▎ 摘　　要

Few layers graphene nanosheets (GS) are obtained by the reduction of graphite oxide (GO) via Lithium aluminium tetrahydride (LiAlH4) and Phosphorus tribromide (PBr3) as the deoxidizer. The LiFePO4/GS composite is prepared using a solution phase method followed by a calcination process with only 2h at 600 degrees C. The effect of the GS content in LiFePO4/GS on the morphology and electrochemical performance of LiFePO4 particles is extensively investigated. Results show that the optimized amount of GS in LiFePO4/GS is 5%. The primary particle size of LiFePO4/5%GS is 100 similar to 150 nm which are wrapped and connected homogeneously and loosely by GS with similar to 4 layers. The GS can restrict the growth of LiFePO4 particle and construct an effective conductive network LiFePO4/GS composite, which all can enhance the conductivity of LiFePO4 particle. The LiFePO4/5%GS composite delivers a capacity of 155.4 mAhg(-1) at 0.2 degrees C, which is much higher than pure LiFePO4 (125.3 mAhg(-1)). Even at high rate of 5 degrees C, a specific capacity of 124.3 mAhg(-1) is achievable, with no obvious capacity fading after 100 cycles. (C) 2014 Elsevier Ltd. All rights reserved.