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https://hdl.handle.net/2440/131335
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Type: | Journal article |
Title: | Designing dendrite-free zinc anodes for advanced aqueous zinc batteries |
Author: | Hao, J. Li, X. Zhang, S. Yang, F. Zeng, X. Zhang, S. Bo, G. Wang, C. Guo, Z. |
Citation: | Advanced Functional Materials, 2020; 30(30):2001263-1-2001263-10 |
Publisher: | Wiley |
Issue Date: | 2020 |
ISSN: | 1616-301X 1616-3028 |
Statement of Responsibility: | Junnan Hao, Xiaolong Li, Shilin Zhang, Fuhua Yang, Xiaohui Zeng, Shuai Zhang ... et al. |
Abstract: | Zn metal has been regarded as the most promising anode for aqueous batteries due to its high capacity, low cost, and environmental benignity. Zn anode still suffers, however, from low Coulombic efficiency due to the side reactions and dendrite growth in slightly acidic electrolytes. Here, the Zn plating/stripping mechanism is thoroughly investigated in 1 m ZnSO4 electrolyte, demonstrating that the poor performance of Zn metal in mild electrolyte should be ascribed to the formation of a porous by-product (Zn4SO4(OH)6·xH2O) layer and serious dendrite growth. To suppress the side reactions and dendrite growth, a highly viscoelastic polyvinyl butyral film, functioning as an artificial solid/electrolyte interphase (SEI), is homogeneously deposited on the Zn surface via a simple spin-coating strategy. This dense artificial SEI film not only effectively blocks water from the Zn surface but also guides the uniform stripping/plating of Zn ions underneath the film due to its good adhesion, hydrophilicity, ionic conductivity, and mechanical strength. Consequently, this side-reaction-free and dendrite-free Zn electrode exhibits high cycling stability and enhanced Coulombic efficiency, which also contributes to enhancement of the full-cell performance when it is coupled with MnO2 and LiFePO4 cathodes. |
Rights: | © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
DOI: | 10.1002/adfm.202001263 |
Grant ID: | http://purl.org/au-research/grants/arc/FT150100109 http://purl.org/au-research/grants/arc/DP170102406 http://purl.org/au-research/grants/arc/DE190100504 |
Published version: | http://dx.doi.org/10.1002/adfm.202001263 |
Appears in Collections: | Aurora harvest 8 Chemistry and Physics publications |
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