Preparation and electrochemical performance of LiFePO4/C composite with carbon core structure

LiFePO4/C composite with carbon core structure was successfully prepared by using araldite as carbon source. The microstructure and morphology of LiFePO4/C composite were confirmed by X-ray diffraction and transmission electron microscopic observation. The experimental results show that this structure is entirely different from carbon coating. The LiFePO4/C Composite forms a common core structure in which carbon is used as line core and carbon core is covered by nano-LiFePO4 grains. Moreover, the LiFePO4/C composite exhibits higher tap density of 1.66 g cm(-3), shows higher capacity about 162 mAhg(-1) applied 30 mAg(-1) current, excellent cyclic ability and rate capability about 139 mAhg(-1) applied 700 mAg(-1) current at room temperature. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.