MnO<sub>2</sub>/CMSs复合材料的制备及其电化学性能

杨永珍; 刘伟峰; 郭明聪; 刘旭光; 许并社

MnO₂/CMSs复合材料的制备及其电化学性能

杨永珍^1,2,
刘伟峰^1,3,
郭明聪^1,3,
刘旭光^1,3,,
许并社^1,2

1.
太原理工大学新材料界面科学与工程教育部重点实验室, 太原 030024;
2.
太原理工大学新材料工程技术研究中心, 太原 030024;
3.
太原理工大学化学化工学院, 太原 030024

基金项目: 长江学者与创新团队发展计划(IRT0972); 国家自然科学基金(20971094); 山西省国际合作项目(2010081017); 山西省自然科学基金(2009011012-4); 山西省回国留学人员科研项目(2008-31); 山西省研究生优秀创新项目(20093009)

详细信息

通讯作者:
刘旭光, 教授, 主要研究方向为纳米碳材料 E-mail: liuxuguang@tyut.edu.cn

中图分类号: TB332
计量
- 文章访问数: 1560
- PDF下载量: 691
- 被引次数: 0
出版历程
- 收稿日期: 2010-07-12
- 修回日期: 2011-01-25
- 刊出日期: 2011-08-15

Preparation and electrochemical property of MnO₂/carbon microsphere composite

1.
Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology), Ministry of Education, Taiyuan 030024, China;
2.
Research Center on Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China;
3.
College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China

摘要

摘要: 采用0.1 mol/L的KMnO₄和0.1 mol/L的HNO₃对化学气相沉积法合成的碳微球(CMSs)进行氧化后, 在CMSs表面包覆MnO₂层得到MnO₂/CMSs复合材料, 用H₂C₂O₄洗涤MnO₂/CMSs复合材料得到氧化CMSs。通过场发射扫描电子显微镜、高分辨透射电子显微镜和X射线衍射仪等对产物的形貌和结构进行表征, 观察了氧化前后CMSs在水和乙醇中的分散性, 并采用循环伏安法测试了MnO₂/CMSs复合材料的电化学性能。结果表明: 经KMnO₄和HNO₃处理的CMSs表面包覆有MnO₂层, MnO₂的负载率约为60%。MnO₂/CMSs复合材料在中性溶液中有一定的电容性能; 经H₂C₂O₄洗涤后得到氧化CMSs, 其表面引入了含氧官能团, 使其在水和乙醇中均表现出良好的分散性。
- 碳微球 /
- MnO₂ /
- 改性 /
- 复合材料 /
- 电化学性能
Abstract: The MnO₂/CMSs composite was obtained by coating MnO₂ onto the surface of carbon microspheres (CMSs), which were prepared by chemical vapor deposition and oxidized by a mixture of 0.1 mol/L KMnO₄ and 0.1 mol/L HNO₃. And then MnO₂/CMSs composite was washed by H₂C₂O₄ to obtain oxidized-CMSs. The morphology and structure of all samples were characterized by FESEM, TEM, XRD and so on. The dispersion of MnO₂/CMSs in water and ethanol was also investigated. The electrochemical property of the composite was measured by cyclic voltammetry. The results show that the MnO₂/CMSs composite with appropriate capacitance performance in neutral solution was synthesized using in-situ coating technique in KMnO₄ and HNO₃ solution, the loading of MnO₂ in the composite was about 60%, and the oxidized-CMSs with oxygen-containing functional groups on their surface have good dispersion in water and ethanol.
- carbon microspheres(CMSs) /
- MnO₂ /
- modification /
- composite /
- electrochemical property