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前驱体固相法制备硅酸铁锂正极材料

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Abstract:

以碳酸锂或乙酸锂、草酸亚铁和正硅酸乙酯为原料,蔗糖为碳源,乙酸为催化剂,通过溶胶(凝胶法制备前驱体,再采用固相反应法在600℃、氮气气氛中一步烧结制备了碳包覆硅酸铁锂(Li2FeSiO4/C)正极材料。将其组装成电池进行电化学性能测试。用X射线衍射和扫描电镜表征Li2FeSiO4/C的结构、形貌和晶粒尺寸。结果表明以乙酸锂为锂源制备的Li2FeSiO4/C结晶良好,基本无杂相,晶粒尺寸为50~200nm,分布较均匀;在C/16、C/10、1C和2C(1C=166mA/g)放电速率下,放电比容量分别达153、138、131mA?h/g和93mA·h/g,经过30个充放电循环后,容量几乎没有衰减。

References

[1]  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] WANG G, LIU H, LIU J, et al. Mesoporous LiFePO4/C Nanocomposite Cathode Materials for High Power Lithium Ion Batteries with Superior Performance [J]. Adv Mater, 2010, 22(44): 4944-4948. [3] NYT N A, ABOUIMRANE A, ARMAND M, et al. Electrochemical performance of Li2FeSiO4 as a new Li-battery cathode material [J]. Electrochem Commun, 2005, 7(2): 156-160. [4] DOMINKO R, BELE M, GABERSCEK M, et al. Structure and electrochemical performance of Li2MnSiO4 and Li2FeSiO4 as potential Li-battery cathode materials [J]. Electrochem Commun, 2006, 8(2): 217-222. [5] LI Y X, GONG Z L, YANG Y. Synthesis and characterization of Li2MnSiO4/C nanocomposite cathode material for lithium ion batteries [J]. J Power Sources, 2007, 174(2): 528-532. [6] GONG Z L, LI Y X, YANG Y. Synthesis and characterization of Li2MnxFe1-xSiO4 as a cathode material for lithium-ion batteries [J]. Electrochem Solid State Lett, 2006, 9(12): A542-A544. [7] KOKALJ A, DOMINKO R, MALI G, et al. Beyond one-electron reaction in Li cathode materials: Designing Li2MnxFe1-xSiO4 [J]. Chem Mater, 2007, 19(15): 3633-3640. [8] LI H, WANG Z, CHEN L, et al. Research on advanced materials for Li-ion batteries [J]. Adv Mater, 2009, 21(45): 1-15. [9] CHUNG S Y, BLOKING J T, CHIANG Y M. Electronically conductive phospho-olivines as lithium storage electrodes [J]. Nature Mater, 2002, 1(2): 123-128. [10] ZHANG S, DENG C, YANG S Y. Preparation of nano-Li2FeSiO4 as cathode material for lithium-ion batteries [J]. Electrochem Solid State Lett, 2009, 12(7): A136-A139. [11] GONG Z L, LI Y X, HE G N, et al. Nanostructured Li2FeSiO4 electrode material synthesized through hydrothermal-assisted sol-gel process [J]. Electrochem Solid State Lett, 2008, 11(5): A60-A63. [12] HUANG X, LI X, WANG H, et al. Synthesis and electrochemical performance of Li2FeSiO4/C as cathode material for lithium batteries [J]. Solid State Ionics, 2010, 181(31-32): 1451-1455. [13] DOMINKO R. Li2MSiO4 (M = Fe and/or Mn) cathode materials [J]. J Power Sources, 2008, 184(2): 462-468. [14] LI L-M, GUO H-J, LI X-H, et al. Effects of roasting temperature and modification on properties of Li2FeSiO4/C cathode [J]. J Power Sources, 2009, 189(1): 45-50. [15] NISHIMURA S I, HAYASE S, KANNO R, et al. Structure of Li2FeSiO4 [J]. J Am Chem Soc, 2008, 130(40): 13212-13213. [16] DENG C, ZHANG S, FU B L, et al. Characterization of Li2MnSiO4 and Li2FeSiO4 cathode materials synthesized via a citric acid assisted sol-gel method [J]. Mater Chem Phys, 2010, 120(1): 14-17. [17] MURALIGANTH T, STROUKOFF K R, MANTHIRAM A. Microwave- solvothermal synthesis of nanostructured Li2MSiO4/C (M = Mn and Fe) cathodes for lithium-ion batteries [J]. Chem Mater, 2010, 22(20): 5754-5761.

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