Commercially available ionic liquids enable high-performance of aqueous zinc-iodine batteries: Sequestered nitrogen-sites for efficient electrocatalytic iodine conversion

Xinyu Chen, Yuwei Zhao, Yunshan Zheng, Huifang Xu, Qingbin Jiang, Tianyu Chen, Kwan San Hui, Kwun Nam Hui, Linghai Zhang, Chenyang Zha

Research output: Contribution to journalArticlepeer-review

Abstract

The high performance of aqueous zinc-iodine batteries is limited by the soluble polyiodide shuttling and sluggish redox kinetics. Various strategies have been proposed to address these issues, but most of these optimizing strategies either add additional hurdles to the manufacturing process or require materials that are not currently commercially available. Herein, we take advantage of commercial 1,2-dimethyl-3-propylimidazolium iodide to serve as a redox reaction catalyst for the activation of iodine cathodes without any other material modification. Due to the strong bonding coordination between 1,2-dimethyl-3-propylimidazolium iodide and the polyiodides, the as-prepared cell has a high specific capacity (147 mAh/g) at 50 C, and ultralong cycling performance (20000 cycles) with better capacity retention. This work introduces an effective and commercial material that enables bringing aqueous rechargeable zinc iodine batteries to the practical energy market.
Original languageEnglish
Pages (from-to)16892-16900
Number of pages9
JournalJournal of Materials Chemistry A
Volume12
Issue number27
Early online date3 Jun 2024
DOIs
Publication statusE-pub ahead of print - 3 Jun 2024

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