Construction of Co-Mn Prussian blue analog hollow spheres for efficient aqueous Zn-ion batteries

• Main Authors: Zeng, Yinxiang, Lu, Xue Feng, Zhang, Song Lin, Luan, Deyan, Li, Sheng, Lou, Xiong Wen David
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2022
• Subjects: Engineering::Chemical engineering; Hollow Spheres; Zn-ion Batteries
• Online Access: https://hdl.handle.net/10356/163144
• Institution: Nanyang Technological University

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.