US 12,444,772 B2
Solid-state battery
Koichi Nakano, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Sep. 15, 2021, as Appl. No. 17/475,906.
Application 17/475,906 is a continuation of application No. PCT/JP2020/006608, filed on Feb. 19, 2020.
Claims priority of application No. 2019-061573 (JP), filed on Mar. 27, 2019.
Prior Publication US 2022/0006127 A1, Jan. 6, 2022
Int. Cl. H01M 10/0585 (2010.01); H01M 4/13 (2010.01); H01M 10/0525 (2010.01); H01M 50/531 (2021.01); H01M 50/543 (2021.01); H01M 50/586 (2021.01); H01M 50/59 (2021.01)
CPC H01M 10/0585 (2013.01) [H01M 4/13 (2013.01); H01M 10/0525 (2013.01); H01M 50/531 (2021.01); H01M 50/543 (2021.01); H01M 50/586 (2021.01); H01M 50/59 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A solid-state battery comprising:
a solid-state battery laminate having at least one battery constituent unit including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer along a stacking direction;
a positive electrode terminal on a first side surface of the solid-state battery laminate; and
a negative electrode terminal on a second side surface of the solid-state battery laminate, wherein
the positive electrode layer and the negative electrode layer each include a terminal contact portion and a non-terminal contact portion other than the terminal contact portion, wherein the terminal contact portion of the positive electrode layer is in direct contact with the positive electrode terminal and the terminal contact portion of the negative electrode layer is in direct contact with the negative electrode terminal,
in at least one of the positive electrode layer and the negative electrode layer, an active material density of the terminal contact portion is smaller than an active material density of the non-terminal contact portion,
in the at least one of the positive electrode layer and the negative electrode layer, the terminal contact portion is made of an electrode material which is a same kind as an electrode material of the non-terminal contact portion and has a smaller active material density than the electrode material of the non-terminal contact portion, and
in the at least one of the positive electrode layer and the negative electrode layer, a density ratio of the electrode material of the terminal contact portion to the non-terminal contact portion is 0.1 to 0.5.