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Understanding the charging of supercapacitors by electrochemical quartz crystal microbalance

  • Supercapacitors are highly valued energy storage devices with high power density, fast charging ability, and exceptional cycling stability. A profound understanding of their charging mechanisms is crucial for continuous performance enhancement. Electrochemical quartz crystal microbalance (EQCM), a detection means that provides in situ mass change information during charging–discharging processes at the nanogram level, has received greatly significant attention during the past decade due to its high sensitivity, non-destructiveness and low cost. Since being used to track ionic fluxes in porous carbons in 2009, EQCM has played a pivotal role in understanding the charging mechanisms of supercapacitors. Herein, we review the critical progress of EQCM hitherto, including theory fundamentals and applications in supercapacitors. Finally, we discuss the fundamental effects of ion desolvation and transport on the performance of supercapacitors. The advantages and defects of applying EQCM in supercapacitors are thoroughly examined, and future directions are proposed.

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Document Type:Article
Author:Liang NiuORCiD, Long Yang, Jingjing Yang, Ming ChenORCiD, Liang Zeng, Pan Duan, Taizheng WuORCiD, Emmanuel PametéORCiD, Volker PresserORCiD, Guang FengORCiD
Parent Title (English):Industrial Chemistry & Materials
First Page:175
Last Page:187
Year of first Publication:2023
Release Date:2023/06/01
Funding Information:National Natural Science Foundation of China (52161135104 and 52106090); Hubei Provincial Natural Science Foundation of China (2020CFA093)
DDC classes:600 Technik, Medizin, angewandte Wissenschaften / 660 Technische Chemie
Open Access:Open Access
Signature:INM 2023/068
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International