US 12,278,360 B2
Positive electrode and electricity storage device
Kazuki Saimen, Saitama (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Jan. 19, 2022, as Appl. No. 17/578,460.
Claims priority of application No. 2021-019737 (JP), filed on Feb. 10, 2021.
Prior Publication US 2022/0255058 A1, Aug. 11, 2022
Int. Cl. H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/485 (2010.01); H01M 4/58 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/364 (2013.01) [H01M 4/131 (2013.01); H01M 4/485 (2013.01); H01M 4/5825 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 4 Claims
 
1. A positive electrode comprising: a positive electrode current collector; and a positive electrode material mixture layer,
the positive electrode material mixture layer comprising a positive electrode active material and dielectric particles,
a content of the dielectric particles being 1% by mass or more and 5% by mass or less,
the dielectric particles including ionically-conductive particles and non-ionically-conductive particles, a content of the non-ionically-conductive particles being 2% by mass or more and 50% by mass or less, a content of the ionically-conductive particles being 50% by mass or more and 98% by mass or less,
the ionically-conductive particles being Li0.33La0.55TiO3 particles, LiNbO3 particles, or Li3PO4 particles, having a relative permittivity of 30 or more, and
the non-ionically-conductive particles being BaTi1-xZrxO3 (0≤X≤0.5), having a relative permittivity of 30 or more.