CMC negative electrode binder

Core function \ (in the negative electrode system) 

Dispersant (Core) 

In the aqueous solution, it dissociates into –COO⁻. Through electrostatic repulsion and steric hindrance, the hydrophobic graphite/silicon carbide particles are uniformly dispersed to prevent agglomeration and sedimentation, ensuring the homogeneity of the slurry. 

Thickening agent (core) 

Significantly increase the viscosity of the slurry, adjust the rheological properties, be suitable for high-speed coating, and prevent uneven thickness of the electrode sheet, pinholes and run-off. 

Bonding assistance and interface stability 

–COO⁻/–OH forms strong hydrogen bonds and ionic bonds with the hydroxyl groups on graphite/silicon surfaces, enhancing the adhesion between particles and between particles and copper foil; it stabilizes the electrode structure during cycling and inhibits the peeling of the graphite layer and the side reactions with the electrolyte. 

Electrochemical stability 

Resistant to electrolyte swelling, it does not decompose or swell under the working electrode potential of the negative electrode (0.01–1.5 V vs Li/Li⁺), and maintains long-term mechanical strength.