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Updated: Oct 7, 2026

Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
Molecular Configuration Engineering of Electrolyte Additives Enables Adaptive Zinc Anodes and Highly Reversible Zn-S
Long Yu1, Yinfeng Guo1, Xiaoqing Zhu1
1State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China.
Abstract:
Aqueous zinc-sulfur batteries (AZSBs) suffer from zinc anode parasitic reactions and slow sulfur cathode kinetics. In this study, we propose a coupled spatial-electronic configuration effect strategy. By selecting additive molecules with different spatial-electronic configurations, we successfully revealed the influence of molecular spatial-electronic configuration on the electrode-electrolyte interfacial adsorption layer. The spatial-electronic configuration of benzyltrimethylammonium iodide (BTA) enables the formation of a stable adsorption layer at the anode interface, showing an effectively repulsive effect on hydrated protons and suppressing side reactions. Moreover, BTA is a dual-functional additive, and the I- ions released from BTA further catalyze sulfur redox conversion, thereby enhancing the capacity of Zn-S batteries. As a result, this functional additive electrolyte enables stable cycling for over 10000 h in Zn||Zn symmetric cells, the Zn||Cu cells exhibit an extended cycle life of over 3800 cycles with an average CE exceeding 99.44%, and Zn-S full cells deliver 422 mAh g-1 after 4000 cycles at 3 A g-1. This study demonstrates a holistic electrolyte design strategy for highly reversible AZSBs.
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