Capacitive versus diffusion controlled mechanism in a mesoporous cobalt hexacyanoferrate/carbon composite for a high-performance capacitive deionization device: electrochemical quartz crystal microbalance (EQCM) studies

Key Points

• The aim is to analyze the mechanisms influencing salt adsorption capacity in a capacitive deionization device using cobalt hexacyanoferrate and mesoporous carbon.
• Used electrochemical quartz crystal microbalance (EQCM) to study ion diffusion and adsorption mechanisms.
• Assessed different electrolytes to evaluate energy consumption and desalination pathways.
• Demonstrated higher salt adsorption capacity in the HCDI device with cobalt hexacyanoferrate.
• Showed lower energy consumption across different electrolyte conditions.