Toyota Jidosha Kabushiki Kaisha

Hideyuki Nakano

Jun Yoshida

Daichi Kosaka

Takamasa Otomo

Tetsuya Waseda

A main object of the present disclosure is to provide a battery with excellent capacity. The present disclosure achieves the object by providing a battery comprising a cathode layer, an electrolyte layer, and an anode layer, in this order, and the anode layer includes a silicon clathrate compound, as an anode active material, the silicon clathrate compound has a composition represented by MSi, wherein M is a metal element, x satisfies 0&#x3c;x&#x3c;46, and includes a crystal phase of a Type I silicon clathrate, and an average primary particle size of the silicon clathrate compound is 50 nm or more and 3000 nm or less.

Battery

A main object of the present disclosure is to provide a novel active material whose volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material having a composition represented by NaMSi, wherein M is a metal element other than Na, x and y satisfy 0&#x3c;x, 0&#x2264;y, y&#x2264;x and 0&#x3c;x+y&#x3c;8, and comprising a crystal phase of a Type I silicon clathrate.

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Nagakute, Japan

Hideyuki Nakano