articleAdvanced Energy MaterialsFeb 27, 2024BRONZE OA

A Bifunctional Electrolyte Additive Features Preferential Coordination with Iodine toward Ultralong‐Life Zinc–Iodine Batteries

Tianjin University · National University of Singapore · +3 more institutions

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Abstract

Abstract Aqueous zinc–iodine (Zn‐I 2 ) battery is one of the most promising candidates for large‐scale energy storage due to its cost‐effectiveness, environmental friendliness, and recyclability. Its practical application is hindered by challenges including polyiodide “shuttle effect” in the cathode and anode corrosion. In this study, a zinc pyrrolidone carboxylate bifunctional additive is introduced to simultaneously tackle the issues of the polyiodide and Zn anode. It is revealed that the pyrrolidone carboxylate anions decrease the polyiodide concentration by preferential coordination between the pyrrolidone carboxylate anions and I 2 based on the Lewis acid‐base effect, suppressing the shuttle effect and…

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