Electrochemical Zinc Ion Capacitors: Fundamentals, Materials, and Systems

An electrochemical zinc ion capacitor (ZIC) is a hybrid supercapacitor composed of a porous carbon cathode and a zinc anode. Based on the low‐cost features of carbon and zinc metal, ZIC is a potential candidate for safe, high‐power, and low‐cost energy storage applications. ZICs have gained tremendo...

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Veröffentlicht in:Advanced energy materials 2021-06, Vol.11 (21), p.n/a
Hauptverfasser: Yin, Jian, Zhang, Wenli, Alhebshi, Nuha A., Salah, Numan, Alshareef, Husam N.
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Sprache:eng
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Zusammenfassung:An electrochemical zinc ion capacitor (ZIC) is a hybrid supercapacitor composed of a porous carbon cathode and a zinc anode. Based on the low‐cost features of carbon and zinc metal, ZIC is a potential candidate for safe, high‐power, and low‐cost energy storage applications. ZICs have gained tremendous attention in recent years. However, the low energy densities and limited cycling stability are still major challenges for developing high‐performance ZICs. First, the energy density of ZIC is limited by the low capacitance of porous carbon cathodes. Second, aqueous electrolytes induce parasitic reactions, which results in limited voltage windows and poor cycling performances of ZICs. Third, the poor stabilities and low utilization of zinc anodes remain major challenges to develop practical ZICs. This review summarizes the recent progress in developing ZICs and highlights both the promising and challenging attributes of this emerging energy storage technology. Future research directions are proposed for developing better, lower cost, and more scalable ZICs for energy storage applications. Aqueous zinc ion capacitors (ZICs) are promising for next‐generation energy storage devices based on their merits of low cost, safety, long cycle life, and eco‐friendless. The charge storage mechanism and research progress in state‐of‐art ZICs are summarized. Potential research directions and approaches are proposed from fundamentals and materials to practical applications for high‐performance ZICs.
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.202100201