Active material, nonaqueous electrolyte battery, battery pack and vehicle

Abstract

According to one embodiment, there is provided an active material. The active material includes secondary particles. The secondary particles include first primary particles and second primary particles. The first primary particles include an orthorhombic Na-containing niobium-titanium composite oxide. The second primary particles include at least one selected from the group consisting of a carbon black, a graphite, a titanium nitride, a titanium carbide, a lithium titanate having a spinel structure, a titanium dioxide having an anatase structure, and a titanium dioxide having a rutile structure.

Description

technical field [0001] Embodiments of the present invention relate to an active material for batteries, a nonaqueous electrolyte battery, and a battery pack. Background technique [0002] Non-aqueous electrolyte batteries, in which lithium ions are charged and discharged by moving between the negative electrode and the positive electrode, have been extensively researched as high-energy-density batteries. [0003] This non-aqueous electrolyte battery is expected to be used as a large and medium-sized power source such as in-vehicle use and stationary use, in addition to its use as a power source for small electronic devices. In such large and medium-sized applications, non-aqueous electrolyte batteries are required to have life characteristics and high safety. In addition, high input-output characteristics of the non-aqueous electrolyte battery are also required. [0004] An example of a nonaqueous electrolyte battery having life characteristics and high safety includes a n...

AI Technical Summary

Problems solved by technology

However, since the titanium composite oxide itself has low electron conductivity, it is considered to coat the titanium composite oxide with carbon or use a non-aqueous electrolyte with high lithium ion conductivity in order to obtain high input and output characteristics.

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