Template-synthesized LiCoO2, LiMn2O4, and LiNi0.8 Co0.2 O2 nanotubes as the cathode materials of lithium ion batteries.
Template-synthesized LiCoO2, LiMn2O4, and LiNi0.8 Co0.2 O2 nanotubes as the cathode materials of lithium ion batteries.
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DOI：
10.1021/jp051900a
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发表时间：
2005-06
期刊：
影响因子：
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通讯作者：
Xiaoxia Li;F. Cheng;B. Guo;Jun Chen
中科院分区：
文献类型：
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作者：
Xiaoxia Li;F. Cheng;B. Guo;Jun Chen
本工作的第一个重点是以多孔阳极氧化铝为模板，采用溶胶-凝胶法制备LiCoO 2、LiNi0.8Co0.2O2和LiMn 2 O 4纳米管。通过扫描电子显微镜、透射电子显微镜和X射线衍射分析，合成的材料为具有均匀形状和尺寸的开口纳米管。对纳米管的形成过程进行了“原位反应”机理的探讨。本文的第二个重点是研究所合成的纳米管作为锂离子电池正极材料的电化学性能。结果表明，纳米管电极具有更好的可逆性和更高的放电容量比纳米晶对应物。并对纳米管电极电化学性能提高的原因进行了解释。
The first point of this work is to synthesize LiCoO2, LiNi0.8 Co0.2 O2, and LiMn2O4 nanotubes with the template of porous anodic aluminum oxide by thermal decomposition of sol-gel precursors. The as-synthesized materials were open-ended nanotubes with uniform shape and size based on the analysis of scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. An "in situ reaction from nanoparticle to nanotube" mechanism was discussed for the formation process of the nanotubes. The second point of this paper is to investigate the electrochemical properties of the as-synthesized nanotubes for the cathode materials of lithium ion batteries. It was found that the nanotube electrodes exhibited better reversibility and higher discharge capacities than that of their nanocrystalline counterparts. The reason for the improved electrochemical performance of the nanotube electrodes was also interpreted.