigate this side reaction, as EC reacts with the residual base first.

Question 30

Accepted Answer

Gasket specifications suitable for 2340 models may include: nylon layer thickness 15μm, aluminum layer thickness 35μm,PP layer thickness 30μm, total thickness 86μm composite material. This conclusion is extrapolated based on the Foil specification of Showa 86um Black Matte Packing mentioned in the knowledge base, assuming similar material requirements for model 2340 devices.

Question 31

Accepted Answer

There is a layer of oxide film on the surface of lithium foil that is adhesive, so when lithium foils come into contact they will adhere to each other. Lithium foil is particularly sensitive to the atmosphere and should be stored in blue-capped glass bottles; before aliquoting it is necessary to vacuum-bake the glass bottles overnight and then place them in the glovebox for one day before subdividing.

Question 32

Accepted Answer

According to the document information, DNP brand aluminum plastic film (Foil) due to the use of PPA as the bonding material between the PP layer and the aluminum layer, has excellent high temperature and high humidity resistance, is not easy to delaminate, showing stronger oxidation resistance and chemical stability. Although the document does not directly test the "high voltage resistance" performance, its stable packaging structure helps to improve the electrochemical stability of the battery as a whole. Therefore, it can be concluded that DNP foil is a relatively more oxidation-resistant and more stable battery packaging material.

Question 33

Accepted Answer

In the tab welding process, tab adhesive is used to insulate and secure the tab relative to other parts. Currently, the domestic market uses white adhesive, black adhesive, yellow adhesive, and single-layer adhesive for tabs. A comparative analysis of these adhesives is as follows: Black adhesive’s functional layer and PP layer are composed of different substances, creating many interfaces; after electrolyte immersion it tends to delaminate, and the black adhesive’s PP layer contains three substances with different melting points: black pigment: 66°C, PE 105°C, PP 137°C, making the interface more unstable. Yellow adhesive’s functional layer has a melting point close to 300°C, so it is easier to operate during heat sealing. Its middle functional layer has replaced the original polybutylene terephthalate with a nonwoven fiber layer, resulting in better interfacial fusion than black adhesive, but it still cannot solve the problem of complete fusion between different materials. Due to the PP layer technology in yellow adhesive, it becomes abnormally hard after heat sealing and loses flexibility; during cell packaging and later processing (tabbing to nickel, adding plates), this can cause the tab adhesive and tab metal to break, leading to electrolyte leakage and gas swelling in the cell. White adhesive uses materials of the same type (PP class) for its three functional layers, so it still maintains high flexibility after heat sealing. White adhesive is produced by co-extruding three layers of PP materials with different functions. Its functional layer has a wide heat-sealing temperature range of 150–180°C, slightly lower than the cell packaging temperature (180–220°C), which can effectively prevent edge short circuits and increases the operable temperature range during cell packaging. Its broader heat-seal temperature ensures fusion with the aluminum-plastic film, and the clear temperature differences among the three PP layers improve packaging operability and increase cell production yield. Single-layer white adhesive is similar to the early inner layer of aluminum-plastic film; because it has only one melting point, if the heat-seal temperature exceeds that melting point it easily causes complete melting short circuits, while insufficient heat-seal temperature leads to softening, which prevents complete melting and polymerization with the CPP layer of the aluminum-plastic film. In the use of tab adhesive, special attention is generally paid to the adhesion between the tab adhesive and the aluminum-plastic film, liquid resistance, the sealing degree with the metal strip, and the tightness of edge fusion and corner sealing. These factors are closely related not only to the properties of the tab adhesive but also to metal strip anticorrosion and wetting treatments, the tab manufacturing process, and the cell sealing process. Therefore, the most suitable tab adhesive should be chosen according to actual process requirements.

Question 34

Accepted Answer

The structure of the lithium–indium alloy foil is an indium sheet sandwiching lithium powder; alloying occurs under applied pressure during use. The negative electrode interface of the lithium–indium alloy does not deteriorate because indium reduces SEI formation and volume expansion, and the growth of lithium dendrites and lithium–indium dendrites differs: lithium dendrites grow vertically through the interface, while lithium–indium dendrites grow in a striped, lateral manner, making them denser and more uniform than lithium dendrites.

Question 35

Accepted Answer

The "AI-plated battery case" you mentioned may have errors in expression or conceptual confusion. According to the available information, no "AI plating" technique is currently applied to battery cases. But we can speculate that what you might want to know is one of the following related technologies:

Aluminum plating (Aluminum Coating): In some battery designs, especially the soft pack battery (Pouch Cell), a composite film with an aluminum layer is used as a shell material (such as aluminum plastic film). This aluminum layer acts as a conductive, shielding and structural support, not a "AI" (artificial intelligence).

2. Surface treatment technology: The battery shell (such as steel shell or aluminum shell) is often surface coating treatment, such as zinc plating, nickel plating, etc., to enhance corrosion resistance, conductivity and welding performance. These are traditional metal surface treatment processes.

3. Application of AI in battery manufacturing: Although it is not "plating AI", artificial intelligence (AI) is indeed widely used in the battery manufacturing process, such:
-Quality inspection (judging battery appearance defects through image recognition)
-Optimization of process parameters (e. g. intelligent control of stirring, coating and rolling processes)
-Fault prediction and sorting (e. g. identification of potential failure risks through data analysis)

To sum up, "plating the AI battery case" is not a practical technology. You may be mistaking "Al plating" (aluminum plating) as "AI plating", or referring to the intelligent application of AI technology in the manufacture of battery cases. Please confirm the specific direction of your question in order to get a more accurate answer.

Question 36

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.

Question 37

Accepted Answer

According to the knowledge base on the principles of current collector selection (avoid alloying, prevent corrosion, ensure stability) and the electrochemical characteristics of magnesium batteries, the following current collector combinations are recommended for magnesium button cell systems:

| Electrode location | Recommended materials | Reason |
| ---------- | ----------- | ------ |
| Positive current collector | Titanium foil (Ti foil) or stainless steel sheet (SS foil) | High chemical stability, resistance to ether electrolyte corrosion, no reaction with magnesium, good conductivity |
| Negative current collector | No additional current collector is required (direct use of metal magnesium sheet) | Magnesium sheet is both an active substance and a conductor, avoiding the introduction of unstable interfaces |

Specific recommendations:
-Titanium foil with a thickness of 0.05-0.1mm is preferred as the positive electrode current collector, suitable for Mo, S, sulfur, organic positive electrode, etc;
-If the cost is limited, 304 or 316L stainless steel mesh/sheet can be used instead;
-It is strictly forbidden to use aluminum foil and copper foil as current collector, especially on the negative side;
-All metal materials should be ultrasonically cleaned with acetone and ethanol before use, and dried in a vacuum drying oven.

This recommendation is based on the analysis of the current collector corrosion mechanism in the knowledge base, combined with the reasonable inference made by the consensus of the actual research of magnesium battery.

Corrosion aluminum foil

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