CPC H01M 4/133 (2013.01) [H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 4/1391 (2013.01); H01M 4/1393 (2013.01); H01M 4/1395 (2013.01); H01M 4/622 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] | 16 Claims |
1. A negative electrode active material comprising secondary particles comprising a plurality of primary particles coated with an amorphous carbon coating layer,
wherein the primary particles comprise silicon composite primary particles represented by Mg—SiOx (0<x<2) and artificial graphite primary particles, and
a BET surface area of the artificial graphite primary particles is 0.4 to 5 m2/g.
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