Lithium Ion Battery Anode Material Carboxymethyl Cellulose CMC Powder

Product Overview

This high-purity carboxymethyl cellulose (CMC) powder is a specialized water-soluble polymer engineered specifically for battery electrode fabrication and advanced electrochemical research. Serving as an essential thickening agent, dispersion stabilizer, and co-binder in negative electrode formulations, the material facilitates uniform active material distribution and robust mechanical integrity across current collectors.

Optimized for next-generation lithium-ion, sodium-ion, and lithium–sulfur battery systems, this polymer is widely utilized in pilot lines, academic laboratories, and industrial cell manufacturing facilities. It enables full aqueous-phase slurry processing, eliminating the necessity for costly and hazardous organic solvents while delivering predictable rheology during high-speed roll-to-roll electrode coating.

Manufactured under stringent quality control protocols, the product exhibits exceptional batch-to-batch consistency, minimal moisture retention, and tightly regulated trace metal impurities. Researchers and battery engineers can rely on its dependable dissolution kinetics, superior shear-thinning behavior, and robust film-forming characteristics to maximize energy density and cycle life in demanding electrochemical applications.

Key Features

• High Chemical Purity: Boasting a verified purity of 99.7% (exceeding the standard >99.5% specification), this powder minimizes unwanted side reactions and parasitic electrolyte decomposition within the negative electrode matrix.
• Optimized Viscosity Range: Exhibits a stable viscosity profile of 7,000–10,000 mPa·s in a 2% aqueous solution (measured at 7,458 mPa·s), providing excellent shear-thinning flow properties that optimize doctor-blade and slot-die coating uniformity.
• Controlled Degree of Substitution: Features a tightly managed substitution range of 0.6–0.9 (measured at 0.86), maximizing aqueous solubility, functional carboxyl group availability, and polymer chain flexibility.
• Ultra-Low Trace Metal Contamination: Contains strictly limited heavy metals (Pb <15 ppm, Fe <40 ppm, As <2 ppm), mitigating internal micro-short circuits, transition metal dissolution hazards, and accelerated cell self-discharge.
• Aqueous Processing Compatibility: Dissolves readily in deionized water, facilitating eco-friendly, green slurry mixing workflows that eliminate the environmental, health, and economic burdens of toxic N-Methyl-2-pyrrolidone (NMP) solvents.
• Exceptional Dispersion Stability: Functional carboxyl and hydroxyl groups form robust steric and electrostatic repulsion networks, preventing graphite and silicon nanoparticle agglomeration in high-solids slurries.
• Superior Current Collector Adhesion: Forms strong hydrogen bonds with copper foil substrates and conductive carbon additives, preventing active material delamination during calender roll pressing and repetitive charge-discharge cycling.
• Polysulfide Shuttle Mitigation: In advanced lithium–sulfur battery systems, the functional macromolecular network physically and chemically entraps soluble polysulfides, significantly suppressing the shuttle effect and boosting capacity retention.

Applications

Technical Specifications

Why Choose This Product

• Strict Battery-Grade Quality Control: Every batch undergoes comprehensive laboratory analytical screening to verify chemical purity, trace metal thresholds, and substitution degree, ensuring seamless reproducibility in high-precision research.
• Optimized Rheological Predictability: Carefully tuned polymer chain distribution ensures rapid aqueous dissolution without unmixed micro-gel clusters, guaranteeing stable viscosity under high-shear mixing and continuous high-speed coating.
• Enhanced Electrochemical Stability: Ultra-low inorganic and metallic impurities prevent unwanted catalytic side reactions and support the formation of a uniform, low-impedance solid electrolyte interphase (SEI) on negative electrodes.
• Comprehensive Process Integration: Engineered to work seamlessly alongside standard battery assembly equipment, slurry homogenizers, vacuum mixers, and roll-to-roll calendering presses.

Contact our technical sales team today to request a quotation, obtain batch certificates of analysis, or discuss bulk packaging and custom formulations tailored to your cell fabrication requirements.

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