芳烯
膜
高分子化学
质子交换膜燃料电池
乙醚
材料科学
聚合物
傅里叶变换红外光谱
电导率
离子交换
砜
缩聚物
化学工程
化学
物理化学
有机化学
离子
芳基
复合材料
烷基
工程类
生物化学
作者
Prem Prakash Sharma,Dukjoon Kim,Dong Jin Kim
出处
期刊:Polymers
[MDPI AG]
日期:2021-03-31
卷期号:13 (7): 1111-1111
被引量:11
标识
DOI:10.3390/polym13071111
摘要
A successful approach towards enhancement in ion cluster size of sulfonated poly (arylene ether sulfone) (SPAES)-based membranes has been successfully carried out by encapsulating basic pendent branches as side groups. Modified SPAES was synthesized by condensation polymerization followed by bromination with N-bromosuccinamide (NBS) and sulfonation by ring opening reaction. Various molar ratios of branched polyethyleneimine (PEI) were added to the SPAES and the developed polymer was designated as SPAES-x-PEI-y, where x denoted the number of sulfonating acid group per polymer chain and y represents the amount of PEI concentration. Polymer synthesis was characterized by 1H-NMR (Nuclear magnetic resonance) and FT-IR (Fourier-transform infrared spectroscopy) analysis. A cumulative trend involving enhanced proton conductivity of the membranes with an increase in the molar ratio of PEI has been observed, clearly demonstrating the formation of ionic clusters. SPAES-140-PEI-3 membranes show improved proton conductivity of 0.12 Scm−1 at 80 °C. Excellent chemical stability was demonstrated by the polymer with Fenton’s test at 80 °C for 24 h without significant loss in proton conductivity, owing to the suitability of the synthesized hybrid membrane for electrochemical application. Moreover, a single cell degradation test was conducted at 80 °C showing a power density at a 140 mWcm−2 value, proving the stable nature of synthesized membranes for proton exchange membrane fuel cell application.
科研通智能强力驱动
Strongly Powered by AbleSci AI