US 12,113,205 B2
Negative electrode active material, negative electrode, and secondary battery
Naoki Hayashi, Kyoto (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed by MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed on Nov. 23, 2021, as Appl. No. 17/533,439.
Application 17/533,439 is a continuation of application No. PCT/JP2020/025340, filed on Jun. 26, 2020.
Claims priority of application No. 2019-118719 (JP), filed on Jun. 26, 2019.
Prior Publication US 2022/0085355 A1, Mar. 17, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/38 (2006.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/364 (2013.01) [H01M 4/366 (2013.01); H01M 4/386 (2013.01); H01M 4/587 (2013.01); H01M 4/624 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A negative electrode active material comprising
a plurality of first negative electrode active material particles each including:
a central portion including silicon; and
a covering portion provided on a surface of the central portion, the covering portion including a (meth)acrylic acid-based polymer and a compound having a siloxane bond,
wherein the (meth)acrylic acid-based polymer includes at least one of poly(meth)acrylate or a derivative of poly(meth)acrylic acid.