US 12,244,009 B2
Non-aqueous electrolyte rechargeable battery
Yasunobu Kawamoto, Osaka (JP); and Masahiro Kinoshita, Tokushima (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/430,083
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 21, 2020, PCT No. PCT/JP2020/007021
§ 371(c)(1), (2) Date Aug. 11, 2021,
PCT Pub. No. WO2020/175360, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-035633 (JP), filed on Feb. 28, 2019.
Prior Publication US 2022/0140335 A1, May 5, 2022
Int. Cl. H01M 4/525 (2010.01); H01M 4/02 (2006.01); H01M 4/505 (2010.01)
CPC H01M 4/525 (2013.01) [H01M 4/505 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte, the positive electrode including a positive electrode current collector and a positive electrode mixture layer located on the positive electrode current collector,
wherein the positive electrode mixture layer includes a lithium complex oxide in a form of secondary particles, each of the secondary particles being agglomerated primary particles, and
the secondary particles include a secondary particle in which a coarse primary particle having a particle size larger than d+6σ is present, wherein d represents an average value of particle sizes of the primary particles and σ represents a standard deviation of a particle size distribution of the primary particles, wherein particle size is defined as a length of the primary particle in the major axis direction.