US 12,444,773 B2
All-solid battery
Hiroshi Tsubouchi, Nagoya (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Nov. 3, 2021, as Appl. No. 17/518,077.
Claims priority of application No. 2020-190815 (JP), filed on Nov. 17, 2020.
Prior Publication US 2022/0238922 A1, Jul. 28, 2022
Int. Cl. H01M 10/0585 (2010.01); H01M 4/02 (2006.01); H01M 4/38 (2006.01); H01M 10/052 (2010.01)
CPC H01M 10/0585 (2013.01) [H01M 4/386 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2220/20 (2013.01); H01M 2300/0065 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An all-solid battery comprising:
a cathode layer;
an anode layer; and
a solid electrolyte layer formed between the cathode layer and the anode layer, wherein
the anode layer contains a Si-based active material,
the Si-based active material comprises a plurality of secondary particles each having a plurality of primary particles, and
when a sum of void volume inside the primary particles included in an individual secondary particle of the plurality of secondary particles is set to VV1 and a sum of void volume between the plurality of the primary particles included in the individual secondary particle is set to VV2, a ratio of the VV1 to the VV2 calculated by VV1/VV2 is 0.8 or more and 5 or less.