Patent ID: 9570752
Date: 2017-02-14
CPC Classifications: H01M,Y02E

Claim:
1. A negative electrode material, comprising: an active material present in an amount ranging from about 60 wt % to about 95 wt % of a total wt % of the negative electrode material, wherein the active material includes carbon coated silicon, carbon coated silicon alloy, or a combination thereof, and wherein the active material has a diameter ranging from about 30 nm to less than 1000 nm; a polyimide binder present in an amount ranging from about 1 wt % to about 20 wt % of the total wt % of the negative electrode material, wherein a backbone structure of each repeating unit of the polyimide binder has no ether group present and no more than one carbonyl group present; and a conductive filler present in an amount ranging from about 3 wt % to about 20 wt % of the total wt % of the negative electrode material.