质子交换膜燃料电池
质子
热稳定性
膜
复合数
电导率
材料科学
图层(电子)
燃料电池
化学工程
复合材料
热导率
化学
核物理学
工程类
物理
物理化学
生物化学
作者
Chongshan Yin,Deyuan Chen,Mengyao Hu,Huihua Jing,Libing Qian,Chunqing He
标识
DOI:10.1016/j.memsci.2024.122997
摘要
The optimal operating temperature for contemporary perfluoro-sulfonic acid (PFSA)-based proton exchange membranes (PEMs) is identified to range from 60 to 80 °C. However, operating at temperatures exceeding this threshold could offer substantial advantages. Therefore, the development of PEMs that can maintain performance at elevated temperatures is imperative. This study introduces novel SUS composite proton exchange membranes with a three-layer architecture. These membranes feature a central UIO-66-NH2/Nafion composite layer (U), bordered by sulfonated carbon-nanotubes/Nafion composite layers (S) on both sides. The SUS PEMs demonstrate improved proton conductivity, long-term stability, fuel cell efficiency, and gas barrier properties. Notably, at the elevated temperature of 145 °C, attributable to enhanced water retention capabilities, these membranes exhibit significant proton conductivity, reaching 0.428 S cm−1. For fuel cell evaluations, the SUS PEMs exhibited optimal performance (0.940 W cm−2) at the elevated temperature of 115 °C. These improvements are attributed to the dense S layer, which regulates diffusion rates of both water and gas molecules, and the U layer, which serves as a water reservoir due to its high retention capacity. These conclusions have been validated through computational simulations and further supported by positron annihilation spectroscopy.
科研通智能强力驱动
Strongly Powered by AbleSci AI