Development of a cross-linked quaternized poly(styrene-b-isobutylene-b-styrene)/graphene oxide composite anion exchange membrane for direct alkaline methanol fuel cell application
Development of a cross-linked quaternized poly(styrene-b-isobutylene-b-styrene)/graphene oxide composite anion exchange membrane for direct alkaline methanol fuel cell application
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DOI：
10.1039/c6ra08037e
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Wu, Yi-Xian
中科院分区：
文献类型：
--
作者：
Dai, Pei;Mo, Zhao-Hua;Wu, Yi-Xian
采用有机改性氧化石墨烯（果阿）插层法制备了交联季铵化聚（苯乙烯-b-异丁烯-b-苯乙烯）/氧化石墨烯复合阴离子交换膜，并将其应用于直接碱性甲醇燃料电池。为了进一步提高复合膜的离子电导率，将季铵化果阿（GOAN）引入到QSIBS中。与Nafion（R）膜相比，新的阴离子交换膜显示出相当的离子传导率（1.95 x 10（-2）S cm（-1）），但甲醇渗透率低得多（1.7 x 10（-7）cm（2）s（-1））。QSIBS/0047 OAN-0.50wt%复合膜具有最高的选择性，比Nafion 115膜高约12倍。有希望的性能归因于两个因素：一个是季铵化十八胺官能化的氧化石墨烯片的阻挡效应，这不利于甲醇渗透;另一个是在并入的改性氧化石墨烯和聚合物之间存在互连的离子传输通道，这有利于离子传输。
A cross-linked quaternized poly(styrene-b-isobutylene-b-styrene)/graphene oxide composite anion exchange membrane has been prepared via intercalation of organo-modified graphene oxide (GOA), and characterized as a promising anion exchange membrane for direct alkaline methanol fuel cell application. In order to further increase the ionic conductivity of the composite membrane, quaternized GOA (GOAN) was introduced into QSIBS. Compared with the Nafion (R) membrane, the new anion exchange membranes show a comparable ionic conductivity (1.95 x 10(-2) S cm(-1)) but much lower methanol permeability (1.7 x 10(-7) cm(2) s(-1)). The QSIBS/0047OAN-0.50 wt% composite membrane has the highest selectivity, which is about 12 times higher than that of the Nafion 115 membrane. The promising performance is attributed to two factors: one is the barrier effect of the quaternized octadecylamine-functionalized graphene oxide sheets, which is unfavourable for methanol crossover; and the other is the presence of interconnected ionic transportation channels between the incorporated modified graphene oxide and polymer, which is favourable for ionic transport.