储能科学与技术 ›› 2020, Vol. 9 ›› Issue (4): 1030-1043.doi: 10.19799/j.cnki.2095-4239.2020.0041

• 储能材料与器件 • 上一篇    下一篇

石墨烯在锂离子电容器中的应用研究进展

刘腾宇1,2(), 张熊1,2(), 安亚斌1, 李晨1, 马衍伟1,2   

  1. 1.中国科学院电工研究所,北京 100190
    2.中国科学院大学,北京100049
  • 收稿日期:2020-01-16 修回日期:2020-03-19 出版日期:2020-07-05 发布日期:2020-06-30
  • 通讯作者: 张熊 E-mail:liutengyu@mail.iee.ac.cn;zhangxiong@mail.iee.ac.cn
  • 作者简介:刘腾宇(1994—),男,硕士研究生,主要研究方向为锂离子电容器电极材料,E-mail:liutengyu@mail.iee.ac.cn
  • 基金资助:
    国家自然科学基金项目(51677182)

Research progress on the application of graphene for lithium-ion capacitors

LIU"Tengyu1,2(), ZHANG"Xiong1,2(), AN"Yabin1, LI"Chen1, MA"Yanwei1,2   

  1. 1.Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
    2.University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-01-16 Revised:2020-03-19 Online:2020-07-05 Published:2020-06-30
  • Contact: Xiong ZHANG E-mail:liutengyu@mail.iee.ac.cn;zhangxiong@mail.iee.ac.cn

摘要:

锂离子电容器结合了锂离子电池和超级电容器的储能机理,综合了两者各自的优良性能,具有能量密度大、功率密度高、循环寿命长和安全性能好等优点,是目前电化学储能领域的研究热点。石墨烯是一种由碳原子以sp2杂化轨道组成六角型呈蜂巢晶格的二维碳纳米材料,具高比表面积、高导电性、高容量以及物理化学性质稳定等优点,被认为是下一代高性能锂离子电容器的理想电极材料。本文综述了石墨烯在锂离子电容器中的应用,介绍了其作为锂离子电容器正极与负极材料的电化学性能及优缺点,进一步阐明了石墨烯的比表面积、电导率及微观形貌等因素对其电化学性能的影响。此外,还介绍了元素掺杂石墨烯与石墨烯复合材料等改性手段,分析了石墨烯中的杂原子对其电负性、片层结构、活性位点及电化学性能的影响,并且分类总结了近期较为常见的几种石墨烯复合电极材料,进一步说明了改性石墨烯在锂离子电容器中的应用与进展,并在最后对石墨烯基锂离子电容器的发展前景进行了展望。

关键词: 锂离子电容器, 石墨烯, 能量密度, 功率密度

Abstract:

Lithium-ion capacitors (LICs) are hybrid energy storage devices that can bridge the gap between lithium-ion batteries and supercapacitors. Therefore, they have become a popular research topic owing to their advantages of high energy density, high power density, long cycle life, and good safety. Graphene, which is a two-dimensional (2D) honeycomb lattice of sp2-bonded carbon atoms, is promising for future applications in electrochemical energy storage fields because of its high specific surface area, high conductivity, high capacity, and stable physicochemical properties. In this study, a critical overview of the current progress related to the usage of graphene materials in LICs is presented. The effects of specific surface area, electrical conductivity, and micromorphology on the electrochemical performance of graphene were also summarized. In addition, a brief summary of the structural modification of the graphene electrode materials is presented, followed by a systematic examination of the usage of doped graphene and graphene-based composites as electrode materials in LICs. The effects of heteroatoms on the electronegativity, microstructure, active sites, and electrochemical properties of graphene are also analyzed. Finally, major challenges associated with the future applications of graphene materials in LICs are presented.

Key words: lithium-ion capacitors, graphene, energy density, power density

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