CPC H01M 4/1395 (2013.01) [H01M 4/0452 (2013.01); H01M 4/622 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] | 14 Claims |
1. A negative electrode for a secondary battery comprising:
a negative electrode active material layer including at least a silicon-based active material and a binder; and
a negative electrode current collector,
the silicon-based active material having an amorphous region including lithium, and
island-shaped lithium carbonate forming a closed boundary being distributed in the amorphous region.
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