Yamada A，HosoyaM，Chung S C，et al.Olivineˉtype cathodes achievements and problems[J].J Power Sources，2003，119/121:232ˉ238.
[2]
PadhiA K，NanjundaswamyK S，Goodenough J B.Phosphoˉolivines as positiveˉelectrodematerials for rechargeable lithium batˉteries[J].J Electrochemical Societ，1997，144（4）:1188ˉ1194.
[3]
HuntA，ChingW Y，ChiangYM，et al.Electronic structures ofLiFePO 4 and FePO 4 studied using resonant inelastic Xˉray scatˉtering[J].Phys Rev，2006，B73:205120ˉ1ˉ205120ˉ10.
[4]
Chung S Y，Bloking JT，ChiangYM.Electronically conductive phosphoˉolivines as lithium storage electrodes[J].NatureMateˉrials，2002，1:123ˉ128.
[5]
KalaiselviN，Doh C H，Park CW，et al.A novel approach to exploitLiFePO 4 compound as an ambient temperature high capacity anode material for rechargeable lithium batteries[J].Electrochemistry Communications，2004，6:1110ˉ1113.
[6]
W ang G X，Bewlay S L，Konstantinov K，et al.Physical and electrochemical properties of doped lithium iron phosphate elecˉtrodes[J].Electrochimica Acta，2004，50:443ˉ447.
[7]
ParkK S，Son JT，ChungH T，et al.Surfacemodification by silver coating for improving electrochemical properties ofLiFePO 4 [J].Solid State Communications，2004，129:311ˉ314.
[8]
Ouyang C Y，W ang D Y，Shi S Q，et al.First principles study on Na x Li 1ˉx FePO 4 as cathode material for rechargeable lithium batteries[J].China Phys Lett，2006，23（1）:61ˉ64.
[9]
Tang P，Holzwarth N A W.Electronic structure ofFePO 4 ，LiFePO 4 ，and related materials[J].Phys Rev，2003，B68:165107ˉ1ˉ165107ˉ10.
KohnW，Sham L J.Selfˉconsistent equations including exchange and correlation effects[J].PhysRev，1965，A140:1133ˉ1138.
[12]
Hammer B，Hansen L B，Norskov J K.Improved adsorption energetics within densityˉfunctional theory using revised PerdewˉBurkeˉErnzerhof functionals[J].Phys Rev，1999，B59:7413ˉ7421.
[13]
StreltsovV A，Belokoneva E L，TsirelsonV G，et al.Multipole analysis of the electron density in triphylite，LiFePO 4 ，usingXˉray diffraction data[J].Acta Crystallographica，1993，B49:147ˉ153.
[14]
HuangH，Yin S C，NazarL F.Approaching theoretical capacity ofLiFePO 4 at room temperature athigh rates[J].Electrochemiˉcal and SolidˉState Letters，2001，4（10）:A170.
[15]
Mi C H，Cao G S，Zhao X B.Lowˉcost，oneˉstep process for synthesis of carbonˉcoated LiFePO 4 cathode[J].Materials Letters，2005，59:127ˉ130.
[16]
W ang D Y，LiH，Shi SQ，et al.Improving the rate performance ofLiFePO 4 by Feˉsite doping[J].ElectrochimicaActa，2005，50:2955ˉ2958.
[17]
Sun Y H，Liu D Q，Yu J，et al.Synthesis and electrochemical proper ties ofTiˉdoped nonstoichiometric LiFePO 4 for lithiumˉion battery application[J].Chinese J Inorganic Chemistry，2006，22（9）:1711ˉ1714.
[18]
Shi S Q，Liu L J，Ouyang C Y，et al.Enhancement of electronic conductivity ofLiFePO 4 by Cr doping and its identification by firstˉprinciples calculations[J].Phys Rev，2003，B68:195108ˉ1ˉ195108ˉ5.
[19]
VanderbiltD.Soft selfˉconsistent pseudopotentials in a generalized eigenvalue formalism[J].Phys Rev，1990，B41:7892ˉ7895.
[20]
Zhou F，KangK，Maxisch T，et al.The electronic structure and band gap ofLiFePO 4 and LiMnPO 4 [J].Solid State Communiˉcations，2004，132:181ˉ186.
