ZnOHF/N-doped carbon hybrids as a novel anode material for enhanced lithium storage

Abstract

Multicomponent transition metal compounds (TMCs) composed of many cations and anions have aroused widespread concern on account of their excellent electrochemical properties. Herein, the ZnOHF nanorod anchored to honeycomb-like N-doped porous carbon composite was successfully prepared through a hydrothermal method and used as a novel anode material in lithium-ion batteries (LIBs) for the first time. The specific structure can effectively improve the electronic conductivity, promote electrolyte penetration and accelerate lithium-ion diffusion. Therefore, the ZnOHF/N-C composite exhibits excellent initial discharge capacity (946.8 mAh g−1), high initial coulombic efficiency (ICE, 87.3%) and excellent cyclability (1050.2 mAh g−1 after 430 cycles). What's more, due to the high capacitance contribution of ZnOHF/N-C electrode, it has outstanding rate capability. This study provides a novel idea for the design of multi-component transition metal compound anode materials for LIBs.