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LiFePO_(3.92)F_(0.08)C的合成、表征和电化学性能 被引量：1

The Synthesis,Characterization and Electrochemical Performances of LiFePO_(3.92)F_(0.08)/C Composites
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摘要 采用两步固相法反应制备LiFePO4/C和LiFePO3.92F0.08/C。采用XRD对样品的结构进行分析。结果表明LiFePO3.92F0.08/C仍然具有橄榄石结构,但是相比于未掺杂的磷酸铁锂其具有更好的倍率性能和循环性能。LiFePO3.92F0.08/C在不同倍率下的放电比容量分别为141.7mAh/g(0.2 C)、113.2 mAh/g(1 C)、70.4 mAh/g(10 C)。尤其是在1 C倍率下循环30圈后,放电比容量仍达115.6 mAh/g。研究显示,F掺杂能够提高电子电导率进而显著改善其电化学性能。 LiFePO4/C and LiFePO3.92Fo.08/C had been prepared by two-step solid-state reaction. The structure of the samples was analyzed by X-ray diffractometry （XRD）. The results verified that LiFePO3.92F0.08/C still maintained the olivine structure of LiFePOdC, but had better rate performance and cyclic stability than those of LiFePO4/C. The corresponding specific discharge capacities of LiFePO3.92Fo.os/C was 141.7 mAh/g at 0.2 C rate, 113.2 mAh/g at 1 C rate, and 70.4 mAh/g at 10 C rate, respectively. Specially, the specific discharge capacity of LiFePO3.92F0.05/C was 115.6 mAh/g at I C after 30 cycles. In this research, we can summarize that F-doping can help improve electrochemical performance by increasing electrical conductivity of LiFePO4/C.
作者 于鹏飞 靳云霞 吴春丹 李玉珠 肖顺华
机构地区 桂林理工大学化学与生物工程学院
出处 《广东化工》 CAS 2014年第7期22-23,共2页 Guangdong Chemical Industry
关键词 LiFePO3 92F0 08 C 电化学性能 电子电导率 LiFePO392Fo0.08/C： electrochemical performance： electrical conductivity
分类号 TQ [化学工程]
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参考文献8

  • 1Padhi A K,Nanjundaswamy K S,Goodenough J B.Phospho-olivines as Positive-Electrode Materials for Rechargeable Lithium Batteries[J] .Journal of the Eletrochemical Society.1997,144:1188-1194.
  • 2Chung S Y,Bloking J T,Chiang Y M.Electronically conductive phospho-olivines as lithium storage electrodes[J] .Nature materials,2002,1(2):123-128.
  • 3Hsu K F,Tsay S Y,Hwang B J.Synthesis and characterization of nano-sized LiFePO4 cathode materials prepared by a citric acid-based sol-gel route[J] .Journal ofMaterialsChemistry,2004,14(17):2690-2695.
  • 4余红明,郑威,曹高劭,赵新兵.优化碳包覆对正极材料LiFePO_4/C高倍率性能的影响[J].物理化学学报,2009,25(11):2186-2190. 被引量：14
  • 5蔡锐,王月芳,邵宗平.LiFePO_4锂电池正极材料的共碳包覆和Mn掺杂的改性[J].南京工业大学学报（自然科学版）,2012,34(6):1-6. 被引量：2
  • 6Yin X G,Huang K,Liu S Q,Wang H Y.Preparation and characterization of Na-doped LiFePO4/C composites as cathode materials for lithium-ion batteries[J] .Journal of Power Sources,2010,195(13):4308-4312.
  • 7Hua N,Wang C Y,Kang X Y,Wumair T,Han Y.Studies of V doping for the LiFePO4-based Li Ion batteries[J] .Journal of Alloys and Compounds,2010,503(1):204-208.
  • 8Yang L,Jiao L F,Miao Y L,Yuan H T.Improvement of electrochemical properties of LiFePO4/C cathode materials by chlorine doping[J] .Journal of Solid State Electrochemistry,2009,13(10):1541-1544.

二级参考文献15

  • 1Padhi A K, Nanjundaswamy K S, Goodenough J B. Phospho-oli- vines as positive-electrode materials for rechargeable lithium bat- teries [ J ]. J Electrochem Soc, 1997,144 : 1188 - 1194.
  • 2Prosini P P, Zane D, Pasquali M. hnproved electrochemical per- formance of a LiFePO4 -based composite cathode[ J 1. Electrochim Acta,2001,46:3517 - 3523.
  • 3Kim H S, Cho B W, Cho W I. Cycling performance of LiFePO4 cathode material for lithium secondary batteries [ J ]. J Power Sources,2004,132:235 - 239.
  • 4Chung S Y, Bloking J T, Chiang Y M. Electronically conductive phospho-olivines as lithium storage electrodes [ J ]. Nat Mater, 2002,1:123 - 128.
  • 5Andersson A S, Kalska B, Haggstrom L, et al. Lithium extraction/ insertion in LiFePO4 : an X-ray diffraction and Mssbauer spec- troscopy study[ J. Solid State Ionics,2000,130:41 - 52.
  • 6Nakamura T, Sakumoto K, Okamoto M. Electrochemical study on Mn2 +-substitution in LiFePO4 olivine compound [ J ]. J Power Sources,2007,174:435 - 441.
  • 7Bini M, Mozzati M C, Galinetto P. Structural, spectroscopic and magnetic investigation of the LiFeI Mnx PO4 (x = 0 -0. 18 ) solid solution [ J ]. J Solid State Chem,2009,182 : 1972 - 1981.
  • 8Wang Y F,Zhang D,Yu X, et al. Mechanoactivation-assisted syn- thesis and electrochemical characterization of manganese lightly doped LiFePO4 [ J] i J Alloys Compd ,2010,492:675 - 680.
  • 9Wang K, Cai R, Yuan T, et al. Process investigation, electrochemi- cal characterization and optimization of LiFePOJC composite from mechanical activation using sucrose as carbon source[ J]. Electrochim Acta,2009 ,54 :2861 - 2868.
  • 10Chen Z, Dahn J R. Reducing carbon in LiFePO4/C composite electrodes to maximize specific energy, volumetric energy, and tap density [ J ]. J Electrochem Soc,2002,149 (9) : AI 184 - A1189.

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广东化工
2014年 第7期

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