Characteristics of the electric double layer capacitances by using IrO2-coated on carbon nanotubes grown on carbon fibers
碩士 === 國立臺灣科技大學 === 電子工程系 === 99 === Electrochemical capacitors become more important because of rapid development of the electronic product and the increasing of the energy demand. In this study, we probed the electrochemical characteristics for carbon fibers, (carbon nanotubes, CNTs)/carbon fibers...
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ndltd-TW-099NTUS54280312019-05-15T20:42:05Z http://ndltd.ncl.edu.tw/handle/9rs3g7 Characteristics of the electric double layer capacitances by using IrO2-coated on carbon nanotubes grown on carbon fibers 成長二氧化銥於碳纖維基板上應用於電雙層電容電極之研究 Jhen-Hong Cai 蔡鎮鴻 碩士 國立臺灣科技大學 電子工程系 99 Electrochemical capacitors become more important because of rapid development of the electronic product and the increasing of the energy demand. In this study, we probed the electrochemical characteristics for carbon fibers, (carbon nanotubes, CNTs)/carbon fibers, IrO2/carbon fibers, and IrO2/CNTs/carbon fibers. Due to the advantages of carbon fibers such as flexure, curled surface, good electric properties, and easy-contact with carbon, carbon fibers were used as the substrate. CNTs and IrO2 presented high conductivity, chemical stability, and large surface area which increase the interactive area with electrolyte to enhance the capacitance of electrochemical capacitor. The supporting electrolyte was KOH solution. The measurements of electrochemical capacitor were 2-electrode system and 3-electrode system. The specific capacitance values of carbon fiber, CNTs/carbon fibers, IrO2/carbon fibers and IrO2/CNTs/carbon fibers electrodes were 7.00×10-3, 6.94, 34.54, 32.85 Fg-1 in 2-electrode system, and 1.01×10-2, 35.71, 123.46, 153.05 Fg-1 in 3-electrode system, respectively. The electrochemical measurements showed that the IrO2/carbon fibers and IrO2/CNTs/carbon fibers had good performances of electrochemical capacitors. We measured the electrodes by charge-discharge 100 cycles and found that they maintained electrochemical characteristics. The results indicate that the IrO2/carbon fibers and IrO2/CNTs/carbon fibers are excellent electrochemical electrodes. Kuei-Yi Lee 李奎毅 2011 學位論文 ; thesis 53 zh-TW |
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碩士 === 國立臺灣科技大學 === 電子工程系 === 99 === Electrochemical capacitors become more important because of rapid development of the electronic product and the increasing of the energy demand. In this study, we probed the electrochemical characteristics for carbon fibers, (carbon nanotubes, CNTs)/carbon fibers, IrO2/carbon fibers, and IrO2/CNTs/carbon fibers. Due to the advantages of carbon fibers such as flexure, curled surface, good electric properties, and easy-contact with carbon, carbon fibers were used as the substrate. CNTs and IrO2 presented high conductivity, chemical stability, and large surface area which increase the interactive area with electrolyte to enhance the capacitance of electrochemical capacitor. The supporting electrolyte was KOH solution. The measurements of electrochemical capacitor were 2-electrode system and
3-electrode system. The specific capacitance values of carbon fiber, CNTs/carbon fibers, IrO2/carbon fibers and IrO2/CNTs/carbon fibers electrodes were 7.00×10-3, 6.94, 34.54, 32.85 Fg-1 in 2-electrode system, and 1.01×10-2, 35.71, 123.46, 153.05 Fg-1 in 3-electrode system, respectively. The electrochemical measurements showed that the IrO2/carbon fibers and IrO2/CNTs/carbon fibers had good performances of electrochemical capacitors. We measured the electrodes by charge-discharge 100 cycles and found that they maintained electrochemical characteristics. The results indicate that the IrO2/carbon fibers and IrO2/CNTs/carbon fibers are excellent electrochemical electrodes.
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author2 |
Kuei-Yi Lee |
author_facet |
Kuei-Yi Lee Jhen-Hong Cai 蔡鎮鴻 |
author |
Jhen-Hong Cai 蔡鎮鴻 |
spellingShingle |
Jhen-Hong Cai 蔡鎮鴻 Characteristics of the electric double layer capacitances by using IrO2-coated on carbon nanotubes grown on carbon fibers |
author_sort |
Jhen-Hong Cai |
title |
Characteristics of the electric double layer capacitances by using IrO2-coated on carbon nanotubes grown on carbon fibers |
title_short |
Characteristics of the electric double layer capacitances by using IrO2-coated on carbon nanotubes grown on carbon fibers |
title_full |
Characteristics of the electric double layer capacitances by using IrO2-coated on carbon nanotubes grown on carbon fibers |
title_fullStr |
Characteristics of the electric double layer capacitances by using IrO2-coated on carbon nanotubes grown on carbon fibers |
title_full_unstemmed |
Characteristics of the electric double layer capacitances by using IrO2-coated on carbon nanotubes grown on carbon fibers |
title_sort |
characteristics of the electric double layer capacitances by using iro2-coated on carbon nanotubes grown on carbon fibers |
publishDate |
2011 |
url |
http://ndltd.ncl.edu.tw/handle/9rs3g7 |
work_keys_str_mv |
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1719102100137312256 |