CPC H01M 4/62 (2013.01) [H01M 4/0402 (2013.01); H01M 4/364 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] | 23 Claims |
1. A negative electrode active material, comprising a core material and a polymer modified coating on at least part of a surface of the core material;
wherein the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material; and
wherein the negative electrode active material has a weight loss rate satisfying 0.2%≤weight loss rate≤2% in a thermogravimetric analysis test wherein temperature is elevated from 25° C. to 800° C. under a non-oxidizing inert gas atmosphere.
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