Name: Glass Fiber Filter Membrane/Separator (GF/C)
Brand: Canrud
Price: 709.19 USD

Question 1

Accepted Answer

No, the filter membrane can only be wetted, it cannot become transparent.

Question 2

Accepted Answer

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

Question 3

Accepted Answer

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 4

Accepted Answer

Yes

Question 5

Accepted Answer

In the filtration operation of EC/DMC/EMC mixed solvent (containing 1mol/L LiPF6) after water removal treatment with 3A/4A/5A molecular sieve, glass fiber filter paper (such as Whatman GF/F type) is recommended because of its good organic solvent resistance and high efficiency retention ability for small particles (including molecular sieve powder). If conditions permit, it can be combined with Celite filter layer or use folding method to enhance the filtering effect. Ordinary cellulose filter paper may not be enough to completely block the molecular sieve fine powder, there is a risk of contamination, so it is not recommended to use alone. This choice is not directly stated in the knowledge base, but can be reasonably inferred based on electrolyte properties and routine laboratory practice.

Question 6

Accepted Answer

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 7

Accepted Answer

Our R&D department did not perform any pretreatment when using it. But some instructors did treat it before use.

Question 8

Accepted Answer

Two common methods: 1) drop coating followed by drying, repeated in cycles; 2) roll the slurry into a film on glass, then press it onto the nickel foam.

Question 9

Accepted Answer

Yes

Question 10

Accepted Answer

This is inferred based on the properties of the glass fiber separator and its successful application in sodium-ion batteries.

Question 11

Accepted Answer

None

Question 12

Accepted Answer

The LATP side faces the positive electrode. LATP is easily reduced by lithium metal.

Question 13

Accepted Answer

VGCF is the abbreviation of Vapor Grown Carbon Fiber, which is a high-purity (≥ 99%) carbon material in black powder, with an average diameter of 150 nm and an average length of 10 μm. It is usually used as a conductive additive in the electrode of lithium ion battery, which can effectively construct a three-dimensional conductive network and improve the conductivity and electrochemical performance of the electrode.

Question 14

Accepted Answer

Glass fiber separator GF/D This product does not contain components such as pulp fiber, and its main component is inorganic glass fiber.

Question 15

Accepted Answer

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 16

Accepted Answer

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

Question 17

Accepted Answer

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

Question 18

Accepted Answer

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 19

Accepted Answer

The separator is 12 4 2, measured energy density: gravimetric energy density 185 Wh/kg, volumetric energy density 338 Wh/L

Question 20

Accepted Answer

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

Question 21

Accepted Answer

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 22

Accepted Answer

Our dry cells have all been baked and can be filled with electrolyte directly.

Question 23

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 24

Accepted Answer

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 25

Accepted Answer

In theory it's possible; generally vacuum dry at 40°C for 4 hours is sufficient.

Question 26

Accepted Answer

It is generally recommended to use GF-D types of glass fiber separators for polymer batteries.
Because it is clearly pointed out in the knowledge base "the best wettability to electrolyte" product, and has the thinnest thickness (0.10mm) and high porosity (90%), it can effectively improve the absorption and ion transport properties of polymer electrolyte, and is very suitable for high-performance, light and thin polymer batteries.

Question 27

Accepted Answer

Among the several glass fiber separators provided, the glass fiber separator GF/D is the most suitable for sodium sulfur batteries. This choice is based on the knowledge base explicitly mentioning that GF/D is suitable for sodium batteries and its performance can meet the high temperature and chemical stability requirements of sodium sulfur batteries.

Question 28

Accepted Answer

Not at the moment, but we can procure them depending on customer demand. Would this require a nonwoven fabric separator?

Question 29

Accepted Answer

Glass fiber diaphragm (GF/D) is recommended because it is known to be the most wetted type of diaphragm. If you need to consider other properties (such as thermal stability and safety), you can choose a ceramic diaphragm or PVDF coated diaphragm as an alternative.

Question 30

Accepted Answer

Among the glass fiber separators GF/A, GF/B, GF/C, GF/F, GF/B and GF/F are more suitable for sodium-sulfur batteries.
-GF/B provides good mechanical strength and moderate pore size, suitable for high temperature environment.
-GF/F has higher mechanical strength and finer fibers, suitable for harsh chemical environments.

If a more precise selection is required, it also needs to be evaluated in conjunction with specific battery design parameters (such as current density, operating temperature, etc.).

Question 31

Accepted Answer

Vacuum at 40°C. For pouch cells you generally don't need to dry after tab welding; soft packs have a drying process step.

Question 32

Accepted Answer

The primary component of the fiberglass separator GF/F shall be borosilicate fiberglass, free of organic binders. This is based on the general manufacturing process of the Whatman GF series products and the characteristics of the series to which this product belongs.

Question 33

Accepted Answer

There is no specific "lithium sulfur separator" product in the knowledge base, but according to the application needs and material characteristics, glass fiber separator (such as GF-A, GF-B, GF-D) is a suitable separator type for lithium sulfur batteries. Therefore, if it needs to be used in lithium-sulfur batteries, it is recommended to choose a glass fiber separator, and can be functionalized as needed.

Question 34

Accepted Answer

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

Question 35

Accepted Answer

Soft pack batteries can use the following isolation film:
-PIP40 polyimide solid-state battery separator: suitable for high-performance, high-safety soft-pack batteries, especially for solid-state or gel systems.
-Glass fiber separator GF-A: suitable for liquid systems, especially for soft-pack batteries with high requirements for liquid absorption and thermal stability.

Therefore, it is recommended to use PIP40 or GF-A as the separation membrane of the soft-pack battery. The specific choice can be determined according to the battery system (liquid/solid), electrolyte type and safety requirements.

Question 36

Accepted Answer

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

Glass Fiber Filter Membrane/Separator (GF/C)

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