Kabushiki Kaisha Toshiba

Kakuya Ueda

Norio Takami

Yasuhiro Harada

Keigo Hoshina

Shinsuke Matsuno

Tetsuya Sasakawa

Yasunobu Yamashita

Yorikazu Yoshida

According to one embodiment, provided is an air battery including a negative electrode, an air electrode to which oxygen is supplied, a solid electrolyte layer positioned between the negative electrode and the air electrode, an aqueous electrolyte layer positioned between the solid electrolyte layer and the air electrode, and a proton conduction layer positioned between the aqueous electrolyte layer and the air electrode. The aqueous electrolyte layer includes an aqueous electrolyte including a polyprotic acid having two or more carboxyl groups, an electrolyte salt, and water.

Air battery

According to one embodiment, an active material is provided. The active material includes an NbTiOphase and at least one Nb-rich phase selected from the group consisting of an NbTiOphase, an NbTiOphase, and an NbTiOphase. The active material includes potassium and phosphorus, and a total concentration of potassium and phosphorus in the active material is in the range of 0.01% by mass to 5.00% by mass. An average crystallite diameter is in the range of 80 nm to 150 nm. In a particle size distribution chart obtained by a laser diffraction scattering method, D10 is 0.3 μm or greater, and D90 is 10 μm or less. The active material satisfies a peak intensity ratio represented by the following Formula (1).0<≤0.25  (1)

Active material, electrode, secondary battery, battery pack, and vehicle

According to one embodiment, an electrode is provided. The electrode includes a current collector, and an active material-containing layer which is formed on a surface of the current collector and includes a plurality of niobium titanium composite oxide particles. A X-ray diffraction pattern using a Cu-Kα ray source with respect to a surface of the active material-containing layer includes a peak A with a highest intensity in a range of 2θ=26°±0.2° and a peak B with a highest intensity in a range of 2θ=23.9°±0.2°. An intensity ratio (Ia/Ib) between an intensity Ia of the peak A and an intensity Ib of the peak B is in a range of 1.80 or more to 2.60 or less.

Electrode, secondary battery, battery pack and vehicle

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Yokohama, Japan

Kakuya Ueda