水热法制备还原氧化石墨烯担载Ni(OH)<sub>2</sub>纳米带复合材料及其电容特性

李倩; 吕春祥; 陈成猛; 谢莉婧; 袁淑霞

水热法制备还原氧化石墨烯担载Ni(OH)₂纳米带复合材料及其电容特性

1.
中国科学院山西煤炭化学研究所, 中国科学院炭材料重点实验室, 山西太原 030001;
2.
中国科学院大学, 北京 100049;
3.
中国科学院山西煤炭化学研究所, 碳纤维制备技术国家工程实验室, 山西太原 030001

基金项目: 国家自然科学基金（51174144）；山西省科技攻关（201103210392）.

详细信息

作者简介:
李倩,博士研究生.E-mail:liqian1004@163.com

通讯作者:
吕春祥,研究员.E-mail:lucx@sxicc.ac.cn;陈成猛,副研究员.E-mail:ccm@sxicc.ac.cn

中图分类号: TB332
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- 被引次数: 0
出版历程
- 收稿日期: 2017-10-19
- 录用日期: 2017-12-28
- 修回日期: 2017-12-05
- 刊出日期: 2017-12-28

Hydrothermal synthesis of Ni(OH)₂/RGO nanocomposites with superior electrochemical performance

1.
Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China;
3.
National Engineering Laboratory for Carbon Fiber Technology, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Funds: National Natural Science Foundation of China (51174144);Scientific Key Project of Shanxi Province (201103210392).

摘要

摘要: 以氧化石墨烯溶液和硝酸镍为原料，采用一步水热法制备了Ni（OH）₂/还原氧化石墨烯（Ni（OH）₂@RGO）复合材料。在Ni（OH）₂/还原氧化石墨烯的研究中，两组分间的配比对复合物的形貌和电化学活性具有显著的影响。在最佳配比下（RGO含量26.7%），Ni（OH）₂以纳米带形式担载于石墨烯片相互搭接成的三维网络结构中，从而可暴露更多的活性位点和有效比表面积，利于展现更好的电化学性能。该复合材料用作超级电容器电极材料时，展现了高的比电容（在1 A·g^-1下的比电容高达1 804 F·g^-1），良好的倍率性能（在25 A·g^-1下比电容保持率仍在46%以上），以及优异的循环稳定性（在2 A·g^-1下循环2 000次的电容保持率为90.3%）。
- 水热合成 /
- Ni(OH)₂ /
- 石墨烯 /
- 电化学性能
Abstract: Ni(OH)₂/reduced graphene oxide (RGO) nanocomposites for use as electrodes in electrochemical capacitors were prepared from GO and nickel nitrate by a one-step hydrothermal method. The content of RGO in the composites was controlled by changing the GO/nickel nitrate mass ratio. Results indicate that Ni(OH)₂ nanobelts are dispersed uniformly in the three-dimensional conducting network constructed by the RGO, which is favorable for their capacitive performance. The RGO content to achieve the best performance is 26.7 wt%. The best sample has a high specific capacity of 1 804 F/g at 1 A/g, a remarkable capacitance retention rate of 46% even at 25 A/g, and an excellent cycle life with 90.3% capacitance retention after 2 000 cycles at 2 A/g.
- Hydrothermal method /
- Ni(OH)₂ /
- Graphene /
- Electrochemical performance

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参考文献(19)

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