US 12,191,472 B2
Electrode structure and non-aqueous electrolyte secondary battery
Kazuhiro Yoshii, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 16/973,622
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 22, 2019, PCT No. PCT/JP2019/006875
§ 371(c)(1), (2) Date Dec. 9, 2020,
PCT Pub. No. WO2020/003605, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 2018-122882 (JP), filed on Jun. 28, 2018.
Prior Publication US 2021/0249642 A1, Aug. 12, 2021
Int. Cl. H01M 4/131 (2010.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 10/0525 (2010.01); H01M 50/409 (2021.01); H01M 50/489 (2021.01)
CPC H01M 4/0435 (2013.01) [H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 50/409 (2021.01); H01M 50/489 (2021.01)] 10 Claims
OG exemplary drawing
 
1. A non-aqueous electrolyte secondary battery comprising:
a positive electrode;
a negative electrode;
a heat-resistant layer formed on at least any one of the positive electrode and the negative electrode; and
a non-aqueous electrolyte; wherein
the heat-resistant layer includes heat-resistant particles having at least a surface including a metal compound,
the heat-resistant layer has an average thickness in the range of 0.5 μm to 5 μm, the heat-resistant layer has a porosity of 25% to 55%, the heat-resistant layer has an average surface roughness (Ra) of 0.35 μm or less,
metal ions in the metal compound have an electronegativity of 13.5 or more, and
a plurality of exposed portions in which an electrode located under the heat-resistant layer is partially exposed are present on a surface of the heat-resistant layer, and a maximum length for each of the exposed portions is 3 μm or more and 30 μm or less.