Tuning Co-Ni Electrochemical Active Sites via Iron Incorporation in Carbonate Hydroxide Frameworks for High-Performance Supercapacitors

Key Points

• The aim is to investigate the effects of iron doping in CoNi carbonate frameworks on their electrochemical performance.
• Fe-doped CoNi carbonate frameworks were synthesized and characterized for their electrochemical properties.
• Charge storage and ion transport behaviors were assessed through various electrochemical tests.
• Iron incorporation significantly increased charge storage capacity, showing an improvement of 30% compared to non-doped frameworks.
• The enhanced ion transport behavior was indicated by lower resistance values in the impedance analyses.