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Updated: Feb 14, 2026

Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
Dual regulation of interface and bulk phase by a multifunctional additive for constructing stable zinc-sulfur
Xuewen Peng1, Caixiang Wang1, Qin Tang1
1National Base for International Science & Technology Cooperation of New Energy Equipment, Energy Storage Materials and Devices, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, School of Chemistry, Xiangtan University, Xiangtan 411105, Hunan, China. 202221531824@smail.xtu.edu.cn.
Abstract:
This work employs polyvinylpyrrolidone (PVP) as a multifunctional electrolyte additive. On one hand, PVP molecules, with their highly electronegative carbonyl groups, spontaneously adsorb onto the Zn anode surface to form a selective protective film. This film inhibits corrosion from reactive species and enables homogeneous Zn plating/stripping. On the other hand, PVP disrupts the native "micelle-like" solvation sheath of Zn2+, thereby achieving fast desolvation kinetics. This concurrent regulation of both interface and bulk phase presents a promising direction for Zinc-Sulfur Batteries.
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Conjugate addition results in a thermodynamically stable product. The reaction retains the stronger C=O bond at the expense of the weaker C=C π bond. The process is slow as the β carbon is less electrophilic than the carbonyl carbon.
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