Title page for etd-0622113-130445


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URN etd-0622113-130445
Author Cheng Kuang Yeh
Author's Email Address No Public.
Statistics This thesis had been viewed 5572 times. Download 480 times.
Department Chemistry
Year 2012
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Effects of Grafting Density on Electrochemical Properties of Nitroxide Polymer Brush Thin-Film Electrodes
Date of Defense 2013-06-24
Page Count 109
Keyword
  • nitroxide radical
  • polymer brush
  • surface-initiated atom transfer radical polymerization
  • grafting density
  • diffusion coefficient
  • 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.
    Advisory Committee
  • Chien-Chung Han - chair
  • Mao-Sung Wu - co-chair
  • Jyh-Tsung Lee - advisor
  • Files
  • etd-0622113-130445.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2013-07-22

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