Kabushiki Kaisha Toshiba

Fumihiro Tejima

Norio Takami

Yasuhiro Harada

Keigo Hoshina

Kazuki Ise

Yorikazu Yoshida

According to one embodiment, an active material is provided. This active material includes active material particles containing orthorhombic Na-containing niobium titanium composite oxide, and satisfies the following formula (1):1&#x2264;5/0&#x2003;&#x2003;(1)

Active material, nonaqueous electrolyte battery, battery pack, and vehicle

According to one embodiment, there is provided an active material including particles of a composite oxide having an orthorhombic crystal structure and represented by the general formula LiNaM1TiM2O. The particles of the composite oxide have an average crystallite size of 50 nm to 90 nm and an average primary particle size of 0.1 &#x3bc;m to 0.6 &#x3bc;m. M1 is at least one selected from the group consisting of Cs and K. M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Y, Co, Mn, and Al. w falls within 0&#x2264;w&#x2264;4, x falls within 0&#x3c;x&#x3c;2, y falls within 0&#x2264;y&#x3c;2, z falls within 0&#x3c;z&#x3c;6, and &#x3b4; falls within &#x2212;0.5&#x2264;&#x3b4;&#x2264;0.5.

Growing community of inventors

Kawasaki, Japan

Fumihiro Tejima