Promoting Zn2+migration through polar perovskite dielectric layer on Zn metal anode for the enhanced aqueous Zn-ion batteries
- Authors
- Ko, Jaewook; So, Seongjoon; Kim, Minju; Kim, Il Tae; Ahn, Yong Nam; Hur, Jaehyun
- Issue Date
- Apr-2023
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Strontium titanate; High dielectric-perovskite; Promoting ion migration; Anode; Aqueous zinc-ion batteries
- Citation
- CHEMICAL ENGINEERING JOURNAL, v.462
- Journal Title
- CHEMICAL ENGINEERING JOURNAL
- Volume
- 462
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/87727
- DOI
- 10.1016/j.cej.2023.142308
- ISSN
- 1385-8947
- Abstract
- Aqueous zinc-ion batteries (AZIBs) have gained significant attention as promising next-generation energy storage systems owing to their prominent features such as low cost, environmental friendliness, high theoretical capacity (819 mAh g- 1 and 5849 mAh cm- 2), and low redox potential (-0.762 V vs. standard hydrogen evolution). However, several challenges to Zn metal anodes, such as uncontrollable dendritic growth, hydrogen evolution, and corrosion reactions in water-based electrolytes, result in unstable and poorly reversible electrochemical performance. Herein, we demonstrate a highly polar perovskite SrTiO3 (STO) layer introduced on Zn metal as an artificial layer promotes Zn2+ migration and suppresses the random dendrite growth in the mild aqueous electrolyte. STO-coated Zn anode (STO@Zn) highly improves the reversibility of electrochemical reaction in a symmetrically configured cell relative to bare Zn, with a significantly lower overpotential of 4000 h. Various electrochemical characterizations show uniform and rapid Zn2+ transport via the artificial STO layer. A full-cell test with VO2 cathode confirmed the excellent properties of STO@Zn, demonstrating reversible and stable performance with long service life. This study presents new insights into the design and development of promising Zn metal anodes for next-generation energy storage systems.
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