Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (6): 1865-1873.doi: 10.19799/j.cnki.2095-4239.2022.0174

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Compact energy storage: Methodology with graphenes and the applications

HAN Junwei1,2,6(), XIAO Jing1,3,6, TAO Ying1,3, KONG Debin4,6, LV Wei2, YANG Quanhong1,3,5,6()   

  1. 1.School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
    2.Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, Guangdong, China
    3.Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
    4.College of New Energy, China University of Petroleum (East China), Qingdao 266580, Shandong, China
    5.Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, Fujian, China
    6.Tianmu Lake Institute of Advanced Energy Storage Technologies, Liyang 213300, Jiangsu, China
  • Received:2022-03-30 Revised:2022-04-27 Online:2022-06-05 Published:2022-06-13
  • Contact: YANG Quanhong E-mail:hardway@tju.edu.cn;qhyangcn@tju.edu.cn

Abstract:

The only way to address the emerging "space anxiety" in rapidly developing energy storage devices is through "compact energy storage," or storing as much energy as possible in the smallest possible space. Carbon materials assembled from graphene basic units can be used as key components in electrodes to promote electrochemical reactions and play an important role in optimizing electrode and battery volumetric performance. This review summarizes the significance of compact energy storage in rechargeable batteries as well as the major challenges. We propose a compact energy storage methodology based on the dense self-assembly process of graphenes, as well as its application in high-volumetric-capacitor electrodes, and then extend it to build compact high-energy rechargeable batteries, particularly lithium-ion batteries. To achieve compact energy storage from materials to electrodes and devices, the strategy of densifying the electrodes using customized carbon structures is highlighted. For future development, special concerns about cycling stability, fast charging, and thermal safety under practical working conditions in compact batteries are discussed.

Key words: compact energy storage, lithium-ion batteries, volumetric energy density, carbon, graphene

CLC Number: