“…In addition, using precious metals (Cr) for synthesizing complex titanate anode materials was more dangerous to humans and organisms than using TiO 2 (B) precursors because the metal was harmful to the skin, eyes, blood, and respiratory system, was a human carcinogen and could cause biodiversity loss , and also environmental pollution . However, the specific capacity of TiO 2 (B) is moderate, and the development of electrochemical properties in TiO 2 (B) anode materials can be improved by fabricating TiO 2 (B) with many composite materials, such as alloying (Si, − Sn, Sb, , Ge, , etc.) and conversion of anode materials (metal oxide, − metal nitride, metal sulfide, , etc.).…”