US Patent 10056615 Active substance, nonaqueous electrolyte battery, and battery pack

According to one embodiment, there is provided an active substance. The active substance includes particles of niobium titanium composite oxide and a phase including a carbon material. The niobium titanium composite oxide is represented by Ti1−xM1xNb2−yM2yO7. The phase is formed on at least a part of the surface of the particles. The carbon material shows, in a Raman chart obtained by Raman spectrometry, a G band observed at from 1530 to 1630 cm−1 and a D band observed at from 1280 to 1380 cm−1. A ratio IG/ID between a peak intensity IG of the G band and a peak intensity ID of the D band is from 0.8 to 1.2.