journal article·2024-12

Cation Adsorption Engineering Enables Dual Stabilizations for Fast‐Charging Zn─I2 Batteries

Xiaoqiao Liao, Zhe Zhu, Yaqi Liao, Kai Fu, Yixue Duan, Linfeng Lv, Leixin Wu, Wenwu Wang, Xin He, Kai Yang, Peng Tian, Wenlong Cai, Chuan Zhao, Hui Tang, Liang He

Advanced Energy Materials· Volume 14· Issue 47
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Abstract

Abstract Aqueous zinc‐iodine (Zn─I2) battery is a promising energy storage system due to its inherent safety, high theoretical capacity, sustainability, and cost‐effectiveness. However, the shuttle effect of polyiodide severely affects the stable loading of active iodine and even accelerates the corrosion of the Zn anode, thus impeding its further advancement. Herein, a unique trimethylsulfonium cation (TMS+) with strong adsorption is proposed to stabilize both the iodine cathode and Zn anode. Benefiting from the robust interaction between TMS+ and polyiodide, the electrolyte can effectively immobilize large‐capacity iodine in the form of oily precipitate, thus avoiding the shuttle effect of polyiodide and the Zn corrosion. Additionally, TMS+ can be preferentially adsorbed on various Zn facets, inducing an electrostatic shielding effect to inhibit Zn dendrite growth. Consequently, Zn anode can be stably cycled over 3400 h at 5 mA cm−2/5 mAh cm−2, and a large areal capacity of 2.71 mAh cm−2 as well as long‐life stability over 6400 cycles is achieved for Zn─I2 battery. Furthermore, cation adsorption engineering is practically utilized in pouch cells, realizing superior fast‐charging stability over 790 cycles. This electrolyte modification with dual stabilizations is anticipated to be applied to other metal‐iodine batteries as a cost‐effective, facile, and safe strategy.
Source: crossref · Quality: baseline

Research context

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

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

Affiliations

School of Mechanical Engineering State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering Sichuan University Chengdu 610065 P. R. China

School of Chemistry Faculty of Science University of New South Wales Sydney New South Wales 2052 Australia

State Key Laboratory of Material Processing and Die and Mold Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China

School of Materials Science and Engineering Nanchang Hangkong University Nanchang 330000 P. R. China

College of Materials Science and Engineering Sichuan University Chengdu 610064 P. R. China

School of Materials and Energy University of Electronic Science and Technology of China Chengdu 611731 P. R. China

Med+X Center for Manufacturing West China Hospital Sichuan University Chengdu 610041 P. R. China

Yibin Industrial Technology Research Institute of Sichuan University Yibin R&D Park of Sichuan University Yibin 644005 P. R. China

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities

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