期刊文献+
任意字段
题名或关键词
题名
关键词
文摘
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息

Li_(1.02)Cr_(0.1)Mn_(1.9)O_4表面包覆的热稳定性研究 被引量：3

Elevated-temperature Performance of Li_(1.02)Cr_(0.1)Mn_(1.9)O_4 by Surface Modification
下载PDF
导出
摘要 Improvement of elevated-temperature performance of Li1.02Cr0.1Mn1.9O4 cathode material by silicious surface modification was studied. The Li1.02Cr0.1Mn1.9O4 cathode material was treated by silanes coupling agent and then heated at 580 ℃ to remove organic material. The structures of the modified and unmodified Li1.02Cr0.1Mn1.9O4 were characterized by SpectraPlus, SEM and XRD. The results show that the surface layer of Li1.02Cr0.1Mn1.9O4 material is found to be rich in silicious compound. X-ray diffraction show that all the samples have perfect spinel structure. The electrochemical characterization of modified Li1.02Cr0.1Mn1.9O4 cathode material was tested. The cycle stability of charge/discharge at 55℃ is improved. The results of the charge/discharge curves show that the modified Li1.02Cr0.1Mn1.9O4 has better performance than those unmodified according to the inhibition of decline of reversible capacity of spinel Li1.02Cr0.1Mn1.9O4. Therefore, cycle performance is improved so obviously that 86.03% of the initial capacity is preserved after 100 cycles. Improvement of elevated-temperature performance of Li1.02Cr0.1Mn1.9O4 cathode material by silicious surface modification was studied. The Li1.02Cr0.1Mn1.9O4 cathode material was treated by silanes coupling agent and then heated at 580 ℃ to remove organic material. The structures of the modified and unmodified Li1.02Cr0.1Mn1.9O4 were characterized by SpectraPlus, SEM and XRD. The results show that the surface layer of Li1.02Cr0.1Mn1.9O4 material is found to be rich in silicious compound. structure. The electrochemical characterization of stability of charge/discharge at 55℃ is improved. X-ray diffraction show that all the samples have perfect spinel modified Li1.02Cr0.1Mn1.9O4 cathode material was tested. The cycle The results of the charge/discharge curves show that the modifled Li1.02Cr0.1Mn1.9O4 has better performance than those unmodified according to the inhibition of decline of reversible capacity of spinel Li1.02Cr0.1Mn1.9O4. Therefore, cycle performance is improved so obviously that 86.03% of the initial capacity is preserved after 100 cycles.
作者 卢星河 唐致远 韩冬
机构地区 天津大学化工学院 河北工程大学理学院
出处 《无机化学学报》 SCIE CAS CSCD 北大核心 2006年第5期890-894,共5页 Chinese Journal of Inorganic Chemistry
基金 国家自然科学基金资助项目(No.20273047)
关键词 锂离子电池 掺铬Li1.02Mn2O4 正极材料 有机硅化物 表面包覆 热稳定性 lithium-ion battery Cr2O3-doped Li1.02Mn2O4 cathode material silanes surface modification elevated-temperature performance
分类号 O614.111 [理学—无机化学] O614.711 [理学—无机化学]
  • 相关文献

参考文献3

二级参考文献38

  • 1[1]Blyr A, Sigala C, Amatucci G, et al. Self - discharge of LiMn2O4/CLi - ion cells in their discharged state [J]. Electrochem Soc, 1998, 145(1):194.
  • 2[2]PasquierADu, BlyrA, CourjalP, etal, Mechanismforlimited55℃storage performance of Li1.05 Mnt.95 O4 electrodes [ J ] . ElectrochemSoc, 1999, 146(2):428.
  • 3[3]Pasquier A du, Blyr A, Cressent A, et al. An update on the hightemperature ageing mechanism in LiMn2O4-based Li-ion cells[J ] .JPower Sources, 1999, 81 - 82:54.
  • 4[4]Huang H, Vincent C A, Bruce P G. Capacity loss lithium manganeseoxide spinel in LiPF6/ethylene carbonate - dimethyl carbonate elec-trolytes[J].Electrochem Soc, 1999, 146:481
  • 5[6]Xia Y. Zhou Y. Yoshio M. Capacity fading on cycling of 4V Li/LiMrn2O4 cells[J ]. Electrochem Soc, 1997, 8:2 593.
  • 6[7]Inoue T , Sano M. An investigation of capacity fading of manganesespinels stored at elevated temperature[J] .Electrochem Soc, 1998,145:3 074.
  • 7[8]Guyomard D, Tarascon J-M. The carbon/ Li1+xMn2O4 system[J],Solid State Ionics, 1994, 69: 222.
  • 8[9]WenS J, RichardsonTJ, MaL, etal. FTIR spectroscopy of metaloxide insertion electrodes: a new diagnostic tool for analysis of capaci-ty fading in secondary Li/ Li1 + x Mn2O4 cells[ J ]. Electrochem Soc,1996, 143:L136
  • 9[10]Robertson A D, Lu S H, Howard W F, et al. M3+-modifiedLiMn2O4 spinel intercalation cathodes II Electrochemical stabilizationby Cr3+ [J] .Electrochem Soc, 1997, 10:3 505.
  • 10[11]Zhang D, Popov B N, White R E. Electrochemical investigation ofCrO2.65 doped LiMn2O4 as a cathode material for Lithium ion batter-ies[J] .J Power Sources, 1998, 76:81.

共引文献27

同被引文献35

引证文献3

二级引证文献7

无机化学学报
2006年 第5期

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