Nafion公司
电导率
质子交换膜燃料电池
膜
化学工程
离聚物
限制电流
相对湿度
材料科学
植酸
化学
电化学
聚合物
复合材料
电极
生物化学
物理化学
热力学
物理
工程类
共聚物
作者
Mohamed R. Berber,Inas H. Hafez
标识
DOI:10.1016/j.ijhydene.2024.01.079
摘要
Nafion as a conducting polymer faces conduction challenges at high operating temperatures and low humidity levels, leading to an undesired fuel cell performance. Here, we offer a step forward towards the use of Nafion as a high-temperature/low-humidity membrane in fuel cells through the incorporation of phytic acid (IP6) by a doping process. The synergetic effect of IP6 on the physicochemical properties, mechanical characteristics, oxidative durability, proton conductivity, and fuel cell performance of Nafion membrane is studied. Compared to the pristine Nafion, the Nafion-IP6 membrane has shown a 3-fold increase in Young's modulus, a 83%-increase in water uptake, and around 6-fold increase in proton conductivity at 100 °C under 25% RH. The Ea has reached 8.3 kJ/mol, indicating a vehicular/Grotthuss proton conduction mechanism. The Nafion-IP6 based MEA has shown a 71%-increase in the output power density and a 54%-increase in the limiting current density compared to the pristine Nafion-based MEA.
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