高结晶度片状钛酸锂/石墨烯复合材料的可控制备及其电化学性能

董海勇; 贺艳兵; 李宝华; 康飞宇

高结晶度片状钛酸锂/石墨烯复合材料的可控制备及其电化学性能

清华大学深圳研究生院深圳炭功能材料工程实验室, 广东深圳 518055

基金项目: 国家自然科学青年基金项目(51202121);深圳市基础研究计划(三大产业)重大培育项目(JC201104210152A).

详细信息

作者简介:
董海勇,硕士研究生.E-mail:donghaiyong2011@163.com

通讯作者:
贺艳兵,副研究员.E-mail:he.yanbing@sz.tsinghua.edu.cn

中图分类号: TQ127.1⁺1
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- 文章访问数: 640
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- PDF下载量: 809
- 被引次数: 0
出版历程
- 收稿日期: 2016-02-12
- 录用日期: 2016-04-21
- 修回日期: 2016-04-01
- 刊出日期: 2016-04-28

Controlled preparation and electrochemical performance of a flaky Li₄Ti₅O₁₂-graphene hybrid with a high crystallinity

Engineering Laboratory for Functionalized Carbon Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China

Funds: National Natural Science Foundation of China(51202121); Shenzhen Basic Research Project(JC201104210152A).

摘要

摘要: 以氧化石墨烯为模板剂,N-甲基吡咯烷酮(NMP)为溶剂,通过溶剂热法制备高结晶度、片状结构钛酸锂/石墨烯复合电极材料(NMP-LTO/G)。与未添加氧化石墨烯的样品NMP-LTO相比,样品NMP-LTO/G的片状结构更好,结晶性与电化学性能明显提高。讨论氧化石墨烯作为模板剂的作用机理;基于双亲性结构特征和表面活性剂的特点,在复合材料制备过程中,氧化石墨烯与碱性条件、有机溶剂等产生协同作用,有利于高结晶度片状结构NMP-LTO/G复合材料形成。
- 钛酸锂 /
- 石墨烯 /
- 模板剂 /
- 片状形貌 /
- 高结晶性
Abstract: A Li₄Ti₅O₁₂(LTO)-graphene(G) hybrid with a flaky structure was fabricated by solvothermal treatment of a suspension of graphene oxide(GO), lithium hydroxide and tetrabutyltitanate in 1-methyl-2-pyrrolidinone, followed by calcination of the solid product at 700℃ for 1 h. GO as the precursor of graphene is amphiphilic and acts as an anionic surfactant and template for the growth of LTO under alkaline conditions to form the flaky LTO-G hybrid with a high crystallinity. Compared with the material without GO, the LTO-G has a typical flaky morphology and exhibits a much higher capacity and betterrate capability.
- Li₄Ti₅O₁₂ /
- Graphene /
- Template synthesis /
- Flaky morphology /
- High crystallinity

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参考文献(25)

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