Proton conducting polymer electrolyte based on plasticized chitosan-PEO blend and application in electrochemical devices

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• 作者：M.F. Shukur ; R. Ithnin ; H.A. Illias ; M.F.Z. Kadir
• 关键词：Chitosan&ndash ; poly(ethylene oxide) blend ; Polymer electrolyte ; Conductivity ; Fourier transform infrared spectroscopy ; Proton battery ; Electrical double layer capacitor
• 刊名：Optical Materials
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：35
• 期：10
• 页码：1834-1841
• 全文大小：1282 K

文摘

Plasticized chitosan-poly(ethylene oxide) (PEO) doped with ammonium nitrate (NH₄NO₃) electrolyte films are prepared by the solution cast technique. From Fourier transform infrared (FTIR) spectroscopy analysis, hydroxyl band of pure chitosan film is shifted from 3354 to 3425 cm^?1 when blended with PEO. On addition of 40 wt. % NH₄NO₃, new peaks at 3207 cm^?1 and 3104 cm^?1 appear in the hydroxyl band region, indicating the polymer-salt complexation. The carboxamide and amine bands are observed to shift to 1632 and 1527 cm^?1, respectively. The interaction of chitosan-PEO-NH₄NO₃-EC can be observed by the appearance of the doublet CO stretching band of EC. The sample with 70 wt. % ethylene carbonate (EC) exhibits the highest room temperature conductivity of (2.06 ¡À 0.39) ¡Á 10^?3 S cm^?1. This result is further verified by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) studies. Proton battery is fabricated and shows an open circuit potential (OCP) of (1.66 ¡À 0.02) V and average discharge capacity at (48.0 ¡À 5.0) mA h. The maximum power density of the fabricated cell is (9.73 ¡À 0.75) mW cm^?2. The polymer electrolyte is also employed as separator in electrical double layer capacitor (EDLC) and is cycled for 140 times at room temperature.