US 11,728,484 B2
Non-aqueous electrolyte secondary battery
Fumikazu Mizukoshi, Tokushima (JP); Takamitsu Tashita, Tokushima (JP); and Takuya Shinomiya, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 15/734,025
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jun. 4, 2019, PCT No. PCT/JP2019/022065
§ 371(c)(1), (2) Date Dec. 1, 2020,
PCT Pub. No. WO2019/239948, PCT Pub. Date Dec. 19, 2019.
Claims priority of application No. 2018-114646 (JP), filed on Jun. 15, 2018.
Prior Publication US 2021/0226213 A1, Jul. 22, 2021
Int. Cl. H01M 4/587 (2010.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/587 (2013.01) [H01M 4/364 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A non-aqueous electrolyte secondary battery comprising a negative electrode having a negative electrode active material layer, the negative electrode active material layer including graphite particles A and graphite particles B each as a negative electrode active material,
wherein the graphite particles A have a porosity due to closed pores of 1% to 5%, and the graphite particles B have a porosity due to closed pores of 8% to 15%, and
a mass ratio between the graphite particles A and the graphite particles B is 70:30 to 90:10.