Processes, Vol. 13, Pages 1766: Development of High-Performance Supercapacitor Electrodes Based on CeO2/SiO2/CMK-3 Composites

Processes doi: 10.3390/pr13061766

Authors:
Chelliah Koventhan
An-Ya Lo
Chia-Chia Chang
Ming-Liao Tsai

A novel composite material consisting of cerium dioxide (CeO2), silica (SiO2), and mesoporous carbon (CMK-3) was developed for supercapacitor electrodes. The composite’s synthesis involved a high-surface-area porous carbon combined with CeO2 and SiO2. The resulting material was characterized by a high specific capacitance due to its mesoporous structure and enhanced dispersion CeO2 and SiO2. The effects of different types of CeO2 and SiO2 are also discussed. Both CeO2 and SiO2 components offer advantages such as abundance, low costs, and excellent catalytic properties. The composite’s structure improves CeO2 nanofiber (CeO2 NF) dispersion and reduces impedance through rapid redox reactions. The influence of the CeO2/SiO2/CMK-3 ratio on specific capacitance was investigated. The optimized composite electrode demonstrated a significantly improved specific capacitance, 2.6 times higher than that of the pristine mesoporous carbon electrode. This work highlights the potential of CeO2/SiO2/CMK-3 composites for energy storage applications and underscores the importance of optimizing component ratios and morphology for improved supercapacitor performance.

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Chelliah Koventhan www.mdpi.com