Battery and/or supercapacitor?—On the merger of two electrochemical storage system families

Yuping Wu; Rudolf Holze

doi:10.59400/esc.v2i1.491

Yuping Wu Confucius Energy Storage Lab, School of Energy and Environment, Southeast University, Nanjing 210096, China
Rudolf Holze Confucius Energy Storage Lab, School of Energy and Environment, Southeast University, Nanjing 210096, China;Chemnitz University of Technology, 09107 Chemnitz, Germany;Institute of Chemistry, Saint Petersburg State University, Petersburg 199034, Russia; School of Energy and Environment, Southeast University, Nanjing 210096, China http://orcid.org/0000-0002-3516-1918

Article ID: 491

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DOI: https://doi.org/10.59400/esc.v2i1.491

Keywords: battery electrodes; supercapacitor electrodes; capacitive behavior; pseudocapacitive behavior; electrochemical energy storage; electrochemical energy conversion

Abstract

Similarities and analogies between materials, structures, operating and construction principles of secondary batteries and supercapacitors and their electrodes are presented, named, and reviewed in context. On the material level, several materials used both in batteries and supercapacitors are addressed, and implications from observations made in one application for the other are highlighted. On the electrode level, a continuous change of architectural details is observed when going from an electrode with high charge storage capability to an electrode supporting high currents is detected; again, this overlap provides instructive ideas for both fields. On the cell level, combinations of electrodes from both fields yielding hybrid devices are an obvious outcome again, with implications for both fields. Ideas and suggestions for further research and development based on a deeper exchange between both families are developed.

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