Dual-plating aqueous Zn-iodine batteries enabled by halogen-complexation chemistry for large-scale energy storage
Aqueous Zn-I2 batteries are promising candidates for grid-scale energy storage due to their low cost, high voltage output and high safety. However, Ah-level Zn-I2 batteries have been rarely realized due to formidable issues including polyiodide shuttling and zinc dendrites. Here, we develop 10 Ah du...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2025
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| Online Access: | https://hdl.handle.net/10356/182657 |
| _version_ | 1826121032096808960 |
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| author | Li, Hong Huang, Bosi Chuai, Mingyan Zheng, Zhiyang Chen, Hao Piao, Zhihong Zhou, Guangmin Fan, Hong Jin |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Li, Hong Huang, Bosi Chuai, Mingyan Zheng, Zhiyang Chen, Hao Piao, Zhihong Zhou, Guangmin Fan, Hong Jin |
| author_sort | Li, Hong |
| collection | NTU |
| description | Aqueous Zn-I2 batteries are promising candidates for grid-scale energy storage due to their low cost, high voltage output and high safety. However, Ah-level Zn-I2 batteries have been rarely realized due to formidable issues including polyiodide shuttling and zinc dendrites. Here, we develop 10 Ah dual-plating Zn-I₂ batteries (DPZIB) by employing ZnIxG4(tetraglyme) complex chemistry, in which zinc and iodine are iteratively dissolved and deposited in the aqueous electrolyte. The battery contains no membrane or high-cost electrolytes. The G4 strengthens the Zn-I bond by acting as an electron donor, and meanwhile, it enhances the reductivity of electrolyte by its complexation with Zn2+. Such halogen-complexation chemistry endows static DPZIB with shuttle-free property, negligible self-discharge, and minimal zinc dendrites. The battery delivers a capacity of 301.5 mAh over 1800 h at 5 mA cm-2, a low capacity decay (0.028% drop per cycle for 800 cycles at 25 mA cm-2), and a scalable capacity of up to 10.8 Ah. As a proof of concept, we demonstrate an integrated system encompassing a membrane-free Zn-I2 flow battery to store solar electricity at daytime and power electronics at nights. |
| first_indexed | 2025-03-09T12:52:06Z |
| format | Journal Article |
| id | ntu-10356/182657 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-03-09T12:52:06Z |
| publishDate | 2025 |
| record_format | dspace |
| spelling | ntu-10356/1826572025-02-17T15:36:14Z Dual-plating aqueous Zn-iodine batteries enabled by halogen-complexation chemistry for large-scale energy storage Li, Hong Huang, Bosi Chuai, Mingyan Zheng, Zhiyang Chen, Hao Piao, Zhihong Zhou, Guangmin Fan, Hong Jin School of Physical and Mathematical Sciences Energy Research Institute @ NTU (ERI@N) Physics Zn-I2 batteries Halogen-complexation chemistry Aqueous Zn-I2 batteries are promising candidates for grid-scale energy storage due to their low cost, high voltage output and high safety. However, Ah-level Zn-I2 batteries have been rarely realized due to formidable issues including polyiodide shuttling and zinc dendrites. Here, we develop 10 Ah dual-plating Zn-I₂ batteries (DPZIB) by employing ZnIxG4(tetraglyme) complex chemistry, in which zinc and iodine are iteratively dissolved and deposited in the aqueous electrolyte. The battery contains no membrane or high-cost electrolytes. The G4 strengthens the Zn-I bond by acting as an electron donor, and meanwhile, it enhances the reductivity of electrolyte by its complexation with Zn2+. Such halogen-complexation chemistry endows static DPZIB with shuttle-free property, negligible self-discharge, and minimal zinc dendrites. The battery delivers a capacity of 301.5 mAh over 1800 h at 5 mA cm-2, a low capacity decay (0.028% drop per cycle for 800 cycles at 25 mA cm-2), and a scalable capacity of up to 10.8 Ah. As a proof of concept, we demonstrate an integrated system encompassing a membrane-free Zn-I2 flow battery to store solar electricity at daytime and power electronics at nights. Ministry of Education (MOE) National Research Foundation (NRF) Submitted/Accepted version The authors appreciate the financial support from the National Research Foundation, Singapore, under its Singapore–China Joint Flagship Project (Clean Energy) and the Singapore Ministry of Education, under its AcRF Tier 1 project (RT8/22). Joint Funds of the National Key Research and Development Program of China (2019YFA0705703), Shenzhen Science and Technology Program (KQTD20210811090112002), and the Overseas Research Co-operation Fund of Tsinghua Shenzhen International Graduate School. M.Y. Chuai thanks the financial support from Postdoctoral Fellowship Program (GZC20232668). 2025-02-14T07:49:05Z 2025-02-14T07:49:05Z 2025 Journal Article Li, H., Huang, B., Chuai, M., Zheng, Z., Chen, H., Piao, Z., Zhou, G. & Fan, H. J. (2025). Dual-plating aqueous Zn-iodine batteries enabled by halogen-complexation chemistry for large-scale energy storage. Energy & Environmental Science. https://dx.doi.org/10.1039/D5EE00027K 1754-5692 https://hdl.handle.net/10356/182657 10.1039/D5EE00027K en RT8/22 Energy & Environmental Science © 2025 The Author(s). This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. application/pdf |
| spellingShingle | Physics Zn-I2 batteries Halogen-complexation chemistry Li, Hong Huang, Bosi Chuai, Mingyan Zheng, Zhiyang Chen, Hao Piao, Zhihong Zhou, Guangmin Fan, Hong Jin Dual-plating aqueous Zn-iodine batteries enabled by halogen-complexation chemistry for large-scale energy storage |
| title | Dual-plating aqueous Zn-iodine batteries enabled by halogen-complexation chemistry for large-scale energy storage |
| title_full | Dual-plating aqueous Zn-iodine batteries enabled by halogen-complexation chemistry for large-scale energy storage |
| title_fullStr | Dual-plating aqueous Zn-iodine batteries enabled by halogen-complexation chemistry for large-scale energy storage |
| title_full_unstemmed | Dual-plating aqueous Zn-iodine batteries enabled by halogen-complexation chemistry for large-scale energy storage |
| title_short | Dual-plating aqueous Zn-iodine batteries enabled by halogen-complexation chemistry for large-scale energy storage |
| title_sort | dual plating aqueous zn iodine batteries enabled by halogen complexation chemistry for large scale energy storage |
| topic | Physics Zn-I2 batteries Halogen-complexation chemistry |
| url | https://hdl.handle.net/10356/182657 |
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