CMC for batteries

CMC for Batteries

Battery-grade sodium carboxymethyl cellulose (CMC)
Battery-grade CMC exhibits excellent alkali stability, does not hydrolyze within the 15-45°C range, and possesses good acid and salt resistance. The resulting liquid is highly stable, making it suitable for alkaline batteries as an electrolyte additive, and also for zinc-manganese batteries.

Battery-grade CMC is used as a thickener and gelatinizer. The product has good hydrophilicity, uniform substitution, stable viscosity, and high binding strength; the aqueous solution has good transparency and flowability; and it has low metal content.

As an aqueous binder for negative electrode materials, the characteristics of battery adhesive CMC are mainly reflected in the following three points:

1. Molecular weight: Large molecular weight, easy aggregation, and high peel strength.
2. Degree of etherification: High degree of etherification, less undissolved matter; low degree of etherification: high peel strength.
3. DS distribution: Extremely fine metal ions, uniform distribution, high structural viscosity; stable viscosity, strong adhesion; uniform distribution promotes dispersion; mainly used as a thickener in lithium batteries, with excellent adhesion performance, making it an ideal thickener.

Applications of CMC for Lithium:

1. CMC for batteries possesses excellent hydrophilicity and compatibility, allowing for good mixing with various metal powders;
2. CMC binder for lithium ion batteries can improve the battery's voltage plateau, reduce internal resistance, and lower internal pressure, thereby enhancing the battery's high-current operating characteristics;
3. Battery-grade CMC, as a molecularly stable binder, provides stable viscosity and adhesion, facilitating production control.

FAQ

1. Q: What is the main function of battery-grade CMC?
A: It is used as a binder and dispersant in the negative electrode of lithium batteries. It effectively disperses graphite or silicon-based materials, enhances the adhesion between the coating and copper foil, and ensures electrode uniformity and battery cycle life.

2. Q: How do the viscosity and substitution degree of CMC affect battery performance?
A: Too low a viscosity will affect slurry dispersion and electrode adhesion, while too high a viscosity may lead to poor slurry flowability. The uniformity of substitution degree directly affects the transparency and stability of the slurry. Our product specifications are precise and controllable, ensuring a good match with your formulation.

3. Q: Can you provide sample testing and technical support?
A: Of course. We provide free samples for your testing. Our technical team can assist in optimizing CMC selection, dosage, and dissolution process according to your formulation system and process requirements.