ACTIVE MATERIAL, NONAQUEOUS ELECTROLYTE BATTERY, AND BATTERY PACK

摘要

According to an embodiment, provided is an active material including monoclinic niobium titanium composite oxide particles and a carbon material layer. The monoclinic niobium titanium composite oxide particles absorb and/or emit Li ions or Na ions, and satisfy Equation (1). The carbon material layer covers at least some of the surface of the niobium titanium composite oxide particles, and satisfies Equation (2). 0.5 <= (α/β) <= 2 (1), 0 <= (γ/σ) <= 0.1 (2).