US 12,191,440 B2
Nonaqueous secondary battery
Shunpei Yamazaki, Tokyo (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken (JP)
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
Filed on Aug. 1, 2023, as Appl. No. 18/228,732.
Application 18/228,732 is a continuation of application No. 16/914,772, filed on Jun. 29, 2020, granted, now 11,769,902.
Application 16/914,772 is a continuation of application No. 14/537,989, filed on Nov. 11, 2014, granted, now 10,727,465, issued on Jul. 28, 2020.
Claims priority of application No. 2013-236697 (JP), filed on Nov. 15, 2013.
Prior Publication US 2023/0387451 A1, Nov. 30, 2023
Int. Cl. H01M 10/0525 (2010.01); H01M 50/119 (2021.01); H01M 50/126 (2021.01); H01M 50/449 (2021.01); H01M 50/457 (2021.01)
CPC H01M 10/0525 (2013.01) [H01M 50/449 (2021.01); H01M 50/457 (2021.01); H01M 50/119 (2021.01); H01M 50/126 (2021.01); Y02T 10/70 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A nonaqueous secondary battery comprising:
a positive electrode;
a negative electrode; and
a stacked-layer structure between the positive electrode and the negative electrode, the stacked-layer structure including a first separator and a second separator,
wherein the first separator is over the positive electrode,
wherein the second separator is over and in contact with the first separator,
wherein the first separator includes a first pore,
wherein the second separator includes a second pore,
wherein a size of the second pore is smaller than a size of the first pore, and
wherein the first separator comprises cellulose.