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Abstract <p>A sorbitol-modified electrolyte (3&#xa0;wt%) is employed to regulate Zn<sup>2+</sup> transport and interfacial reactions in Zn || MnO<sub>2</sub> pouch cells. The additive enables stable Zn plating/stripping with low polarization and rapid activation, sustaining over 350&#xa0;h at high current densities without short-circuiting. The pouch cell delivers ~140–170&#xa0;mAh&#xa0;g<sup>−1</sup> at 1C, with an initial capacity of ~250&#xa0;mAh&#xa0;g<sup>−1</sup> at 0.3C, maintains a stable Coulombic efficiency of ~95%, and operates stably for up to 400 cycles at 1.6C. Kinetic analysis reveals reduced charge-transfer resistance and enhanced ion diffusion, resulting in uniform Zn deposition and suppressed dendrite growth. This simple electrolyte engineering strategy provides a practical route for the fabrication of durable, high-performance aqueous Zn-ion pouch batteries.</p> Graphical abstract <p></p>

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Sorbitol-regulated Zn deposition for suppressed dendrite formation and enhanced cycling stability in Zn || MnO2 pouch cells

  • 期刊论文

  • 发表日期：

    2026年7月29日

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  • Bien Quang Nguyen,
  • Huong Thu Duong,
  • Minh Quang Tran,
  • Khanh Van Tran,
  • Duc Dung Mai,
  • Duy Tho Pham,
  • Hien Xuan Vu

摘要

Abstract

A sorbitol-modified electrolyte (3 wt%) is employed to regulate Zn2+ transport and interfacial reactions in Zn || MnO2 pouch cells. The additive enables stable Zn plating/stripping with low polarization and rapid activation, sustaining over 350 h at high current densities without short-circuiting. The pouch cell delivers ~140–170 mAh g−1 at 1C, with an initial capacity of ~250 mAh g−1 at 0.3C, maintains a stable Coulombic efficiency of ~95%, and operates stably for up to 400 cycles at 1.6C. Kinetic analysis reveals reduced charge-transfer resistance and enhanced ion diffusion, resulting in uniform Zn deposition and suppressed dendrite growth. This simple electrolyte engineering strategy provides a practical route for the fabrication of durable, high-performance aqueous Zn-ion pouch batteries.

Graphical abstract