US 12,407,024 B2
Non-aqueous electrolyte secondary cell
Atsushi Kaiduka, Osaka (JP); and Yasuyuki Takai, Osaka (JP)
Assigned to PANASONIC ENERGY CO., LTD., Osaka (JP)
Appl. No. 17/781,814
Filed by SANYO Electric Co., Ltd., Kadoma (JP)
PCT Filed Nov. 25, 2020, PCT No. PCT/JP2020/043707
§ 371(c)(1), (2) Date Jun. 2, 2022,
PCT Pub. No. WO2021/111930, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. JP2019-221682 (JP), filed on Dec. 6, 2019.
Prior Publication US 2023/0006256 A1, Jan. 5, 2023
Int. Cl. H01M 10/0568 (2010.01); H01M 4/04 (2006.01); H01M 4/38 (2006.01); H01M 4/583 (2010.01); H01M 10/0569 (2010.01); H01M 4/02 (2006.01)
CPC H01M 10/0568 (2013.01) [H01M 4/0404 (2013.01); H01M 4/386 (2013.01); H01M 4/583 (2013.01); H01M 10/0569 (2013.01); H01M 2004/027 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A non-aqueous electrolyte secondary battery comprising: a positive electrode; a negative electrode; and a non-aqueous electrolyte solution, wherein
the negative electrode includes a negative electrode current collector and a negative electrode active material layer provided on the negative electrode current collector,
the negative electrode active material layer contains graphite particles A and graphite particles B as a negative electrode active material,
an internal porosity of the graphite particles A is 5% or less, and an internal porosity of the graphite particles B is 12% to 16%,
the graphite particles A are contained more in a half region on an outer surface side of the negative electrode active material layer than in a half region on a negative electrode current collector side of the negative electrode active material layer when the negative electrode active material layer is divided into two equal parts in a thickness direction, and
the non-aqueous electrolyte solution contains a Li imide salt.