US 12,266,803 B2
Secondary battery negative electrode, secondary battery, and manufacturing method of secondary battery negative electrode
Suguru Noda, Tokyo (JP); Keisuke Hori, Tokyo (JP); Tomotaro Mae, Tokyo (JP); and Yuta Hashizume, Tokyo (JP)
Assigned to WASEDA UNIVERSITY, Tokyo (JP); and ZEON CORPORATION, Tokyo (JP)
Appl. No. 17/430,569
Filed by WASEDA UNIVERSITY, Tokyo (JP); and ZEON CORPORATION, Tokyo (JP)
PCT Filed Feb. 25, 2020, PCT No. PCT/JP2020/007518
§ 371(c)(1), (2) Date Aug. 12, 2021,
PCT Pub. No. WO2020/175488, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-033081 (JP), filed on Feb. 26, 2019.
Prior Publication US 2022/0140351 A1, May 5, 2022
Int. Cl. H01M 4/80 (2006.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 10/052 (2010.01); H01M 10/054 (2010.01)
CPC H01M 4/808 (2013.01) [H01M 4/134 (2013.01); H01M 4/38 (2013.01); H01M 4/381 (2013.01); H01M 4/382 (2013.01); H01M 4/62 (2013.01); H01M 4/663 (2013.01); H01M 10/052 (2013.01); H01M 10/054 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A secondary battery negative electrode, comprising:
a three-dimensional current collector formed of a self-supporting sponge-like structure of carbon nanotubes;
a metal active material contained inside pores of the self-supporting sponge-like structure; and
a plurality of seed particles contained inside the pores of the self-supporting sponge-like structure, dispersed throughout the self-supporting sponge-like structure, and made of a material different from the metal active material, wherein
the number of the plurality of seed particles per electrode area is 1×108/cm2 or more, and
the secondary battery negative electrode does not include a foil of the metal active material.