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Solvent Engineering Enabled Fast Long-Range Ion Transport in Mn/Fe-Based Prussian Blue Analogues for
Na Jiang1, Ziyang Dai1, Qi Yang1
1State Key Laboratory of Chemical Resource Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China.
Advanced Materials (Deerfield Beach, Fla.)
|July 10, 2026
Summary
Solvent intercalation in Prussian blue analogues (PBAs) enhances ion transport for zinc-ion batteries (ZIBs). This method boosts capacity and stability, overcoming challenges in high-loading cathode materials.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Prussian blue analogues (PBAs) are advanced cathode materials for zinc-ion batteries (ZIBs), offering open frameworks and high operating voltages.
- A key challenge for practical ZIB applications is the structural collapse and blocked ion transport in PBAs at high material loading.
- This issue hinders long-range ion movement during repeated charge/discharge cycles.
Purpose of the Study:
- To enhance long-range ion transport in manganese/iron-based PBAs for ZIBs.
- To address the critical challenge of structural stability and ion conductivity at high material loadings.
- To improve the electrochemical performance of PBAs in ZIBs.
Main Methods:
- Utilized solvent intercalation to expand ion channels within the PBA structure.
- Regulated the coordination environment of the iron (Fe) active center.
- Investigated the suppression of lattice oscillations during electrochemical cycling.
Main Results:
- Achieved a significant capacity enhancement of 185% at a high loading mass of 9 mg cm⁻².
- Demonstrated good cycling stability at an even higher loading of 18 mg cm⁻².
- Outperformed other reported PBAs cathodes in ZIB performance.
Conclusions:
- Solvent intercalation is an effective strategy to promote ion transport and enhance performance in high-loading PBAs for ZIBs.
- This approach mitigates structural collapse and reduces ion transport barriers.
- Provides a novel pathway for developing practical, high-performance PBAs for ZIB applications.
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