Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 41, Pages 22189-22194Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202107697
Keywords
Co substitution; hollow spheres; ion exchange; Prussian blue analogs; Zn-ion batteries
Categories
Funding
- Ministry of Education of Singapore [MOE2017-T2-2-003, MOE2019-T2-2-049]
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A template-engaged ion exchange approach was developed for synthesizing Co-substituted Mn-rich PBA hollow spheres, which showed efficient zinc ion storage properties with high capacity, decent rate capability, and prolonged cycle life.
Prussian blue analogs (PBAs) are considered as reliable and promising cathode materials for aqueous Zn-ion batteries (AZIBs), but they suffer from low capacity and poor cycling stability due to insufficient active sites and structural damage caused by the ion insertion/extraction processes. Herein, a template-engaged ion exchange approach has been developed for the synthesis of Co-substituted Mn-rich PBA hollow spheres (CoMn-PBA HSs) as cathode materials for AZIBs. Benefiting from the multiple advantageous features including hollow structure, abundant active sites, fast Zn2+ ion diffusion, and partial Co substitution, the CoMn-PBA HSs electrode shows efficient zinc ion storage properties in terms of high capacity, decent rate capability and prolonged cycle life.
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