Bismuth germanate (Bi4Ge3O12), a promising high-capacity lithium-ion battery anode

Abstract

Cubic Bi₄Ge₃O₁₂ lithiation-host electrode material with micron size, low surface area (3 m² g⁻¹) and high tap density yielded a reversible capacity of 586 mA h g⁻¹ at a current density of 200 mA g⁻¹ after 500 charge–discharge cycles. Density functional theory calculations detected distorted [BiO₆]⁹⁻ octahedra with two types of Bi–O bonds.