膜
电导率
离子电导率
哌啶
离子
离子键合
化学
Nafion公司
离子交换
材料科学
高分子化学
化学工程
有机化学
电化学
物理化学
电极
工程类
生物化学
电解质
作者
Yiman Gu,Tianming Dong,Yanchao Zhang,Zhanyu Li,Yan Wang,Jian Gao,Yijia Lei,Jingyi Wu,Yuchao Wang,Zhe Wang
标识
DOI:10.1016/j.jpowsour.2023.233918
摘要
The anion exchange membranes (AEMs) have the important function of blocking fuel and conducting OH− to make the cell form a circuit, so its alkali stability directly affects the performance of alkaline fuel cells. Currently, AEMs face a "trade-off" between ionic conductivity and stability. In order to solve this problem, we optimize the alkali resistance and conductivity of AEMs by introducing dipole-interacting side chains and hydrophilic hydroxyl side chains acting simultaneously on a rigid polymer backbone. By adopting the design strategy of "1 + 1>2″, the ion channel efficiency also makes a high-speed leap from a "two-wheeled bicycle" to a "four-wheeled car". This effective microscopic modulation is clearly demonstrated by transmission electron microscope (TEM), where the AEMs after molecular design carry out a more obvious microphase separation structure at 200 nm. Through the PBP-54-IS- [OPD-100-OH-0] membrane, the maximum ionic conductivity is 100.62 mS cm−1 at 80 °C. After 1000 h at 80 °C, the retention rate of OH− conductivity of all AEMs was over 88.24 %. We also test its fuel cell performance for analysis. When the temperature of the two poles is 75 °C/72 °C, the power density is 147.28 mW cm−2. These are in line with the inherent requirements of AEMs for fuel cell applications.
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