Hierarchical Ordered Porous Carbons with Macro/Mesopores and Micropores as High Performance Electrodes in Capacitive Deionization
Date Issued
2015
Date
2015
Author(s)
Huang, Shu-Yun
Abstract
Three-dimensional hierarchical porous carbon spheres (3D-HPCS) are rationally designed as electrode materials for capacitive deionization (CDI). The 3D-HPCS was observed with a hierarchal pores structure by SEM and TEM. As compared to Graphite, AC, and order mesoporous carbon (OMC) electrodes, 3D 3D-HPCS spheres have well pore properties with a specific surface of 644 m2/g and total pore volume of 0.86 cm3/g. In this work, the electrosorption behaviors of 3D-HPC electrode were investigated by the electrochemical experiments, including CV, EIS, GC, at different sodium chloride (NaCl) concentrations. From the experimental results, 3D-HPCS electrode has ideal electrical double layer capacitance and low inner resistance of ion transportation from bulk solution onto the electrode. Furthermore, the electrosorption capacity of 3D-HPCS electrode was 33.86 mg/g at 1.2 V in 10 mM NaCl solution. As evidenced, in comparison with other nanoporous carbon electrodes, the 3D-HPCS electrodes has the highest electrosorption capacity, indicating excellent desalting capability for CDI process. Consequently, the prepared 3D-HPCS electrodes has been demonstrated as a desirable electrode materials for CDI. The results can provide useful information to develop CDI electrode materials.
Subjects
three-dimensional hierarchical structure
capacitive deionization
electrical double layer capacitance
carbon electrode
SDGs
Type
thesis
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ntu-104-R02541202-1.pdf
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