US 12,334,507 B2
Solid-state secondary battery
Shunpei Yamazaki, Tokyo (JP); Kazutaka Kuriki, Kanagawa (JP); Yumiko Yoneda, Kanagawa (JP); and Ryota Tajima, Kanagawa (JP)
Assigned to Semiconductor Energy Laboratory Co., Ltd., Atsugi (JP)
Appl. No. 17/606,839
Filed by SEMICONDUCTOR ENERGY LABORATORY CO., LTD., Atsugi (JP)
PCT Filed Apr. 17, 2020, PCT No. PCT/IB2020/053637
§ 371(c)(1), (2) Date Oct. 27, 2021,
PCT Pub. No. WO2020/222067, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 2019-087101 (JP), filed on Apr. 30, 2019.
Prior Publication US 2022/0216524 A1, Jul. 7, 2022
Int. Cl. H01M 10/0562 (2010.01); H01M 4/13 (2010.01); H01M 4/48 (2010.01); H01M 10/0525 (2010.01); H01M 10/0585 (2010.01); H01M 4/02 (2006.01)
CPC H01M 10/0585 (2013.01) [H01M 4/13 (2013.01); H01M 4/483 (2013.01); H01M 10/0525 (2013.01); H01M 10/0562 (2013.01); H01M 2004/021 (2013.01); H01M 2300/0071 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A solid-state secondary battery comprising:
a first film that has a function of releasing and accumulating a lithium ion;
a second film that has a function of transporting a lithium ion and is over the first film; and
a third film that has a function of releasing and accumulating a lithium ion and is over the second film,
wherein the first film expands and the third film contracts while a total thickness of the first to third films is maintained in a charge period,
wherein the second film comprises silicon and oxygen,
wherein an atomic ratio between silicon and oxygen (O/Si) in the second film is higher than 0 and lower than 2, and
wherein the oxygen is contained in a largest atomic concentration in the second film and silicon is contained in a second largest atomic concentration in the second film.
 
8. A solid-state secondary battery comprising:
a first film that has a function of releasing and accumulating a lithium ion and is over a negative electrode current collector layer;
a second film that has a function of transporting a lithium ion and is over the first film;
a third film that has a function of releasing and accumulating a lithium ion and is over the second film; and
a positive electrode current collector layer over the third film,
wherein a thickness between the negative electrode current collector layer and the positive electrode current collector layer is the same before and after charging,
wherein the second film comprises silicon and oxygen,
wherein an atomic ratio between silicon and oxygen (O/Si) in the second film is higher than 0 and lower than 2, and
wherein the oxygen is contained in a largest atomic concentration in the second film and silicon is contained in a second largest atomic concentration in the second film.