CMC Carboxymethyl Cellulose
Carboxymethyl Cellulose Sodium, Carboxymethyl Cellulose, shortly CMC, used as additive in different field,CMC has the fuctions of thickening ,suspending,emulsifying, stabilizing ,shaping, filming,bulking, etc. It can replace the application of guar gum,gelatin and pectin.It is widely used in modern industry,such as food, ceratic,paper making, toothpaste , coating etc.
Dynacel® Battery Grade CMC with the strong cohesion, good heat stability, electrical conductivity and electrochemistry property, makes the active substance and electrolyte form the even and dispersive paste, and takes the hydrogen bond effect with the silicon, therefore, it is not only widely used as the binder of cathode and anode, gel for cathode protection, but also widely applied in the silicon base electrode and graphite modification.
Description
Commodity Name: Carboxymethyl Cellulose Sodium
Molecular Formula: C8H16NaO8
EINECS:618-378-6
Molecular Weight: 265.204
Structural Formula:
HS CODE:39123100.00
CAS NO.: 9004-32-4
Advantages
A. With the strong shear-thinning property, CMC can adjust the rheoloty of the slurry;
B. Excellent circulation, primitive reversible capacity and better capacity retention;
C. Effectively cushion the change of the volume swelling of the silicon-based electrode, and improve the electrode reversibility;
D. With the double optimization to mechanics stability and the chemistry stability, CMC promotes to form the SEI film;
E. CMC impacts on silicon granule, and reduces the damages for silicon-based electrode volume swelling;
F. Effectively inhibit the side-reaction between high reactive Li-Si alloy and electrolyte;
G.Use with other gel binders, and enhance the binding strength and activation properties.
Specs:
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Property: |
|
|
Appearance |
White or cream colored powder |
|
PH(1% in water solution) |
6.0-8.5 |
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Viscosity (Brookfield LVT ,1%,25c, 3,30rpm) |
100-1000cps |
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Degree of Substitution |
Min.0.8 |
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Purity (dry basis ) |
Min.80% |
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Loss on drying |
Max.8.0% |
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Moisture |
≤10.0% |
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Partical Size |
Min.99% pass throught 30mesh |
Application
CMC used in the silicon-based electrode, besides the heat stability, conductivity and electrochemisty, the strong hydrogen bond exists between CMC and silicon. Hydrogen bond has the self-recovery, and it can adjust the stress which continuously enlarge during the circle process of the material and so that it can maintain the stability of the material structure, and keep the capacity over 1000mAh/g during at least 100 times circulation, and the coulombic efficienty reaches 99.9%.
Dosage: 50mg/kg-200mg/kg
FAQ
Q: Could we supply samples?
A: Yes, we provide samples freely, but shipping charges will be paid by buyers. Thanks,
Q: What is your terms of delivery?
A: EXW, FOB, CFR terms etc. This is subject to customer’s requirement.
Q: What is the lead time?
A: About one week
Q: What is payment term?
A: LC, DP at sight, T/T etc.
Q: How to control the goods quality?
A: First the sample approval. When we sign the formal contract with clients, you could require us to send the pre-shippment sample, after the pre-shippment sample confirmed, then arrange the delivery. We can also ask the third -party testing institutions to our factory site sample testing.
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