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Graphene inclusion effect on anion-exchange membranes properties for alkaline water electrolyzers
International Journal of Hydrogen Energy ( IF 7.2 ) Pub Date : 2020-05-15 , DOI: 10.1016/j.ijhydene.2020.04.195
Daniela Ion-Ebrasu , Bruno G. Pollet , Simona Caprarescu , Alin Chitu , Roxana Trusca , Violeta Niculescu , Raluca Gabor , Elena Carcadea , Mihai Varlam , Bogdan Stefan Vasile

The main issues facing the development of Anion Exchange Membranes (AEM) are the low hydroxide ion (OH) conductivity compared to protons (H+), and the thermal and chemical stability. Based on the its unique two-dimensional structure, graphene is estimated to be one of the best solutions for the hydrogen ions (H+ and OH) selectivity and conductivity improvement. This work presents the graphene-composite membranes (AEMGrs) preparation and characterization in comparison with commercial FAA3-20® and FAA3-30® membranes from Fumatech. Various amounts of commercial graphene were incorporated into the Fumion® FAA-3 in NMP (10%), solutions which were then used to fabricate new AEMs by the Doctor-Blade (DB) method. Commercial and graphene-composite AEMs were studied by infrared spectroscopy with Fourier Transformation (FTIR), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), scanning electron microscopy (SEM), dynamic mechanical analysis (DMA), water uptake (WU), ion exchange capacity (IEC), and in plane four-points electrochemical impedance spectroscopy (4p-EIS). The results indicated that the composite membranes containing 50 mg of graphene exhibited an improved IEC (3.16 mmol g−1) and OH conductivity (113.27 mS cm−1) at 80 °C measured in 0.01 M KOH (pH = 12).



中文翻译:

石墨烯夹杂物对碱性水电解槽阴离子交换膜性能的影响

面向阴离子交换膜(AEM)的发展的主要问题是低氢氧根离子(OH - )电导率相比质子(H +),以及热和化学稳定性。基于该其独特的二维结构,石墨烯被估计为用于氢离子(H最好的解决方案之一+和OH -)选择性和电导率的提高。与Fumatech的商用FAA3-20®和FAA3-30®膜相比,这项工作介绍了石墨烯复合膜(AEMGrs)的制备和表征。将各种量的商业石墨烯掺入NMP中的Fumion®FAA-3(10%)溶液中,然后通过Doctor-Blade(DB)方法将其用于制造新的AEM。通过具有傅里叶变换(FTIR),热重分析(TGA)和差示扫描量热法(DSC),扫描电子显微镜(SEM),动态力学分析(DMA),吸水率(WU)的红外光谱研究了商用和石墨烯复合材料的AEM。 ,离子交换容量(IEC)和平面四点电化学阻抗谱(4p-EIS)。-1)和OH -电导率(113.27毫秒cm的-1在0.01M KOH(pH值= 12)测量的)在80℃下。

更新日期:2020-06-30
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