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Sulfonated Holey Graphene Oxide (SHGO) Filled Sulfonated Poly(ether ether ketone) Membrane: The Role of Holes in the SHGO in Improving Its Performance as Proton Exchange Membrane for Direct Methanol Fuel Cells
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-05-23 00:00:00 , DOI: 10.1021/acsami.7b00198 Zhong-Jie Jiang 1 , Zhongqing Jiang 2 , Xiaoning Tian 2 , Lijuan Luo 2 , Meilin Liu 1, 3
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-05-23 00:00:00 , DOI: 10.1021/acsami.7b00198 Zhong-Jie Jiang 1 , Zhongqing Jiang 2 , Xiaoning Tian 2 , Lijuan Luo 2 , Meilin Liu 1, 3
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Sulfonated holey graphene oxides (SHGOs) have been synthesized by the etching of sulfonated graphene oxides with concentrated HNO3 under the assistance of ultrasonication. These SHGOs could be used as fillers for the sulfonated aromatic poly(ether ether ketone) (SPEEK) membrane. The obtained SHGO-incorporated SPEEK membrane has a uniform and dense structure, exhibiting higher performance as proton exchange membranes (PEMs), for instance, higher proton conductivity, lower activation energy for proton conduction, and comparable methanol permeability, as compared to Nafion 112. The sulfonated graphitic structure of the SHGOs is believed to be one of the crucial factors resulting in the higher performance of the SPEEK/SHGO membrane, since it could increase the local density of the −SO3H groups in the membrane and induce a strong interfacial interaction between SHGO and the SPEEK matrix, which improve the proton conductivity and lower the swelling ratio of the membrane, respectively. Additionally, the proton conductivity of the membrane could be further enhanced by the presence of the holes in the graphitic planes of the SHGOs, since it provides an additional channel for transport of the protons. When used, direct methanol fuel cell with the SPEEK/SHGO membrane is found to exhibit much higher performance than that with Nafion 112, suggesting potential use of the SPEEK/SHGO membrane as the PEMs.
中文翻译：
磺化有孔氧化石墨烯（SHGO）填充的磺化聚醚醚酮膜：SHGO中的孔在改善其作为直接甲醇燃料电池质子交换膜性能方面的作用
磺化有孔的石墨烯氧化物（SHGOs）是通过在超声辅助下用浓HNO 3蚀刻磺化的石墨烯氧化物而合成的。这些SHGO可用作磺化芳族聚醚醚酮（SPEEK）膜的填料。与Nafion 112相比，所获得的掺有SHGO的SPEEK膜具有均匀且致密的结构，表现出更高的质子交换膜（PEM）性能，例如，更高的质子传导率，更低的质子传导活化能以及相当的甲醇渗透性。据信，SHGOs的磺化石墨结构是导致SPEEK / SHGO膜性能更高的关键因素之一，因为它可以增加-SO 3的局部密度。膜中的H基团会引起SHGO和SPEEK基质之间的强界面相互作用，从而分别提高质子传导性和降低膜的溶胀率。另外，由于SHGO的石墨平面中存在孔，膜的质子传导性可以进一步增强，因为它提供了用于质子传输的附加通道。当使用时，发现带有SPEEK / SHGO膜的直接甲醇燃料电池表现出比具有Nafion 112更高的性能，表明SPEEK / SHGO膜可以用作PEM。
更新日期：2017-06-06
中文翻译：
磺化有孔氧化石墨烯（SHGO）填充的磺化聚醚醚酮膜：SHGO中的孔在改善其作为直接甲醇燃料电池质子交换膜性能方面的作用
磺化有孔的石墨烯氧化物（SHGOs）是通过在超声辅助下用浓HNO 3蚀刻磺化的石墨烯氧化物而合成的。这些SHGO可用作磺化芳族聚醚醚酮（SPEEK）膜的填料。与Nafion 112相比，所获得的掺有SHGO的SPEEK膜具有均匀且致密的结构，表现出更高的质子交换膜（PEM）性能，例如，更高的质子传导率，更低的质子传导活化能以及相当的甲醇渗透性。据信，SHGOs的磺化石墨结构是导致SPEEK / SHGO膜性能更高的关键因素之一，因为它可以增加-SO 3的局部密度。膜中的H基团会引起SHGO和SPEEK基质之间的强界面相互作用，从而分别提高质子传导性和降低膜的溶胀率。另外，由于SHGO的石墨平面中存在孔，膜的质子传导性可以进一步增强，因为它提供了用于质子传输的附加通道。当使用时，发现带有SPEEK / SHGO膜的直接甲醇燃料电池表现出比具有Nafion 112更高的性能，表明SPEEK / SHGO膜可以用作PEM。
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