Entry number：29
SUBJECT
Supercapacitor Performance and Preparation of NiCo2Se4 nanoparticle
DEPARTMENT
Department of Computer Science and Information Engineering
PROFESSOR AND STUDENT
Professor：Hsing-I Hsiang
Student：Yi-Fen Hsiao
ABSTRACT
In this study, NCSe nanoparticles were synthesized by one-pot synthesis method. The particle size and crystalline phase of the NCSe nanoparticles can be controlled by changing the selenium addition from 1.4, 1.6, 1.8 to 2.0 mmol. The electrochemical analyzer, scanning electron microscopy and the specific surface area analyzer were used to investigate the effects of the amounts of selenium addition on the microstructure and electrochemical performance of NCSe. NCSe-1.8mmol exhibited the highest specific capacitance performance of 656 F g-1 at a large current density of 15 A g-1 in the Galvanostatic charging-discharging experiment, and the retention rate is as high as 85 %. Finally, an asymmetric supercapacitor was assembled by using NCSe-1.8mmol as the positive electrode and activated carbon material as the the negative electrode. The retention rate remained 79% after 2000 cycles of charging and discharging at a large current density of 15A g-1.
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