Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/43068
Title: Molecular Catalysis Enables Fast Polyiodide Conversion for Exceptionally Long-Life Zinc-Iodine Batteries
Authors: Chen, Zihui
Wang, Feifei
Ma, Runlin
Jiao, Wanying
Li, Deyuan
Du, Ao
Yan, Zhijie
Yin, Tianyu
Yin, Xunjie
Li , Qiang
Zhang, Xu
Zhou, Zhen
YANG, Nianjun 
Yang, Quan-Hong
Yang, Chunpeng
Issue Date: 2024
Publisher: AMER CHEMICAL SOC
Source: ACS Energy Letters, , p. 2858 -2866
Status: Early view
Abstract: Zinc-iodine (Zn-I-2) batteries hold great promise for high-performance, low-cost electrochemical energy storage, but their practical application faces thorny challenges associated with polyiodide shuttling and insufficient cycling stability. Herein, we propose molecular catalysis for long-life Zn-I-2 batteries, employing Hemin as an efficient and stable molecular catalyst. The Hemin molecules containing pentacoordinated iron sites significantly adsorb polyiodides, improve the conversion kinetics of iodine species, reduce triiodide concentration, and suppress polyiodide shuttling. Benefiting from molecular catalysis, the Zn-I-2 batteries demonstrate an exceptional cycling life, exceeding 62000 cycles with only 0.00052% decay per cycle while maintaining discharge voltage plateaus. The pivotal function of molecular catalysis in both the adsorption and conversion of polyiodide species shows its significant impact on improving the cycling lifespan of Zn-I-2 batteries toward long-life energy storage.
Notes: Yang, QH; Yang, CP (corresponding author), Tianjin Univ, Tianjin Key Lab Adv Carbon & Electrochem Energy St, Sch Chem Engn & Technol, Nanoyang Grp, Tianjin 300350, Peoples R China.; Yang, QH; Yang, CP (corresponding author), Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300350, Peoples R China.; Zhang, X (corresponding author), Zhengzhou Univ, Interdisciplinary Res Ctr Sustainable Energy Sci &, Sch Chem Engn, Zhengzhou 450001, Peoples R China.; Yang, QH (corresponding author), Haihe Lab Sustainable Chem Transformat, Tianjin 300192, Peoples R China.; Yang, QH (corresponding author), Tianjin Univ, Natl Ind Educ Integrat Platform Energy Storage, Tianjin 300072, Peoples R China.
zzuzhangxu@zzu.edu.cn; qhyangcn@tju.edu.cn; cpyang@tju.edu.cn
Document URI: http://hdl.handle.net/1942/43068
ISSN: 2380-8195
e-ISSN: 2380-8195
DOI: 10.1021/acsenergylett.4c00992
ISI #: 001228094800001
Category: A1
Type: Journal Contribution
Appears in Collections:Research publications

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