Bismuth-based mixed-anion compounds for anode materials in rechargeable batteries.

A facile solvothermal synthesis approach for chemical composition control in ternary Bi-S-I systems is reported by simply controlling the sulfide concentration. We demonstrate the application of these bismuth-based ternary mixed-anion compounds as high capacity anode materials in rechargeable batteries. Cells utilising Bi ₁₃ S ₁₈ I ₂ achieved an initial capacity value of 807 mA h g ^-1 , while those with BiSI/Bi ₁₃ S ₁₈ I ₂ a value of 1087 mA h g ^-1 in lithium-ion battery systems.