Synthesis and electrochemical properties of Al-doped LiVPO4F cathode materials for lithium-ion batteries

稀有金属（英文版）, 2007, 26(5): 445-449.

^1, , ^2, , ^3, , ^4,

1.College of Chemistry and Chemical Engineering Central South University, Changsha 410083, China;Department of Materials and Chemistry, Guilin University of Technology, Guilin 541004, China

2.College of Chemistry and Chemical Engineering Central South University, Changsha 410083, China

3.School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

4.College of Chemistry and Chemical Engineering Central South University, Changsha 410083, China

Synthesis and electrochemical properties of Al-doped LiVPO4F cathode materials for lithium-ion batteries

ZHONG Shengkui ^1, , YIN Zhoulan ^2, , WANG Zhixing ^3, , CHEN Qiyuan ^4,

1.College of Chemistry and Chemical Engineering Central South University, Changsha 410083, China;Department of Materials and Chemistry, Guilin University of Technology, Guilin 541004, China

2.College of Chemistry and Chemical Engineering Central South University, Changsha 410083, China

3.School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

4.College of Chemistry and Chemical Engineering Central South University, Changsha 410083, China

Keywords： lithium-ion batteries

Al-doped LiVPO4F cathode materials LiAlxV1-xPO4F were prepared by two-step reactions based on a carbothermal reduction (CTR) process. The properties of the Al-doped LiVPO4F were investigated by X-ray diffraction (XRD),scanning electron microscopy (SEM), and electrochemical measurements. XRD studies show that the Al-doped LiVPO4F has the same triclinic structure (space group p(1)) as the undoped LiVPO4F. The SEM images exhibit that the particle size of Al-doped LiVPO4F is smaller than that of the undoped LiVPO4F and that the smallest particle size is only about 1 μm. The Al-doped LiVPO4F was evaluated as a cathode material for secondary lithium batteries, and exhibited an improved reversibility and cycleability, which may be attributed to the addition of Al3+ ion by stabilizing the triclinic structure.

参考文献

[1]	Zhaohui Chen;J. R. Dahn .Reducing Carbon in LiFePO_4/C Composite Electrodes to Maximize Specific Energy, Volumetric Energy, and Tap Density[J].Journal of the Electrochemical Society,2002(9):A1184-A1189.
[2]	Takahashi K;Saitoh M;Asakura N;Hibino T,Sano M,Fujita M, Kifune K .Electrochemical properties of lithium manganese oxides with different surface areas for lithium ion batteries[J].Journal of Power Sources,2004,136:115.
[3]	Arachi Y;Kobayashi H;Emura S;Nakata Y;Tanaka M;Asai T;Sakaebe H;Tatsumi K;Kageyama H .Li de-intercalation mechanism in LiNi0.5Mn0.5O2 cathode material for Li-ion batteries[J].Solid state ionics,2005(9/10):895-903.
[4]	Liu QY;Liu HW;Zhou XW;Cong CJ;Zhang KL .A soft chemistry synthesis and electrochemical properties of LiV3O8 as cathode material for lithium secondary batteries[J].Solid state ionics,2005(17/18):1549-1554.
[5]	Park S H;Sun Y K .Synthesis and electrochemical properties of 5 V spinel LiNi0.5Mn0.5O4 cathode material prepared by ultrasonic spray pyrolysis method[J].Electrochimica Acta,2004,50(2-3):427.
[6]	Park SH;Oh SW;Myung ST;Kang YC;Sun YK .Effects of synthesis condition on LiNi1/2Mn3/2O4 cathode material for prepared by ultrasonic spray pyrolysis method[J].Solid state ionics,2005(5/6):481-486.
[7]	邓凌峰,李新海,肖立新,张云河.Synthesis and electrochemical properties of polyradical cathode material for lithium second batteries[J].中南工业大学学报(英文版),2003(03):190-194.
[8]	Padhi AK.;Goodenough JB.;Nanjundaswamy KS. .PHOSPHO-OLIVINES AS POSITIVE-ELECTRODE MATERIALS FOR RECHARGEABLE LITHIUM BATTERIES[J].Journal of the Electrochemical Society,1997(4):1188-1194.
[9]	Y. Hu;M. M. Doeff;R. Kostecki .Electrochemical Performance of Sol-Gel Synthesized LiFePO_4 in Lithium Batteries[J].Journal of the Electrochemical Society,2004(8):A1279-A1285.
[10]	Patoux S;Wurm C;Morcrette M;Rousse G,Masquelier C .A comparative structural and electrochemical study of monoclinic Li3Fe2(PO4)3 and Li3V2(PO4)3[J].Journal of Power Sources,2003,119-121:278.
[11]	Richardson T J .Phosphate-stabilized lithium intercalation compounds[J].Journal of Power Sources,2003,119-121:262.
[12]	Zhou F;Kang KS;Maxisch T;Ceder G;Morgan D .The electronic structure and band gap of LiFePO4 and LiMnPO4[J].Solid State Communications,2004(3/4):181-186.
[13]	Zane D;Carewska M;Scacia S;Cardellini F,Prosini P.P .Factor affecting rate performance of undoped LiFePO4[J].Electrochimica Acta,2004,49(25):4259.
[14]	Barker J;Saldi M Y;Swoyer J .Lithium Metal Fluorophosphates Materials and Preparation Thereof[P].US 6387568,2002.
[15]	Barker J;Saidi M Y;Swoyer J L .Electrochemical insertion properties of the novel lithium vanadium fluorophosphates,LiVPO4F[J].Journal of the Electrochemical Society,2003,150(10):A1394.
[16]	Baran EJ. .Materials belonging to the CrVO4 structure type: preparation, crystal chemistry and physicochemical properties [Review][J].Journal of Materials Science,1998(10):2479-2497.

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Synthesis and electrochemical properties of Al-doped LiVPO4F cathode materials for lithium-ion batteries

参考文献