Boosting the lithium storage capability of Li+-conductor LiInGeO4 through intrinsic and extrinsic conductivity optimization

Abstract

Olivine-structured LiInGeO₄, a Li⁺ conductor isotypic with LiFePO₄ and originally intended as a solid electrolyte, is purposed as a high-capacity conversion-alloying anode. Its poor electronic conductivity is regulated by synergistic Ru doping and conformal graphene hybridization. The anode delivers 1058.8 mAh g⁻¹ after 100 cycles at 0.1 A g⁻¹ and 412.8 mAh g⁻¹ at 10 A g⁻¹, establishing a new paradigm for fast-charging anodes derived from Li⁺-conductors.