Name: powder tablet press
Brand: Canrud

Question 1

Accepted Answer

Press the dry powder into green bodies in a steel die at 250–500 MPa, cover with parent powder, sinter in an argon-atmosphere furnace at 1200°C for 2 h, then grind the sintered plates.

Question 2

Accepted Answer

For oxide electrolyte pellets assembled into button cells, common dimensions are 10–16 mm diameter and 1 mm thickness, matching CR2032 cases. Ceramic pellets are quite hard but brittle; the pressure needed when crimping a button cell must be determined experimentally. During assembly the parts must be aligned, all contact surfaces flat and free of debris, and pressure applied slowly. Assembly skill is important; you cannot guarantee the pellet won’t crack regardless of how you press.

Question 3

Accepted Answer

Tablet pressing pressure is too high, internal stress is excessive, making it prone to cracking. Also affected by the sintering process, density is not high. Need to adjust temperature to increase crystallographic density, and need to suppress lithium volatilization.

Question 4

Accepted Answer

No SEM images; Na3Zr2Si2PO12 powder shows primary particles of 3–5 µm under the electron microscope, and a particle size analyzer measures 10–40 µm. Depending on the specific use: if used as filler in composite polymers there is no need to sinter, but if making oxide electrolyte pellets you need to press the green body and sinter it into ceramic pellets.

Question 5

Accepted Answer

LATP-C: the micron powder is about 5 µm, the nanopowder about 300 nm. Particle size has little effect on sintered ionic conductivity but affects shrinkage; however, LATP’s shrinkage is very small, so the impact is minor. Powders with different particle sizes can also be mixed for pressing green bodies. Use a pressing pressure of 250–500 MPa and a sintering temperature of 800–1000°C. The sintering temperature for nanopowder is slightly lower than for micron powder.

Question 6

Accepted Answer

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 7

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 8

Accepted Answer

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

Question 9

Accepted Answer

There is currently no such product.

Question 10

Accepted Answer

Lithium cobalt oxide (high-voltage type) - Z-4.45V

Question 11

Accepted Answer

No coating

Question 12

Accepted Answer

Yes, it is multi-walled carbon nanotubes (MWCNT).

Question 13

Accepted Answer

Roll some cylindrical objects to secure it, put it into a bag with the opening exposed, for small sheets press them down with something, evacuate and replace the gas more slowly.

Question 14

Accepted Answer

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

Question 15

Accepted Answer

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

Question 16

Accepted Answer

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

Question 17

Accepted Answer

Store in a cool, dry place, sealed.

Question 18

Accepted Answer

It's the molar ratio.

Question 19

Accepted Answer

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

Question 20

Accepted Answer

This is rGO

Question 21

Accepted Answer

As a polymer electrolyte matrix, it is combined with other components, for example lithium salts, fillers, polymers, etc.

Question 22

Accepted Answer

It can be used after drying, but there may be some effects: capacity might decrease and internal resistance may increase.

Question 23

Accepted Answer

Only polymer matrix powder, no finished polymer film.

Question 24

Accepted Answer

Yes.

Question 25

Accepted Answer

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

Question 26

Accepted Answer

After rolling, the electrodes will all exhibit this curling when electrolyte is dropped on them. Suggested improvements: 1) When baking the punched electrodes, press them flat with a plate while baking; 2) Optimize the assembly method. We usually place the electrode on the spacer, drop the electrolyte, and then cover it with the separator, which also makes subsequent assembly easier.

Question 27

Accepted Answer

Consider using electrolytes with relatively soft particulate textures; under pressure their interparticle interface impedance and grain boundary impedance are smaller, such as sulfides and halides. However, in general, sulfides can serve as electrolyte layers, while halide electrolytes are often used as ion-conducting additives in cathode materials. Currently, the sulfide electrolyte powders we have on sale are Li6PS5Cl, Li5.5PS4.5Cl1.5, Li5.3PS4.3Cl0.8Br0.7, Li3PS4, Li7P3S11, and LGPS. The halide is Li3InCl6.

Question 28

Accepted Answer

The information on the official website is what it is; if it's not there, it's not there.

Question 29

Accepted Answer

If it needs firing, a binder must also be added.

Question 30

Accepted Answer

Comparing solvent polarity, sulfide electrolytes are more stable in nonpolar solvents.

Question 31

Accepted Answer

High molecular weight, narrow molecular weight distribution, low catalyst residue, can be completely dissolved in water.

Question 32

Accepted Answer

If lithium salt is added, evaporation must be done in a glovebox; lithium salts must not contact water, as they are hygroscopic and deliquescent.

Question 33

Accepted Answer

Two approaches: pressing and sintering into dense pellets; or slurry coating with binder and solvent, which usually requires additional liquid electrolyte due to limited density.

Question 34

Accepted Answer

Sulfide electrolytes are synthesized as plates; after refinement processes to control particle size, they are not sieved.

Question 35

Accepted Answer

Not used as the primary electrolyte layer; it is generally used as an ion-conducting additive in the cathode. It can be directly paired with cathode materials such as LCO and NCM622, and the cathode material surface does not need coating.

Question 36

Accepted Answer

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

Question 37

Accepted Answer

Polyethylene oxide (PEO) is a polymeric substrate that needs to be dissolved in a solvent, have lithium salt added, and then be dried into a film. It cannot be directly pressed from powder.

Question 38

Accepted Answer

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 39

Question 40

Accepted Answer

Oxide electrolyte ceramic sheets are cold-pressed and sintered, not simply molded by compacting powder; in addition, especially thin sheets or those with larger areas are prepared by tape casting.

Question 41

Accepted Answer

Under normal circumstances, poly(ethylene oxide) (PEO) will become a colorless or slightly yellow liquid when dissolved; the choice of solvent also affects the color.

Question 42

Accepted Answer

We haven't weighed it precisely. If using the powder-burying method, a relatively large amount is needed to fully cover the pellet.

Question 43

Accepted Answer

If humidity cannot be controlled, recommend the customer use 523; 811 generally needs mixing, doctor-blading, etc., in a dry environment.

Question 44

Accepted Answer

The presence of niobium has little effect on sintering; this one actually performs better. The final quality of the ceramic plate mainly depends on the sintering process.

Question 45

Accepted Answer

The above description is all the information available; the specific process is not known.

Number of Columns	2
Cylinder Diameter	Chrome Plating Cylinder Φ45mm
Table Size	Φ80mm(D)
Overall Size	225 x155x380mm(L * W * H)
Equipment Weight	28KG

maximum piston stroke	30mm(T)
pressure gauge	pressure and pressure double scale display
pressure stability	≦ 1MPa/10min
Pressure range	0-5T

powder tablet press

Details