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Full-Process Proton Management Unlocks Long-Life Aqueous Zinc-Metal Batteries.

Xianting Zhao1,2, Shengyang Huang3, Zihuan Tang4

  • 1Strait Institute of Flexible Electronics (SIFE, Future Technologies), Fujian Key Laboratory of Flexible Electronics and Strait Laboratory of Flexible Electronics (SLoFE), Fujian Normal University, Fuzhou 350117, China.

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|January 12, 2026
PubMed
Summary
This summary is machine-generated.

Chitosan oligosaccharide (COS) framework regulates proton activity in aqueous electrolytes, enhancing zinc anode stability. This strategy improves battery performance and longevity for sustainable energy storage.

Keywords:
additivesaqueous zinc batterieselectrolytesinterfacial engineeringzinc metal anodes

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Uncontrolled proton activity in aqueous electrolytes leads to side reactions, degrading zinc metal anode stability.
  • Developing stable and efficient aqueous electrolytes is crucial for next-generation energy storage devices.

Purpose of the Study:

  • To propose a full-process proton regulation strategy using chitosan oligosaccharide (COS) for stabilizing zinc metal anodes.
  • To investigate the mechanism of proton regulation by the β-1,4-glycosidic framework of COS.

Main Methods:

  • Utilizing COS with a rigid β-1,4-glycosidic framework to constrain proton generation and transport.
  • Employing COS for preferential interfacial adsorption to form a molecular barrier, inhibiting proton consumption at the zinc surface.
  • Conducting electrochemical performance tests in Zn||Zn symmetric cells, Zn||Cu cells, and Zn||MnO2 full cells.

Main Results:

  • Achieved long-term cycling stability over 8,000 hours in Zn||Zn symmetric cells.
  • Demonstrated an average Coulombic efficiency of 99.84% over 2,300 cycles in Zn||Cu cells.
  • Exhibited superior cycling stability for over 2,000 cycles at 2 A g⁻¹ in Zn||MnO2 full cells.

Conclusions:

  • The dual-function molecular architecture of COS effectively regulates proton generation, transport, and consumption.
  • Glycosidic frameworks offer a universal and transferable design principle for advanced aqueous batteries.
  • This framework-enabled regulation approach advances electrolyte design for sustainable, high-performance energy storage.