PADHI A K, NANJUNDASWAMY K S, GOODENOUGH J B. Phospho-Olivines as positive electrode materials for rechargeable lithium batteries [J]. J Electrochem Soc, 1997, 144(4): 1188-1194. [2] PADHI A K, NANJUNDASWAMY K S, MASQUELIER C, et al. Effect of structure on the Fe3+/Fe2+ redox couple in iron phosphates [J]. J Electrochem Soc, 1997, 144(5): 1609-1613. [3] MI C H, CAO Y X, ZHANG X G, et al. Synthesis and characterization of LiFePO4/(Ag+C) composite cathodes with nano-carbon webs [J]. Powder Technol, 2008, 181(3): 301-306. [4] CHEN Z Y, ZHU H L, JI S, et al. Influence of carbon sources on electrochemical performances of LiFePO4/C composites [J]. Solid State Ionics, 2008, 179(27-32): 1810-1815. [5] YOON W S, CHUNG K Y, NAM K W, et al. Electronic structural changes of the electrochemically delithiated LiFe0.5Co0.5PO4 cathode material studied by X-ray absorption spectroscopy [J]. J Power Sources, 2008, 183(1): 427-430. [6] SHIN H C, PARK S B, JANG H, et al. Rate performance and structural change of Cr-doped LiFePO4/C during cycling [J]. Electrochim Acta, 2008, 53(27): 7946-7951. [7] CHANG H H, CHANG C C, SU C Y, et al. Effects of TiO2 coating on high-temperature cycle performance of LiFePO4-based lithium-ion batteries [J]. J Power Sources, 2008, 185(1): 466-472. [8] CHEN X J, Cao G S, ZHAO X B, et al. Electrochemical performance of LiFe1-xVxPO4/carbon composites prepared by solid-state reaction [J]. J Alloys Compd, 2008, 463(1/2): 385-389. [9] XU J, CHEN G, TENG Y J, et al. Electrochemical properties of LiAlxFe1-3x/2PO4/C prepared by solution method [J]. Solid State Commun , 2008, 147(9/10): 414-418. [10] SHIRATSUCHI T, OKADA S, DOI T, et al. Cathodic performance of LiMn1-xMxPO4 (M = Ti, Mg and Zr) annealed in an inert atmosphere [J]. Electrochim Acta, 2009, 54(11): 3145-3151. [11] GE Yucui, YAN Xudong, LIU Jing, et al. An optimized Ni doped LiFePO4/C nanocomposite with excellent rate performance [J]. Electrochim Acta, 2010, 55(20): 5886-5890. [12] ZHANG Wenkui, HU Yilan, TAO Xinyong, et al. Synthesis of spherical LiFePO4/C via Ni doping [J]. J Phys Chem Solids, 2010, 71(9): 1196-1200. [13] LU Yang, SHI Jichen, GUO Zaiping, et al. Synthesis of LiFe1-xNixPO4/C composites and their electrochemical performance [J]. J Power Sources, 2009, 194(2): 786-793. [14] XU J, CHEN G, LI H J, et al. Direct-hydrothermal synthesis of LiFe1-x? MnxPO4 cathode materials [J]. J Appl Electrochem, 2010, 40(3): 575- 580. [15] WANG Y F, ZHANG D, YU X, et al. Mechanoactivation-assisted synthesis and electrochemical characterization of manganese lightly doped LiFePO4 [J]. J Alloys Compd, 2010, 492(1/2): 675-680. [16] LI C F, HUA N, WANG C Y, et al. Effect of Mn2+ doping in LiFePO4 and the low temperature electrochemical performances [J]. J Alloys Compd, 2010, doi:10.1016/j.jallcom.2010.10.083. [17] LEE K T, LEE K S. Electrochemical properties of LiFe0.9Mn0.1PO4/ Fe2P cathode material by mechanical alloying [J]. J Power Sources, 2009, 189(1): 435-439. [18] ANDERSSON A S, KALSKA B, HAGGSTROM L, et al. Lithium extraction/insertion in LiFePO4: an X-ray diffraction and M?ssbauer spectroscopy study [J]. Solid State Ionics, 2000, 130(1/2): 41-52. [19] PERDEW J P, BURKE K, ERNZERHOFF M. Generalized gradient approximation made simple [J]. Phys Rev Lett, 1996, 77(18): 3865- 3868. [20] 闵新民, 张文芹, 许德华. LiFePO4系列电池材料的电子结构与性能研究[J]. 化学与生物工程, 2005(04): 38-39. MIN Xinming, ZHANG Wenqin, XU Dehua. Chem Bioeng (in Chinese), 2005(04): 38-39. [21] XU Fangwei, XUE Weidong, WANG Mingxi, et al. First principles study on Mn- doped LiFePO4 as cathode material for rechargeable lithium batteries [J](Eng). J At Mol Phys, 2007, 24(z1): 128-132.