期刊文献+

Li_2MnSiO_4/C复合正极材料的合成及电化学性能 被引量:17

Synthesis and Electrochemical Performance of Li_2MnSiO_4/C Composite Cathode Materials
下载PDF
导出
摘要 采用溶胶-凝胶法合成了Li2MnSiO4/C复合正极材料,并用TG-DTA,XRD和电化学性能测试对材料进行了表征。前驱体的TG-DTA曲线表明,合成Li2MnSiO4时烧结温度应高于500℃。XRD测试表明Li2MnSiO4具有正交结构,对应Pmn21空间群。将Li2MnSiO4/C组装成扣式电池进行电化学测试的结果表明,600℃烧结10h所得样品性能最好,首次放电比容量达到124.2mAh·g-1,为理论比容量的74.5%;循环30次后放电比容量为71.5mAh·g-1。 A kind of cathode materials of Li2MnSiO4/C composites for Li-ion batteries has been prepared by sol-gel method. The samples are characterized by thermo gravimetric-differential thermal analysis (TG-DTA), X-ray diffraction (XRD), and electrochemical performance measurement. The TG-DTA curves of precursor show that the Li2MnSiO4 can be obtained at temperatures above 500 ℃. The XRD patterns indicate that the Li2MnSiO4 crystallized in an orthorhombic structure with a space group of Pmn21. The electrochemical test demonstrates that the Li2MnSiO4/C composite synthesized at 600 ℃ for 10 h shows the best electrochemical performance with an initial discharge capacity of 1242 mAh·g^-1, 74.5% of the theoretical capacity, and retains a discharge capacity of 71.5 mAh·g^-1 after 30 cycles.
出处 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2008年第6期1085-1088,共4页 Rare Metal Materials and Engineering
基金 国家自然科学基金(20671092) 福建省自然科学基金(2005HZ01-1) 中国科学院"百人计划"资助项目
关键词 锂离子电池 正极材料 LI2MNSIO4 溶胶-凝胶 Li-ion batteries cathode material Li2MnSi04 sol-gel
  • 相关文献

参考文献21

  • 1Padhi A K, Nanjundaswamy K S, Goodenough J B. J Electrochem Soc[J], 1997, 144:1188
  • 2Padhi A K, Nanjundaswamy K S, Masquelier C et al. J Electrochem Soc[J], 1997, 144:1609
  • 3Chung S Y, Bloking J T, Chiang Y M. Nat Mate[J], 2002, 1: 123
  • 4Yamada A, Hosoya M, Chung S C et al. J Power Sources[J], 2003, 119-121:232
  • 5Ravet N, Chouinard Y, Magnan J F et al. J Power Sources[J], 2001, 97/98:503
  • 6Nyten A, Abouimrane A, Armand M et al. Electrochem Commun [J], 2005, 7:156
  • 7Nyten A, Kamali S, Haggstrom L et al. J Mater Chem[J], 2006, 16:2266
  • 8Nyten A, St jerndahl M, Rensmo H et al. J Mater Chem[J], 2006, 16(34): 3483
  • 9Arroyo-de Dompablo M E, Armand M, Tarascon J M et al. Electrochem Commun [J], 2006, 8(8): 1292
  • 10Dominko R, Bele M, Gaberscek M et al. Electrochem Commun[J], 2006, 8:217

同被引文献188

引证文献17

二级引证文献39

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部