A Proton Conductor Based on a Polymeric Complex of Poly(Ethylene Oxide)-Modified Poly(Methacrylate) with Anhydrous H3PO4
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- 作者：Jinli Qiao ; Nobuko Yoshimoto ; Masashi Ishikawa ; and Masayuki Morita
- 刊名：Chemistry of Materials
- 出版年：2003
- 出版时间：May 20, 2003
- 年：2003
- 卷：15
- 期：10
- 页码：2005 - 2010
- 全文大小：112K
- 年卷期：v.15,no.10(May 20, 2003)
- ISSN：1520-5002
文摘
Nonaqueous proton-conducting gel electrolyte has been prepared by incorporatinganhydrous H3PO4 in poly(ethylene oxide)-modified poly(methacrylate) (PEO-PMA) plasticized by poly(ethylene glycol) dimethyl ether (PEGDE). Optically transparent polymeric gelmembranes were obtained in a wide range of the component ratio. The sample membraneshave been characterized by AC conductivity, FTIR, and DSC measurements. High conductivity of 1.3 × 10-4 S cm-1 was obtained at room temperature for the composition of the (PEO-PMA)/PEGDE mass ratio 32:68. The ionic conductivity was enhanced by the addition ofsmall amounts of the second plasticizer, dimethylformamide (DMF). The DC polarizationexperiments of the gel membranes with Pt blocking electrodes revealed that the chargetransport in the gel was mainly ionic (tion > 0.99), where the type of the major mobile specieswas considered to be H+ cation with mobility 
= 2.5 × 10-4 cm2 V-1 s-1. The FTIRspectroscopy proved that hydrogen-bonding and protonic interactions exist between thedopant H3PO4 and the PEO-PMA matrix and/or entrapped plasticizer in the gel. In all cases,the Arrhenius plots of the conductivity showed linear relations in the temperature range of22-90 
C. The mechanism of the ion transport in the nonaqueous gel is briefly discussed.
= 2.5 × 10-4 cm2 V-1 s-1. The FTIRspectroscopy proved that hydrogen-bonding and protonic interactions exist between thedopant H3PO4 and the PEO-PMA matrix and/or entrapped plasticizer in the gel. In all cases,the Arrhenius plots of the conductivity showed linear relations in the temperature range of22-90 C. The mechanism of the ion transport in the nonaqueous gel is briefly discussed.