期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 48, 期 96, 页码 37784-37795出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.11.146
关键词
Direct methanol fuel cell; Methanol crossover; Proton conductivity; Oxidative stability; Poly (ether ether ketone)
Sol-gel modified sulfonated poly(ether ether ketone) (SPEEK) organosilane-based composite proton exchange membranes were investigated for their suitability in direct methanol fuel cells (DMFCs). The addition of aminopropyl trimethoxysilane (APTES) in different concentrations improved the physico and electrochemical performances of the composite membranes by inducing H-bonding interactions between free -NH2 and -SO3H groups. The Si-SPEEK membrane showed potential as an alternate for DMFCs.
Herein, we report sol-gel modified sulfonated poly(ether ether ketone) (SPEEK) organosilane based composite proton exchange membranes for their suitability in direct methanol fuel cells (DMFCs). Different concentrations (0.2-1.5 wt%) of aminopropyl trimethoxysilane (APTES) are incorporated in SPEEK matrix by in-situ sol-gel method. Physico and electrochemical performances of composite membranes are enhanced by induced Hbonding interactions between free -NH2 and -SO3H groups. With increase in APTES concentration to 0.8 wt%, the ionic conductivity illustrates improvement by similar to 80% while IEC and Proton conductivity (Pc) enhances by similar to 21% and similar to 70%, respectively than SPEEK. To further explore the feasibility of the membranes in DMFC. Methanol crossover resistance is calculated to as low as 5.30 x 10(-7) cm(2) s(-1) and offers highest selectivity of 4.43 S s cm(-3) in contrast to 12.55 x 10(-7) cm(2) s(-1) and 0.31 S s cm(-3) for SPEEK, respectively. This study reveals that the Si-SPEEK membrane is a potential alternate for DMFC. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据