DataVXACS Energy LettersPaper
journal article·2024-06-14Open access

Molecular Catalysis Enables Fast Polyiodide Conversion for Exceptionally Long-Life Zinc–Iodine Batteries

Zihui Chen, Feifei Wang, Runlin Ma, Wanying Jiao, Deyuan Li, Ao Du, Zhijie Yan, Tianyu Yin, Xunjie Yin, Qiang Li, Xu Zhang, Nianjun Yang, Zhen Zhou, Quan-Hong Yang, Chunpeng Yang

ACS Energy Letters· Volume 9· Issue 6
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Source abstract

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.
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Research context

Energy storageCatalysis & surfaces

OpenAlex topics: Advanced battery technologies research · Advanced Battery Materials and Technologies · Advancements in Battery Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Nanoyang Group, Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage, School of Chemical Engineering and Technology, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300350, China

Interdisciplinary Research Center for Sustainable Energy Science and Engineering, School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China

Department of Chemistry, Hasselt University, 3590 Diepenbeek, Belgium

Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China

National Industry-Education Integration Platform of Energy Storage, Tianjin University, Tianjin 300072, China

Funding

Tianjin University · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Haihe Laboratory of Sustainable Chemical Transformations

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