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Increasing the Durability of Polymer Electrolyte Membranes Using Organic Additives
ACS Omega ( IF 3.7 ) Pub Date : 2018-09-14 00:00:00 , DOI: 10.1021/acsomega.8b01063 Satbyul Park 1, 2 , Hyejin Lee 1 , Sung-Hee Shin 1 , Nayoung Kim 3 , Dongwon Shin 1 , Byungchan Bae 1, 2
ACS Omega ( IF 3.7 ) Pub Date : 2018-09-14 00:00:00 , DOI: 10.1021/acsomega.8b01063 Satbyul Park 1, 2 , Hyejin Lee 1 , Sung-Hee Shin 1 , Nayoung Kim 3 , Dongwon Shin 1 , Byungchan Bae 1, 2
Affiliation
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Herein, we utilize organic radical scavengers to mitigate the chemical degradation of polymer membranes without sacrificing their proton conductivity. Several hydrocarbon composite membranes based on sulfonated poly(arylene ether sulfone) (SPES50, degree of sulfonation = 50%) and containing organic radical scavengers were prepared and characterized in terms of water uptake, ion-exchange capacity, proton conductivity, and oxidative stability, being additionally exposed to hydrogen peroxide for accelerated oxidative stability testing. Precise analysis of the molecular weight and its distribution before and after the above test confirmed that the incorporation of radical scavengers enhanced the chemical durability of membranes while maintaining their proton conductivity. Finally, in an accelerated open circuit voltage durability test, composite membranes showed lifetimes exceeding 1400 h, whereas pristine SPES50 failed after 750 h. On the basis of the above, organic radical scavengers were concluded to be superior to those based on transition-metal compounds, not engaging in any interactions with the sulfonate groups of the membrane polymer and hence not compromising their proton conductivity.
中文翻译：
使用有机添加剂提高聚合物电解质膜的耐久性
在这里，我们利用有机自由基清除剂来减轻聚合物膜的化学降解，而不牺牲其质子传导性。制备了几种基于磺化聚亚芳基醚砜（SPES50，磺化度= 50%）并含有有机自由基清除剂的烃复合膜，并对其吸水率、离子交换容量、质子电导率和氧化稳定性进行了表征。另外暴露于过氧化氢以加速氧化稳定性测试。上述测试前后分子量及其分布的精确分析证实，自由基清除剂的掺入增强了膜的化学耐久性，同时保持了其质子传导性。最后，在加速开路电压耐久性测试中，复合膜的寿命超过 1400 小时，而原始 SPES50 在 750 小时后失效。基于上述，有机自由基清除剂优于基于过渡金属化合物的自由基清除剂，不与膜聚合物的磺酸基发生任何相互作用，因此不会损害其质子传导性。
更新日期：2018-09-14
中文翻译：
使用有机添加剂提高聚合物电解质膜的耐久性
在这里，我们利用有机自由基清除剂来减轻聚合物膜的化学降解，而不牺牲其质子传导性。制备了几种基于磺化聚亚芳基醚砜（SPES50，磺化度= 50%）并含有有机自由基清除剂的烃复合膜，并对其吸水率、离子交换容量、质子电导率和氧化稳定性进行了表征。另外暴露于过氧化氢以加速氧化稳定性测试。上述测试前后分子量及其分布的精确分析证实，自由基清除剂的掺入增强了膜的化学耐久性，同时保持了其质子传导性。最后，在加速开路电压耐久性测试中，复合膜的寿命超过 1400 小时，而原始 SPES50 在 750 小时后失效。基于上述，有机自由基清除剂优于基于过渡金属化合物的自由基清除剂，不与膜聚合物的磺酸基发生任何相互作用，因此不会损害其质子传导性。
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