US 11,916,188 B2
All solid battery and manufacturing method of the same
Sachie Tomizawa, Tokyo (JP); Daigo Ito, Tokyo (JP); Chie Kawamura, Tokyo (JP); Masashi Sekiguchi, Tokyo (JP); and Takato Satoh, Tokyo (JP)
Assigned to TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed by TAIYO YUDEN CO., LTD., Tokyo (JP)
Filed on Mar. 18, 2020, as Appl. No. 16/822,394.
Claims priority of application No. 2019-064647 (JP), filed on Mar. 28, 2019.
Prior Publication US 2020/0313233 A1, Oct. 1, 2020
Int. Cl. H01M 10/0562 (2010.01); H01M 4/133 (2010.01); H01M 4/02 (2006.01)
CPC H01M 10/0562 (2013.01) [H01M 4/133 (2013.01); H01M 2004/021 (2013.01); H01M 2300/0008 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An all solid battery comprising:
a solid electrolyte layer including a glass component, a main component of the solid electrolyte layer being phosphoric acid salt-based solid electrolyte; and
electrode layers that are provided on both main faces of the solid electrolyte layer,
wherein the electrode layers include an electrode active material and a carbon material, the electrode active material being different from the carbon material, the carbon material acting as a conductive auxiliary agent and having an average particle diameter of 40 nm or more and 120 nm or less,
wherein a DBP oil absorption of the carbon material is 200 mL/100 g or less,
wherein a ratio of the carbon material in the electrode layers is 5 vol % or more and 60 vol % or less,
wherein the electrode active material of one of the electrode layers has the same chemical composition as that of the other of the electrode layers,
wherein the solid electrolyte layer and the electrode layers have a sintered structure, and
wherein when a true density of the solid electrolyte before sintering is 100%, a density degree of only the solid electrolyte of the sintered structure is 90% or more, and an electrical conductivity (S/cm) of the sintered structure is 0.1 or more.