Electrochemical behavior of activated carbon nanofiber-vanadium pentoxide composites for double-layer capacitors

摘要

Mesopore-enriched activated carbon nanofiber (ACNF) mats are produced by incorporating vanadium(V) oxide (V_2O_5) into polyacrylonitrile (PAN) via electrospinning, and their electrochemical properties are investigated as an electrode in supercapacitors. The microstructures of the ACNFs (e.g., nanometer-size diameter, high specific surface area, narrow pore size distribution, and tunable porosity) are changed, and the textural parameters are found to affect the electrochemical properties significantly through the different V_2O_5 loadings and activation process. The V_2O_5/PAN-based ACNF electrodes with well-balanced micro/mesoporosity having an optimal pore range for effective double layer formation in an organic medium are expected to be useful electrode materials for supercapacitor applications.