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

Abstract

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 Bi₁₃S₁₈I₂ achieved an initial capacity value of 807 mA h g⁻¹, while those with BiSI/Bi₁₃S₁₈I₂ a value of 1087 mA h g⁻¹ in lithium-ion battery systems.