Volume 5, Issue 9 e202200237
Perspective

Toward High Energy Density Aqueous Zinc-Ion Batteries: Recent Progress and Future Perspectives

Sangyeop Lee

Sangyeop Lee

Division of Advanced Materials Science and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Cheongam-ro, Nam-gu, Pohang, 37673 Republic of Korea

Contribution: Conceptualization (equal), Writing - original draft (equal)

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Jongha Hwang

Jongha Hwang

Department of Polymer Science and Engineering, Chungnam National University, Daehak-ro, Yuseong-gu, Daejeon, 34134 Republic of Korea

Contribution: ​Investigation (equal), Writing - original draft (equal)

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Prof. Woo-Jin Song

Corresponding Author

Prof. Woo-Jin Song

Department of Polymer Science and Engineering, Chungnam National University, Daehak-ro, Yuseong-gu, Daejeon, 34134 Republic of Korea

Contribution: Conceptualization (lead), Writing - original draft (lead), Writing - review & editing (equal)

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Prof. Soojin Park

Corresponding Author

Prof. Soojin Park

Division of Advanced Materials Science and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Cheongam-ro, Nam-gu, Pohang, 37673 Republic of Korea

Contribution: Conceptualization (lead), Project administration (lead), Writing - original draft (lead), Writing - review & editing (lead)

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First published: 27 July 2022
Citations: 3

Graphical Abstract

Towards high-voltage ZIBs: Aqueous zinc-ion batteries (ZIBs) are promising alternatives for conventional batteries due to their safety, economic benefits, and facile manufacturing processes. However, they show insufficient energy density related with low operating potential which restricts practical utilization in turn. In this perspective, we provide as-reported strategies to develop high-voltage aqueous ZIBs and propose guidelines to attain advanced zinc-based system.

Abstract

Aqueous zinc-ion batteries (ZIBs) are promising next-generation battery system which can mitigate the prevailing issues on the conventional lithium-ion batteries. However, insufficient energy density with low operating voltage prevents the practical utilization of the aqueous system. Notably, aqueous ZIBs suffer from electrolyte decomposition due to its narrow electrochemical stability window (ESW) for 1.23 V. Also, studies on cathode active materials that store charge at an elevated voltage region is still in the initial stage. In this perspective, we cover the recent strategies for developing high-voltage aqueous ZIBs. First, electrolyte designs for expanding the ESW of an aqueous electrolyte are introduced based on their characterization, materials, and working mechanisms. Next, we propose the cathode active materials with high-working voltage. Furthermore, studies on zinc anodes are also briefly presented. Lastly, we summarize the as-reported strategies and provide insight for developing future ZIBs.

Conflict of interest

The authors declare no conflict of interest.