| URN |
etd-0622113-130445 |
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| Author |
Cheng Kuang Yeh |
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| Author's Email Address |
No Public. |
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| Statistics |
This thesis had been viewed 5572 times. Download 480 times. |
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| Department |
Chemistry |
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| Year |
2012 |
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| Semester |
2 |
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| Degree |
Master |
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| Type of Document |
|
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| Language |
zh-TW.Big5 Chinese |
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| Title |
Effects of Grafting Density on Electrochemical Properties of Nitroxide Polymer Brush Thin-Film Electrodes |
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| Date of Defense |
2013-06-24 |
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| Page Count |
109 |
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| Keyword |
nitroxide radical
polymer brush
surface-initiated atom transfer radical polymerization
grafting density
diffusion coefficient
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| Abstract |
Nitroxide polymer brushes thin-film electrodes were fabricated by a non-crosslinking approach via surface-initiated atom transfer radical polymerization. The polymer brushes were fixed on the substrate with covalent bonding, which prevents the polymer from dissolving into the electrolyte. Different grafting densities of the polymer brushes were prepared and characterized by water contact angle, atomic force microscope (AFM), and electrochemical properties, including cyclic voltammetry (CV), AC-impedance analysis (AC) and chronoamperometry (CA). Electrochemical mechanism was then discussed. The results show that by reducing the grafting density of polymer brushes, the mobility of the polymer chain as well as the ion channels were enhanced. Therefore the ionic diffusion rate increases. Polymer brushes of the 1% grafting density has the most rapid electron transfer and the highest diffusion coefficient, which makes better battery performance. |
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| Advisory Committee |
Chien-Chung Han - chair
Mao-Sung Wu - co-chair
Jyh-Tsung Lee - advisor
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| Files |
Indicate in-campus at 5 year and off-campus access at 5 year. |
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| Date of Submission |
2013-07-22 |
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