储能科学与技术 ›› 2019, Vol. 8 ›› Issue (2): 248-259.doi: 10.12028/j.issn.2095-4239.2018.0220

• 进展与评述 • 上一篇    下一篇

基于二氧化锰/石墨烯复合材料的制备方法及在超级电容器上的研究进展

李伟, 侯朝霞, 李建君, 薄大明   

  1. 沈阳大学机械工程学院辽宁省新型功能材料与化学工艺重点实验室, 辽宁 沈阳 110044
  • 收稿日期:2018-11-05 修回日期:2018-12-25 出版日期:2019-03-01 发布日期:2019-03-01
  • 通讯作者: 侯朝霞。E-mail:Luckyxia2007@126.com
  • 作者简介:李伟(1991-),男,硕士研究生,研究方向为新型功能材料,E-mail:374421004@qq.com
  • 基金资助:
    国家自然科学基金(51472166),辽宁省“百千万人才工程”资助项目

Preparation methods and progress of manganese dioxide/graphene based composites in supercapacitors

LI Wei, HOU Zhaoxia, LI Jianjun, BO Daming   

  1. Liaoning Province Key Laboratory of New Functional Materials and Chemical Technology, School of Mechanical Engineering, Shenyang University, Shenyang 110044, Liaoning, China
  • Received:2018-11-05 Revised:2018-12-25 Online:2019-03-01 Published:2019-03-01

摘要: 综述了基于MnO2/石墨烯的二元、三元复合材料在超级电容器方面的最新研究进展。由于范德华力造成的堆叠,石墨烯实际比电容并不高。MnO2理论比电容高达1370 F/g,但因其赝电容受MnO2片层厚度的限制,实际比电容远小于理论值。将石墨烯和MnO2复合,MnO2纳米结构锚定在石墨烯纳米片之间充当间隔物,可以有效抑制石墨烯的堆叠,增强界面电荷转移,借助二者的协同效应有望实现高比电容、高电导率和良好的循环稳定性。介绍了MnO2/石墨烯复合材料的制备方法及电化学性能。对比分析了MnO2/石墨烯三元复合材料的电化学性能,由于金属氧化物或导电聚合物的引入,电化学性能进一步提升。最后总结指出基于MnO2/石墨烯的多元复合材料和器件还面临着安全可靠、规模化生产以及降成本等一系列问题。随着技术的不断成熟和突破,有望在工业、交通以及日常电子器件中获得应用。

关键词: 石墨烯, 二氧化锰, 复合材料, 超级电容器

Abstract: The latest research progress of MnO2/graphene based binary and ternary composites in supercapacitors are reviewed. Due to the stacking caused by van der Waals forces, the actual specific capacitance of graphene is not very high. The theoretical specific capacitance of MnO2 is as high as 1370 F/g, but its pseudo capacitance is limited by the thickness of MnO2, and the actual specific capacitance is much smaller than the theoretical value. The combination of graphene and MnO2, where MnO2 nanostructures anchored between graphene nanosheets as spacers, can effectively inhibit the stacking of graphene and enhance the interface charge transfer. With the synergistic effect of both functions, it is expected to achieve high specific capacitance and high conductivity and good cycling stability. The preparation method and electrochemical performance of MnO2/graphene composites are introduced. The electrochemical performance of MnO2/graphene ternary composites are analyzed. The introduction of metal oxides or conductive polymers can further improve the electrochemical performance. Finally, a series of issues for the application of MnO2/graphene-based multi-component composites and devices are analyzed, such as safety and reliability, large-scale production and cost reduction. With the mature and break-through of technology, it is expected to achieve applications in industry, transportation and daily electronics.

Key words: graphene, manganese dioxide, composites, supercapacitors

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