Supercapacitor and supercapattery as emerging electrochemical energy stores

By G. Chen. 2017

653 citations recorded by the source corpus.

This article reviews critically selected recent literature on electrochemical energy storage (EES) technologies, focusing on supercapacitor and also supercapattery which is a generic term for various hybrid devices combining the merits of rechargeable battery and supercapacitor. Fundamentals of EES are explained, aiming at clarification of some literature confusions such as the differences between capacitive and non-capacitive Faradaic charge storage mechanisms, and between cathode and positive electrode (positrode), and between anode and negative electrode (negatrode). In particular, the concept and origin of pseudocapacitance are qualitatively correlated with the band model for semiconductors. Strategies for design and construction of supercapattery are discussed in terms of both the materials structures and device engineering. Selection of materials, including electrolytes, is another topic reviewed selectively. Graphenes and carbon nanotubes are the favourable choice to composite with both capacitive and non-capacitive redox materials for improved kinetics of charge storage processes and charge–discharge cycling stability. Organoaqueous electrolytes show a great potential to enable EES to work at sub-zero temperatures, while solid ion conducting membranes and ionic liquids can help develop high voltage (>4.0 V) and hence high energy supercapatteries.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/86a126d6f392bb81d1286293ef33abe2b69bf73b

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In Electrical and Electronic Engineering

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Citations in the corpus

Reviewing the fundamentals of supercapacitors and the difficulties involving the analysis of the electrochemical findings obtained for porous electrode materials (2020, methodology): “The fundamentals of the electrochemical energy storage devices were recently reviewed by Chen [22], focusing on the clari ﬁ cation of some literature confusions such as the differences between capacitive and non-capacitive Faradaic charge-storage mechanisms, and between the cathode and a positive…”
Supercapatteries as High-Performance Electrochemical Energy Storage Devices (2020, background): “In order to comprehensively discuss these hybrid devices, several hypothetical supercapatteries were constructed by us [27] to illustrate their performance by using corresponding GCD plots one by one (Fig.”
Renewable biomass‐derived carbons for electrochemical capacitor applications (2021, background): “Almost all carbon precursors based onhard or soft carbon can be activated by the extremeKOH etching effect during the reaction between KOH and carbon at higher activation temperature (>750 C, Equations (3)–(5)).”