Highly Reversible Tin Film Anode Guided via Interfacial Coordination Effect for High Energy Aqueous Acidic Batteries

Author:

Xu Diyu1,Zhang Haozhe2,Xie Jinhao1,Zhou Lijun1,Yang Fan1,Ma Jianfeng3,Yu Yanxia1,Wang Guizhen4,Lu Xihong1ORCID

Affiliation:

1. MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low‐carbon Chem & Energy Conservation of Guangdong Province School of Chemistry Sun Yat‐Sen University Guangzhou 510275 P. R. China

2. Pritzker School of Molecular Engineering University of Chicago Chicago IL 60637 USA

3. Department of Biomaterials International Centre for Bamboo and Rattan Beijing 100102 P. R. China

4. State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and Engineering Collaborative Innovation Center of Ecological Civilization Hainan University Haikou Hainan 570228 P. R. China

Abstract

AbstractSn metal is a preferable choice as anode material for aqueous acidic batteries due to its acid‐tolerance, non‐toxicity, and ease of recycling. However, the large size and irregular deposition morphology of polyhedral Sn particles are bad for constructing stable and high‐capacity Sn metal anode because of severe hydrogen evolution and metal shedding. To tackle this critical issue, 4‐tert‐octylphenol pentaethoxylate (POPE) is used as an electrolyte additive to generate a thin‐film Sn anode with reversible stripping/plating behavior. POPE can not only induce homogeneous surface chemistry by adsorbing on the Sn surface via coordination bonds but also inhibit hydrogen evolution by modulating the solvation shell of Sn2+. The Sn film anode delivers improved electrochemical stability over 480 h with satisfactory rate performance and low polarization. Moreover, the as‐assembled PbO2//Sn battery can also provide outstanding durability at 10 mAh cm−2. This work offers new inspiration for developing a reversible Sn metal film anode.

Publisher

Wiley

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