US 11,670,756 B2
Negative electrode for secondary battery, secondary battery, and manufacturing methods thereof
Hiroshi Nishihara, Tokyo (JP); Mariko Miyachi, Tokyo (JP); and Masaharu Sato, Tokyo (JP)
Assigned to THE UNIVERSITY OF TOKYO, Tokyo (JP)
Appl. No. 16/761,150
Filed by THE UNIVERSITY OF TOKYO, Tokyo (JP)
PCT Filed Oct. 31, 2018, PCT No. PCT/JP2018/040430
§ 371(c)(1), (2) Date May 1, 2020,
PCT Pub. No. WO2019/088139, PCT Pub. Date May 9, 2019.
Claims priority of application No. JP2017-213147 (JP), filed on Nov. 2, 2017.
Prior Publication US 2020/0259165 A1, Aug. 13, 2020
Int. Cl. H01M 4/1395 (2010.01); H01M 4/04 (2006.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01)
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
OG exemplary drawing
 
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.