One-pot, glycine-assisted combustion synthesis and characterization of nanoporous LiFePO4/C composite cathodes for lithium-ion batteries

被引:37
作者
Kalaiselvi, N. [2 ]
Manthiram, A. [1 ]
机构
[1] Univ Texas Austin, Electrochem Energy Lab, Austin, TX 78712 USA
[2] Cent Electrochem Res Inst, ECPS Div, Karaikkudi 630006, Tamil Nadu, India
关键词
Lithium-ion battery; Lithium iron phosphate; Combustion synthesis; Nanoporous composite; SOL-GEL SYNTHESIS; ELECTROCHEMICAL PERFORMANCE; OLIVINE LIFEPO4; HYDROTHERMAL SYNTHESIS; CARBON STRUCTURE; IMPACT; ENERGY; FE;
D O I
10.1016/j.jpowsour.2009.11.054
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Nanoporous LiFePO4/C composite cathodes have been synthesized by a novel one-pot, glycine-assisted combustion (GAC) method in presence of 2 wt.% Super P carbon in both At and 90% Ar-10% H-2 atmospheres at 750 degrees C for a short time of 6 h. While the At atmosphere offers phase pure samples, the Ar-H-2 atmosphere leads to the formation of impurity phases as indicated by X-ray diffraction data. The combustion-initiated expulsion of gases aids the formation of a nanoporous LiFePO4/C composite structure as evident from electron microscopic analysis, which could allow easy penetration of the electrolyte and realization of an electronic-ionic 3D network. The nanoporous LiFePO4/C sample synthesized in At atmosphere exhibits a high discharge capacity of 160 mAh g(-1) with 3% capacity fade in 50 cycles and high rate capability. With a short reaction time, the GAC method offers an energy efficient approach to synthesize high performance olivine LiFePO4/C composite cathodes. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:2894 / 2899
页数:6
相关论文
共 45 条
  • [41] The preparation and characterization of olivine LiFePO4 by a solution method
    Wu, SH
    Hsiao, KM
    Liu, WR
    [J]. JOURNAL OF POWER SOURCES, 2005, 146 (1-2) : 550 - 554
  • [42] LiFePO4 Nanoparticles Embedded in a Nanoporous Carbon Matrix: Superior Cathode Material for Electrochemical Energy-Storage Devices
    Wu, Xing-Long
    Jiang, Ling-Yan
    Cao, Fei-Fei
    Guo, Yu-Guo
    Wan, Li-Jun
    [J]. ADVANCED MATERIALS, 2009, 21 (25-26) : 2710 - +
  • [43] A PEG assisted sol-gel synthesis of LiFePO4 as cathodic material for lithium ion cells
    Xu, Zhihui
    Xu, Liang
    Lai, Qiongyu
    Ji, Xiaoyang
    [J]. MATERIALS RESEARCH BULLETIN, 2007, 42 (05) : 883 - 891
  • [44] Nonaqueous sol-gel synthesis of high-performance LiFePO4
    Yang, JS
    Xu, JJ
    [J]. ELECTROCHEMICAL AND SOLID STATE LETTERS, 2004, 7 (12) : A515 - A518
  • [45] Hydrothermal synthesis of lithium iron phosphate cathodes
    Yang, SF
    Zavalij, PY
    Whittingham, MS
    [J]. ELECTROCHEMISTRY COMMUNICATIONS, 2001, 3 (09) : 505 - 508