Ionic buffer layer design for stabilizing Zn electrodes in aqueous Zn-based batteries
Aqueous Zn-based batteries (AZBs) are hindered by issues associated with the Zn electrodeposition process (ZEDP) on electrode surfaces, including passivation, dendrite formation, and hydrogen evolution. One of the important reasons is the drastic fluctuation in the concentration of Zn2+ ions on the...
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KeAi Communications Co. Ltd.
2024-11-01
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| Series: | Materials Reports: Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S266693582400065X |
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| author | Yifan Cui Yanyi Ma Zhongxi Zhao Jianwen Yu Yongtang Chen Yi He Peng Tan |
| author_facet | Yifan Cui Yanyi Ma Zhongxi Zhao Jianwen Yu Yongtang Chen Yi He Peng Tan |
| author_sort | Yifan Cui |
| collection | DOAJ |
| description | Aqueous Zn-based batteries (AZBs) are hindered by issues associated with the Zn electrodeposition process (ZEDP) on electrode surfaces, including passivation, dendrite formation, and hydrogen evolution. One of the important reasons is the drastic fluctuation in the concentration of Zn2+ ions on the electrode surface during the charging and discharging process. In this work, an electrolyte with Zn2+ ion buffer layer (EZIBL) is proposed to regulate the ZEDP. First, numerical simulations and corresponding experiments are conducted to assess the impact of different thicknesses of the Zn2+ ion buffer layer (ZIBL) on the variation in Zn2+ ion concentration, from which the optimal thickness of the ZIBL is determined. Then, the regulation role of EZIBL in the cycling process is demonstrated by a Zn-Cu half cell. Further, combined with the potential profile of the symmetric cell and the experimental phenomena, the regulation role of EZIBL in ZEDP is systematically explained at the mechanistic level through the analysis of key parameters. Finally, a full battery composed of Zn-LiMn2O4 is assembled to evaluate the practical applicability of the EZIBL in real battery cycles, which shows great enhancement in capacity retention and coulombic efficiency. This work proposes the design of the EZIBL used to regulate the ZEDP and provides a simple, low-cost regulation method for the development of high-performance AZBs. |
| format | Article |
| id | doaj-art-41a0bfa8822e4f41bd2804fc476c7603 |
| institution | OA Journals |
| issn | 2666-9358 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Materials Reports: Energy |
| spelling | doaj-art-41a0bfa8822e4f41bd2804fc476c76032025-08-20T02:07:31ZengKeAi Communications Co. Ltd.Materials Reports: Energy2666-93582024-11-014410029210.1016/j.matre.2024.100292Ionic buffer layer design for stabilizing Zn electrodes in aqueous Zn-based batteriesYifan Cui0Yanyi Ma1Zhongxi Zhao2Jianwen Yu3Yongtang Chen4Yi He5Peng Tan6Department of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei, 230026, Anhui, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei, 230026, Anhui, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei, 230026, Anhui, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei, 230026, Anhui, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei, 230026, Anhui, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei, 230026, Anhui, China; Corresponding author.Department of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei, 230026, Anhui, China; State Key Laboratory of Fire Science, University of Science and Technology of China (USTC), Hefei, Anhui, 230026, China; Corresponding author. Department of Thermal Science and Energy Engineering, University of Science and Technology of China (USTC), Hefei, 230026, Anhui, China.Aqueous Zn-based batteries (AZBs) are hindered by issues associated with the Zn electrodeposition process (ZEDP) on electrode surfaces, including passivation, dendrite formation, and hydrogen evolution. One of the important reasons is the drastic fluctuation in the concentration of Zn2+ ions on the electrode surface during the charging and discharging process. In this work, an electrolyte with Zn2+ ion buffer layer (EZIBL) is proposed to regulate the ZEDP. First, numerical simulations and corresponding experiments are conducted to assess the impact of different thicknesses of the Zn2+ ion buffer layer (ZIBL) on the variation in Zn2+ ion concentration, from which the optimal thickness of the ZIBL is determined. Then, the regulation role of EZIBL in the cycling process is demonstrated by a Zn-Cu half cell. Further, combined with the potential profile of the symmetric cell and the experimental phenomena, the regulation role of EZIBL in ZEDP is systematically explained at the mechanistic level through the analysis of key parameters. Finally, a full battery composed of Zn-LiMn2O4 is assembled to evaluate the practical applicability of the EZIBL in real battery cycles, which shows great enhancement in capacity retention and coulombic efficiency. This work proposes the design of the EZIBL used to regulate the ZEDP and provides a simple, low-cost regulation method for the development of high-performance AZBs.http://www.sciencedirect.com/science/article/pii/S266693582400065XZn electrodeposition processZn2+ ion buffer layerPotential profileNumerical modelingOptical observation |
| spellingShingle | Yifan Cui Yanyi Ma Zhongxi Zhao Jianwen Yu Yongtang Chen Yi He Peng Tan Ionic buffer layer design for stabilizing Zn electrodes in aqueous Zn-based batteries Materials Reports: Energy Zn electrodeposition process Zn2+ ion buffer layer Potential profile Numerical modeling Optical observation |
| title | Ionic buffer layer design for stabilizing Zn electrodes in aqueous Zn-based batteries |
| title_full | Ionic buffer layer design for stabilizing Zn electrodes in aqueous Zn-based batteries |
| title_fullStr | Ionic buffer layer design for stabilizing Zn electrodes in aqueous Zn-based batteries |
| title_full_unstemmed | Ionic buffer layer design for stabilizing Zn electrodes in aqueous Zn-based batteries |
| title_short | Ionic buffer layer design for stabilizing Zn electrodes in aqueous Zn-based batteries |
| title_sort | ionic buffer layer design for stabilizing zn electrodes in aqueous zn based batteries |
| topic | Zn electrodeposition process Zn2+ ion buffer layer Potential profile Numerical modeling Optical observation |
| url | http://www.sciencedirect.com/science/article/pii/S266693582400065X |
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