In situ synthesis of V2O3 nanorods anchored on reduced graphene oxide as high-performance lithium ion battery anode

摘要

The potential applications of V2O3 in lithium ion batteries (LIBs) are significantly hampered by the comparatively poor rate performance as well as fast capacity decay due to the low electrical conductivity and huge volume change during cycling process. Various strategies have been proposed to address these drawbacks. Among different methods, reducing their particle size to the nanometer range and combining with carbonaceous matrix seem to be effective ways to improve electrochemical property. Herein, we prepared V2O3 nanorods in-situ adhered to rGO via hydrothermal reaction and heattreatment. One dimensional V2O3 nanorods combined with rGO can effectively shorten Li+ ions and electrons transport path, improve electrical conductivity and alleviate volume change. The strong chemical interaction between them would remarkably accelerate charge transfer. These features endow V2O3/rGO composite with good cycling stability (675 mA h g~(-1) after 300 cycles at 500 mAg~(-1)) and excellent rate performance (428 mAg h~(-1) at 2000 mAg~(-1)). New prospects will be brought by this work for the potential application of V2O3 based material as advanced anode material for LIBs.