WO3 /CoWO4 /rGO high porosity anode electrode materials based on ZIF-67 framework

Abstract In this work, the high porosity of ZIF-67 frame was used to increase the infiltration degree of electrolyte, improve the diffusion rate of ions and inhibit the volume expansion of WO₃/CoWO₄ during the cycling process. The high conductivity of rGO was used to make up for the lack of conductivity of composite materials. At the current density of 100 mA g⁻ ¹, 507.8 mAh g⁻ ¹ specific capacity was retained after 100 cycles and 248.3 mAh g⁻ ¹ specific capacity was retained after 300 cycles at the current density of 800 mA g⁻ ¹.