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<p>The development of aqueous zinc-ion batteries (AZIBs) is significantly hampered by dendrite growth and parasitic side reactions on the zinc anode. To address these challenges simultaneously, we propose sodium 2,3-dimercapto-1-propanesulfonate (DMPS) as a novel electrolyte additive. The sulfhydryl (–SH) groups in DMPS react with zinc to form robust Zn–S bonds, constructing a high-strength inorganic framework within the solid electrolyte interphase (SEI). Concurrently, the sulfonate (–SO<sub>3</sub><sup>−</sup>) groups enhance interfacial wettability, optimize ion transport, and reduce impedance. These dual functions synergistically create a stable, highly ion-conductive organic–inorganic hybrid protective layer on the zinc surface. This interphase effectively guides uniform zinc deposition and suppresses water-induced corrosion. Consequently, Zn//Cu cells demonstrate an average coulombic efficiency of 99.37% over 2500 cycles. Furthermore, Zn//Zn symmetric cells achieve an extended cycling lifespan exceeding 3200&#xa0;h at 1&#xa0;mA&#xa0;cm<sup>−2</sup>.</p>

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Bifunctional Organic–Inorganic Hybrid Interphase for Long-Term Cycling Stability of Zinc Anodes

  • 期刊论文

  • 发表日期：

    2026年3月4日

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  • Xinyu Zhang,
  • Yanduo Xia,
  • Yuhui Lu,
  • Haixia Liu,
  • Da Lou

摘要

The development of aqueous zinc-ion batteries (AZIBs) is significantly hampered by dendrite growth and parasitic side reactions on the zinc anode. To address these challenges simultaneously, we propose sodium 2,3-dimercapto-1-propanesulfonate (DMPS) as a novel electrolyte additive. The sulfhydryl (–SH) groups in DMPS react with zinc to form robust Zn–S bonds, constructing a high-strength inorganic framework within the solid electrolyte interphase (SEI). Concurrently, the sulfonate (–SO3−) groups enhance interfacial wettability, optimize ion transport, and reduce impedance. These dual functions synergistically create a stable, highly ion-conductive organic–inorganic hybrid protective layer on the zinc surface. This interphase effectively guides uniform zinc deposition and suppresses water-induced corrosion. Consequently, Zn//Cu cells demonstrate an average coulombic efficiency of 99.37% over 2500 cycles. Furthermore, Zn//Zn symmetric cells achieve an extended cycling lifespan exceeding 3200 h at 1 mA cm−2.