Anode active material
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsSatoshi Wakasugi, Jun Yoshida
Life of this patent
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Abstract
Provided is an anode active material configured to achieve both an increase in the coulombic efficiency during initial charge and discharge of an all-solid-state battery, and suppression of an increase in the resistance of the all-solid-state battery. The anode active material may be an anode active material, wherein the anode active material is an anode active material for use in all-solid-state batteries; wherein the anode active material comprises a lithium-silicon alloy and elemental silicon; and wherein the anode active material has peaks at positions of 2θ=20.2°±0.5°, 23.3°±0.5°, 40.5°±0.5°, and 46.0°±0.5° in a XRD spectrum obtained by XRD measurement using CuKα radiation.
Claims14
An anode material mixture consisting of:
- (A) lithium-silicon alloy,
- (B) elemental silicon, and
- (C) at least one of a binder, a solid electrolyte, an electroconductive material, or a solvent,
- wherein the anode material mixture is configured for use in all-solid-state batteries;
- wherein the anode material has peaks at positions of 2θ=20.2°±0.5°, 23.3°±0.5°, 40.5°±0.5°, and 46.0°±0.5° in a XRD spectrum obtained by XRD measurement using CuKα radiation;
- wherein, when the anode material mixture has the electroconductive material, the electroconductive material is vapor grown carbon fiber;
- and
- wherein, when a total of a molar amount of the lithium-silicon alloy and that of the elemental silicon is considered to be 100 mol %, a molar ratio of the lithium-silicon alloy to the elemental silicon is from 1.0:99 to 65:35.
Dependencies are inferred from the claim text.