ZnCo2O4/graphene@NF nanocomposites as high-capacity anode materials for lithium-ion batteries

Abstract

In this paper, a three-dimensional composite of ZnCo₂O₄/graphene@nickel foam (ZCO/G@NF) was prepared for lithium-ion battery anode. It eliminates the tedious steps of traditional coating and maintains a stable structure during charging and discharging, which is not easy to collapse. The binder-free electrode prevents agglomeration of nanosheets and accelerates the transfer efficiency of electrons and ions. As a lithium anode showing excellent cycling and multiplication performance, the discharge capacity can still reach 1128 mAh/g after 100 cycles at a current density of 0.1 A/g, and when the current reaches 1.4 A/g, it can still maintain a reversible capacity of 760mAh/g. The material has high reversible capacity, good cycling stability, and good multiplicity performance. Combining the advantages of self-supported structure, carbon composite, and nanomorphology design, the electrochemical performance of ZnCo₂O₄ is comprehensively improved.