Sodium Carboxymethyl Cellulose For Battery Industry

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.

Application in graphite modification

With the good coating effect to the natural graphite, CMC can effectively improve its surface quality, inhibit the strong reduction reaction of electrolyte on the surface, prevent the solvation ion from being into the graphite layer leading to the structure delamination, enhance the electrochemistry property of the natural graphite, and effectively produce the exfoliation phenomenon in the process of charging or discharging of the graphite. Therefore, it effectively increases the circulation stability of the carbon composite and improve the battery stability and performance. CMC which is applied in graphite modification will show the effect as follows:

*The formed resin carbon can make the lithium ion diffuse to internal of the graphite through the resin carbon;

*Prevent the solvation and lithium ion from being embedded tog, and weaken the reduction reaction which the solvent molecule impacts on the electrode;

*Graphite circulation property is obviously increased after coating treatment, and effectively inhibit the capacity reduction of graphite;

*Effectively increase the retention rate of discharging platform and discharging capacity.