▎ 摘　　要

A novel self-assembled LiFePO4/graphene composite is successfully prepared by a facile template-free hydrothermal approach. Physical and electrochemical properties of the LiFePO4/graphene composite as cathode material in rechargeable hybrid aqueous batteries are firstly investigated. The LiFePO4/graphene composite exhibits a high discharge capacity of 145.8 mAh g(-1) at 0.2 C, which is 40% higher than that of pristine LiFePO4. Moreover, LiFePO4/graphene shows much better rate capability and excellent cyclability. This enhanced electrochemical performance could be attributed to the positive effects of graphene nanosheets, which create a flexible electrical conductive matrix, ensuring a continuous electron pathway in bulk electrode and absorbing the volume change during lithium intercalation/de-intercalation of LiFePO4. (C) 2015 Elsevier B.V. All rights reserved.