Preparation and Characterization of One-Dimensional Core–Shell Sepiolite/Polypyrrole Nanocomposites and Effect of Organic Modification on the Electrochemical Properties

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• 作者：Yan Chang ; Zhihu Liu ; Zhibing Fu ; Chaoyang Wang ; Yatang Dai ; Rufang Peng ; Xiaoping Hu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：January 8, 2014
• 年：2014
• 卷：53
• 期：1
• 页码：38-47
• 全文大小：643K
• ISSN：1520-5045

文摘

One-dimensional core鈥搒hell sepiolite/polypyrrole (SEP/PPy) nanocomposites were fabricated by in situ chemical oxidation polymerization. The coating PPy layer on organic modified sepiolite (OSEP) is more homogeneous comparing to SEP. The fabrication mechanisms have also been investigated in detail. The interactions between the radical species (N⁺) of PPy and the silanol groups (Si鈥揙H) on SEP fiber had been confirmed by Fourier transform infrared and UV鈥搗is spectroscpies. When OSEP/PPy nanocomposites were utilized as supercapacitor electrode material, the maximum specific capacitance of 164.9 F/g could be achieved. Furthermore, the rectangle-like shape of cyclic voltammetry curves revealed that the OSEP/PPy nanocomposites had electrical double-layer capacitance property. Electrochemical impedance spectroscopy indicated that OSEP/PPy nanocomposites have smaller resistance which is favor for the charge transfer.