Abstract
Exploiting lithium-ion batteries (LIBs) with high reversible capacity and excellent durability at large current density is recognized as a promising strategy for energy storage. In this work, the ZnCo2O4/graphene aerogel (ZnCo2O4/GA) composite was fabricated through a facile hydrothermal process and evaluated as the anode in lithium-ion batteries. Due to the excellent conductivity of graphene, the ZnCo2O4/GA and ZnCo2O4/reduced graphene oxide (ZnCo2O4/rGO) endow superior specific capacity and durability than pure ZnCo2O4. More importantly, ZnCo2O4 cubes were confined geometrically into a three-dimensional (3D) graphene aerogel structure in the composite, which is beneficial to accommodate the volume change and enhances the mechanical strength of composites. Thus, ZnCo2O4/GA exhibits superior durability than ZnCo2O4/rGO at 1 A g-1. This work confirms the essential effect and directly reveals the merit of 3D framework structure for enhancing the performance of LIBs at the high current density, and provides a feasible strategy to design advanced electrodes for energy conversion.
Published Version
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