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

O2结构Li_xMn_(0.7)Co_(0.3)O_2正极材料的可控制备及其电化学性能研究

Controllable Synthesis and Electrochemical Characteristics of O2-Li_xMn_(0.7)Co_(0.3)O_2 Cathode Materials
下载PDF
导出
摘要 采用溶胶-凝胶法,通过控制Na/(Mn+Co)投料比,合成了层状P2结构的NaxMn0.7Co0.3O2;以NaxMn0.7Co0.3O2为前驱体,经离子交换反应得到层状O2结构LixMn0.7Co0.3O2,锂含量x达到0.9。电化学性能测试表明,随着锂含量的增加,可逆比容量逐渐增大,首次充电不可逆容量也明显增大,其中以Li0.9Mn0.7Co0.3O2的可逆比容量及首次不可逆比容量最高,且保持了良好的电化学循环稳定性。 Layered sodium manganese bronzes NaxMn0. 7 Co0. 3 O2 with the P2 structure are synthesized by the citric acid sol-gel method through controlling the atomic ratio Na/（Mn＋Co）. Bronzes NaxMn0. 7 Co0. 3 O2 precursors are used to prepare layered O2-Lix Mn0. 7 Co0.3 O2 by molten salt ion exchange method, with a maximum Li content reaehs 0. 9. Electrochemical performance test shows that the reversible specific capacity of the layered Lix Mn0. 7 Co0. 3O2 increases with Li content increasing, so does the irreversible capacity during the first charge and discharge, and shows a maximum with a composition of Li0.9 Mn0. 7 Co0. 3 O2. Li0. 9 Mn0. 7 Co0. 3O2 also maintains a good electrochemical cycle stability.
作者 陈冬梅 杨钰 张朝平
机构地区 贵州大学化学与化工学院
出处 《材料导报》 EI CAS CSCD 北大核心 2010年第10期56-60,共5页 Materials Reports
基金 贵州大学自然科学青年科研基金(2009(064))
关键词 溶胶-凝胶法 离子交换 层状O2-LixMn0.7Co0.3O2 sol-gel method, ion exchange, layered O2- LixMn0．7Co0．3O2
分类号 TQ174.1 [化学工程—陶瓷工业]
  • 相关文献

参考文献18

  • 1Yoncheva M, Stoyanova R, Zhecheva E, et al. Electro-chemical performance and local cationic distribution in layered LiNi1/2Mn1/2O2 electrodes for lithium ion batteries[J]. Electrochimica Acta, 2009,54(6) : 1694.
  • 2Suresh P, Shukla A K, Munichandraiah N. Characterization of Zn- and Fe-substituted LiMnO2 as cathode materials in Liion cells[J]. J Power Sources, 2006,161(2) : 1307.
  • 3Huang Z F, Wang C Z, Meng X, et al. Effects of Al-doping on the stabilization of monoclinic LiMnO2 [J]. J Solid State Chem,2006,179(5) : 1602.
  • 4Park C W, Mangani I R, Ryu H W, et al. Structural and electrochemical study of Cr-substituted layered manganese oxide cathode materials[J]. J Phys Chem Solids, 2007,68(5- 6):1126.
  • 5Bach S, Pereira-Ramos J P, Willmann P. A sodium layered manganese oxides as 34 cathode materials for secondary lithium batteries [J]. Eeetrochimiea Acta, 2006,52 (2) : 504.
  • 6Paulsen J M, Dahn J R. Studies of the layered manganese bronzes, Na2/3Mn1-xMxO2 with M=Co, Ni, Li, and Li2/3-[Mn1-xMx]O2 prepared by ion-exchange[J]. Solid State Ionics,1999,126:3.
  • 7Paulsen J M, Dahn J R. Layered Li-Mn-Oxide with the O2 structure: A cathode materials for Li-ion cells which does not convert to spinel[J]. J Electrochem Soc, 1999,146(10): 3560.
  • 8Wang X, Yang X H, Zheng H G, et al. Layered O2-Li2/3- (Ni1/3-xMn2/3-xM2x)O2 (M = Cr, Co, 3=0. 05) cathode materials for Li-ion rechargeable batteries [J]. Solid State Ionies, 2005,176(11-12): 1043.
  • 9Wei M, Lu Y L, Evans D G, et al. Layered Li-Mn oxides with the O2 structure: Preparation of Li2/3 Mn1-xMxO2 (M=Li, Cr, Mg, Al) by ion exchange[J]. Solid State Ionics,2003,161 :133.
  • 10Yair F. E. A new perspective on the formation and structure of the solid electrolyte interface at the graphite anode of Liion cells [J]. Electrochem Solid State Lett, 1999,2 ( 5 ): 212.
材料导报
2010年 第10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