Enhanced Conductivity of Anion-Exchange Membrane by Incorporation of Quaternized Cellulose Nanocrystal
Enhanced Conductivity of Anion-Exchange Membrane by Incorporation of Quaternized Cellulose Nanocrystal
复制标题
通过加入季铵化纤维素纳米晶体增强阴离子交换膜的电导率
DOI：
10.1021/acsami.8b05298
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发表时间：
2018-07-18
影响因子：
9.5
通讯作者：
Wei, Zidong
中科院分区：
文献类型：
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作者：
Cheng, Xia;Wang, Jianchuan;Wei, Zidong
高电导率的阴离子交换膜是碱性阴离子交换膜燃料电池运行的基础。在这项工作中，我们首次展示了一种提高阴离子交换膜(AEM)导电性的有效策略，即通过引入季节化纤维素纳米晶(QCNC)。形貌观察表明，QCnC在QPPO基质中分布均匀，QCnc网络清晰，使复合膜的氢氧化物电导率显著提高，如2wt%QCnC/QPPO复合膜的电导率为QPPO的160%(60ms cm(-1)，@80℃)。此外，基于2wt%QCnc/QPPO AEM的膜电极组件的H-2/O-2电池性能表现出优异的峰值功率密度，在60℃没有背压的情况下，峰值功率密度为392 mV cm(-2)，而整齐的QPPO AEM的峰值功率密度仅为270 mV cm(-2)。
High ion conductivity of anion-exchange membrane is essential for the operation of alkaline anion-exchange membrane fuel cell. In this work, we demonstrated an effective strategy to enhance the conductivity of anion-exchange membrane (AEM), by incorporation of quaternized cellulose nanocrystal (QCNC) for the first time. Morphology observation demonstrated a uniform distribution of QCNC within QPPO matrix, as well as a clear QCNC network, which led to significant enhancement in hydroxide conductivities of composite membranes, for example, 2 wt % QCNC/QPPO membrane possessed a conductivity of 160% (60 mS cm(-1), @80 degrees C) of that of QPPO. Furthermore, H-2/O-2 cell performance of membrane electrode assembly based on 2 wt % QCNC/QPPO AEM showed an excellent peak power density of 392 mV cm(-2) at 60 degrees C without back pressure, whereas that of neat QPPO AEM was only 270 mV cm(-2).