Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (4): 1030-1043.doi: 10.19799/j.cnki.2095-4239.2020.0041

• Energy Storage Materials and Devices • Previous Articles     Next Articles

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

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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