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Electrolyte and Electrode Design for Aqueous Potassium-Ion Batteries.
Xiaogang Niu1, Linlin Wang2, Yifan Chen2
1State Key Laboratory of Bioinspired Interfacial Materials Science, Bioinspired Science Innovation Center, Hangzhou International Innovation Institute, Beihang University, Hangzhou, P. R. China.
Chemsuschem
|April 21, 2026
Summary
Aqueous potassium-ion batteries offer safe, abundant energy storage. Electrolyte engineering and advanced materials are key to overcoming stability challenges for high-performance batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Aqueous potassium-ion batteries (AKIBs) are promising due to safety and potassium abundance.
- Challenges include limited electrochemical stability and material availability, hindering energy density and cycle life.
Purpose of the Study:
- To review recent advancements in electrolytes, cathode materials, and anode materials for AKIBs.
- To highlight challenges and future directions for developing high-performance AKIBs.
Main Methods:
- Systematic review of recent literature on AKIBs.
- Focus on electrolyte engineering, cathode/anode material development, and interfacial chemistry.
Main Results:
- Electrolyte engineering effectively suppresses water activity and expands voltage windows.
- Progress in Prussian blue analogs, transition-metal oxides, and polyanionic compounds for cathodes.
- Advancements in anode interfacial regulation, kinetic compatibility, and mechanical stability.
Conclusions:
- Interfacial chemistry is crucial for the reversibility and durability of AKIBs.
- Further research is needed for high-energy-density, durable, and practical AKIBs.
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