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Multifunctional iodine cathode binder design enabling high-performance zinc-iodine batteries: progress, challenges,
Weihua Xu1, Botao Zheng1, Xianshi Yang1
1School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, University Engineering Research Center of Green Chemical New Materials, Guangxi University, Nanning 530004, China. huibinghe@gxu.edu.cn.
Chemical Communications (Cambridge, England)
|July 31, 2026
Summary
Aqueous zinc-iodine batteries show promise for energy storage but face challenges like the polyiodide shuttle effect. Multifunctional binders are key to improving iodine cathode performance and enabling reliable, high-density batteries.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Aqueous zinc-iodine batteries (AZIBs) offer high capacity, safe operation, and sustainable materials for large-scale energy storage.
- Key limitations include the polyiodide shuttle effect and poor mechanical stability of iodine cathodes during cycling.
Purpose of the Study:
- To review the reaction mechanisms and limitations of iodine cathodes in AZIBs.
- To discuss the causes of shuttle effects, sluggish kinetics, and structural failure in iodine cathodes.
- To highlight recent advancements in multifunctional binder design for improved AZIB performance.
Main Methods:
- Literature review of fundamental reaction mechanisms in AZIBs.
- Analysis of iodine redox chemistry contributing to cathode limitations.
- Summarization of binder design strategies, including polar functional groups, conductive frameworks, and multiple interaction sites.
Main Results:
- The polyiodide shuttle effect and structural degradation are primary challenges for iodine cathodes.
- Multifunctional binders with specific chemical and structural features can mitigate these issues.
- Binder design is crucial for enhancing cycling stability and energy density in AZIBs.
Conclusions:
- Rational binder design is essential for overcoming the limitations of iodine cathodes in AZIBs.
- Future research should focus on optimizing binders to achieve highly reliable and high-energy-density AZIBs.
- This review provides guidance for developing advanced binders for next-generation aqueous batteries.
