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Composite Nafion Membranes with CaTiO3−δ Additive for Possible Applications in Electrochemical Devices

机译:含CaTiO3-δ添加剂的复合Nafion膜在电化学装置中的可能应用

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摘要

A composite membrane based on a Nafion polymer matrix incorporating a non-stoichiometric calcium titanium oxide (CaTiO ) additive was synthesized and characterized by means of thermal analysis, dynamic mechanical analysis, and broadband dielectric spectroscopy at different filler contents; namely two concentrations of 5 and 10 wt.% of the CaTiO additive, with respect to the dry Nafion content, were considered. The membrane with the lower amount of additive displayed the highest water affinity and the highest conductivity, indicating that a too-high dose of additive can be detrimental for these particular properties. The mechanical properties of the composite membranes are similar to those of the plain Nafion membrane and are even slightly improved by the filler addition. These findings indicate that perovskite oxides can be useful as a water-retention and reinforcing additive in low-humidity proton-exchange membranes.
机译:合成了基于Nafion聚合物基体并掺有非化学计量的钙钛氧化物(CaTiO)添加剂的复合膜,并通过热分析,动态力学分析和宽带介电谱在不同填料含量下进行了表征。即,相对于干Nafion含量,考虑了两种浓度的5重量%和10重量%的CaTiO添加剂。具有较低添加剂量的膜表现出最高的水亲合力和最高的电导率,表明过高剂量的添加剂可能对这些特定性能有害。复合膜的机械性能与Nafion普通膜的机械性能相似,甚至通过添加填料也会略有改善。这些发现表明钙钛矿氧化物可用作低湿度质子交换膜中的保水和增强添加剂。

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