ACTIVE MATERIAL, NONAQUEOUS ELECTROLYTE BATTERY, BATTERY PACK, AND VEHICLE

摘要

According to one embodiment, an active material including a monoclinic niobium-titanium composite oxide is provided. In the active material, a portion of niobium (Nb) or titanium (Ti) as a constituent element of Nb2TiO7 is substituted by an element. Here, the substitution of Nb or Ti satisfies any one of following formulas (1) to (3):;Ti(IV)→0.75M(V)+0.25M(I)  (1);Ti(IV)→0.6M(VI)+0.4M(I)  (2);Nb(V)→0.8M(VI)+0.2M(I)  (3),;where M(VI) is at least one of Mo and W, M(V) is at least one of Nb, Ta, and V, and M(I) is at least one of Na, K, Rb, and Cs.

主权项

1: An active material comprising a monoclinic niobium-titanium composite oxide in which a portion of niobium (Nb) or titanium (Ti) as a constituent element of Nb2TiO7 is substituted by an element such that any one of following formulas (1) to (3) is satisfied:
Ti(IV)→0.75M(V)+0.25M(I)  (1) Ti(IV)→0.6M(VI)+0.4M(I)  (2) Nb(V)→0.8M(VI)+0.2M(I)  (3), wherein M(VI) is at least one of Mo and W, M(V) is at least one of Nb, Ta, and V, and M(I) is at least one of Na, K, Rb, and Cs.