Title page for etd-0724113-013026


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URN etd-0724113-013026
Author Jian-Zhen Huang
Author's Email Address No Public.
Statistics This thesis had been viewed 5337 times. Download 131 times.
Department Electrical Engineering
Year 2012
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Study of supercapacitor using composite electrodes with NiO coated mesocarbon microbeads
Date of Defense 2013-07-09
Page Count 102
Keyword
  • Energy density
  • Composite electrodes
  • Mesocarbon microbeads
  • Supercapacitor
  • Nickel oxide
  • Abstract In this study, the composite electrode of supercapacitor was fabricated with composite active carbon. The composite active carbon of NiO coated mesocarbon microbeads was prepared by filtering the composite solution and heat treatment. For finding the optimal processing parameters of composite electrodes, the temperature of heat treatment, the amount of carbon black and binder, and various molarity of NiO solution on the capacitative properties of supercapacitor are investigated. The cyclic voltammograms (CV) characteristics of capacitance are studied with a scan rate of 25 mV/s. The charge-discharge efficiency and life time of the composite electrode are also discussed.
    Experimental results reveal that the optimum composite active carbon was obtained with the molarity of 0.75 M NiO and temperature of heat treatment of 250℃ and adding 25 wt.% carbon black and 2 wt.% binder. The specific capacitance of composite electrodes in 1 M LiClO4 are 228 F/g . Besides, the XRD and SEM results showed the intensities of crystalline peaks of NiO increased as the temperature increased and the crystal structure of NiO coated mesocarbon microbeads became obvious as the temperature increased. The energy density and power density of composite electrodes are 285 Wh/kg and 69.8 kW/kg. It reveals the promotion of the capacitative properties of supercapacitor at higher energy density and power density. Finally, in the test of charge-discharge efficiency and life time, the charge-discharge efficiency is near 100% after 5000 cycles and it still retains good adhesion between electrode material and substrate.
    Advisory Committee
  • Meng-Chyi Wu - chair
  • Shou-Ching Chang - co-chair
  • Chih-Ming Wang - co-chair
  • Yeong-Her Wang - co-chair
  • Ying-Chung Chen - advisor
  • Files
  • etd-0724113-013026.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2013-08-24

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