Facile synthesis of N-doped carbon-coated Li4Ti5O12 microspheres using polydopamine as a carbon source for high rate lithium ion batteries
Facile synthesis of N-doped carbon-coated Li4Ti5O12 microspheres using polydopamine as a carbon source for high rate lithium ion batteries
复制标题
使用聚多巴胺作为高倍率锂离子电池碳源轻松合成氮掺杂碳包覆Li4Ti5O12微球
DOI：
10.1039/c3ta10623c
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Zhang, Xiaogang
中科院分区：
文献类型：
--
作者：
Li, Hongsen;Shen, Laifa;Zhang, Xiaogang
采用溶液法结合热处理合成氮掺杂（N-掺杂）碳包覆Li4Ti5O12微球，首先制备聚多巴胺包覆TiO2，然后原位转化为N掺杂碳包覆Li4Ti5O12微球。重要的是，该过程不需要模板，也不需要严格的反应条件，简单、有效、通用。所得N掺杂碳涂层的厚度可以通过控制多巴胺的涂覆时间来定制。优化设计的氮掺杂碳包覆Li4Ti5O12微球具有连续、高电子导电网络，当用作负极材料时，表现出优异的倍率性能（30 C下为123 mA h g(-1)）和优异的容量保持率（10 C下200次循环后为136.5 mA h g(-1)），表明其在高倍率锂离子电池中的应用前景。
Nitrogen-doped (N-doped) carbon-coated Li4Ti5O12 microspheres are synthesized by a solution method combined with heat treatment, in which polydopamine-coated TiO2 is first prepared and subsequently transformed in situ into N-doped carbon-coated Li4Ti5O12 microspheres. Importantly, neither templates nor rigorous reaction conditions are needed in this process that makes it simple, effective and general. The thickness of the resulting N-doped carbon coating layer can be tailored by controlling the coating time of dopamine. The optimum designed N-doped carbon-coated Li4Ti5O12 microspheres with a continuous and high electronically conducting network demonstrated superior rate performance (123 mA h g(-1) at 30 C) and excellent capacity retention (136.5 mA h g(-1) after 200 cycles at 10 C) when used as anode material, indicating their promising application in high-rate lithium ion batteries.