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Zinc-Sponge Battery Electrodes that Suppress Dendrites
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Functional Electrolyte Additives for Aqueous Zinc-Ion Batteries: Progress and Perspectives.

Danyang Wang1, Ying Tang1, Hui Peng1

  • 1Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, College of Engineering, Northwest Normal University, Lanzhou, 730070, China.

Chemsuschem
|August 14, 2025
PubMed
Summary

Electrolyte additives are crucial for improving aqueous zinc-ion batteries (AZIBs) by preventing zinc dendrites and side reactions. This review categorizes additives and explains their mechanisms to guide the development of safer, high-performance AZIBs.

Keywords:
Zn dendriteaqueous zinc‐ion batterieselectrolyte additivesolvated sheath structure

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Aqueous zinc-ion batteries (AZIBs) offer safe and sustainable energy storage.
  • Key challenges include zinc dendrite formation, hydrogen evolution, and parasitic reactions, hindering practical application.

Purpose of the Study:

  • To systematically review the role of electrolyte additives in overcoming AZIB limitations.
  • To categorize additives based on their functions and elucidate their mechanisms of action.

Main Methods:

  • Literature review and systematic categorization of electrolyte additives for AZIBs.
  • Analysis of additive mechanisms, including solvation sheath modification, interphase formation, and reaction suppression.

Main Results:

  • Additives are classified into dendrite-inhibiting, interface-stabilizing, ion-transport-optimizing, bioinspired, and multifunctional types.
  • Mechanisms involve altering Zn2+ solvation, creating protective layers, and suppressing unwanted reactions like HER.
  • Additives enhance Zn deposition uniformity and interfacial stability.

Conclusions:

  • Electrolyte additives are vital for advancing AZIB performance and safety.
  • Further research should focus on cost-effective, stable additives and interdisciplinary strategies for commercialization.