All-solid-state lithium ion secondary battery
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMitsutoshi Otaki, Norihiro Ose, Shigenori Hama, Kazuyuki Taniguchi, Yoshiyasu Yamada, Tetsuo Nakanishi
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Abstract
Disclosed is an all-solid-state lithium ion secondary battery excellent in cycle characteristics. The battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises anode active material particles, an electroconductive material and a solid electrolyte; wherein the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO; and wherein a BET specific surface area of the anode active material particles is 1.9 m2/g or more and 14.2 m2/g or less.
Claims11
An all-solid-state lithium ion secondary battery comprising an anode, the anode comprising:
- anode active material particles;
- an electroconductive material;
- and
- a solid electrolyte;
- wherein:
- the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO,
- the anode active material particles have a mean diameter D50 in the range of from 2.4 μm to 6.0 μm,
- a BET specific surface area (S) of the anode active material particles is 1.9 m2/g or more and 14.2 m2/g or less, and
- a C/S value is 0.18 or more and 6.03 or less, wherein:
- C/S value=a volume percentage (%) of the electroconductive material (C) in the anode /the BET specific surface area (S).
Dependencies are inferred from the claim text.