A Statistical Study of Proton Conduction in Nafion®-based Composite Membranes: Prediction, Filler Selection and Fabrication Methods
A Statistical Study of Proton Conduction in Nafion®-based Composite Membranes: Prediction, Filler Selection and Fabrication Methods
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Nafion® 基复合膜中质子传导的统计研究：预测、填料选择和制造方法
DOI：
10.1016/j.memsci.2017.12.025
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发表时间：
2017
影响因子：
9.5
通讯作者：
李云琦
中科院分区：
文献类型：
--
作者：
刘伦洋;陈文多;李云琦
Nafion®是制造质子交换膜（PEM）最广泛使用的材料。有机和无机填料的适当选择以及相应的制造方法确保了PEM的高性能。本文对224份原始实验报告进行了全面的调查统计，这些原始报告记录了材料的组成、制造和性能指标。隐式和显式预测模型的基础上构建的原始，有机填料和无机填料的Nafion复合膜的分类。构建这些模型的功能进行了优化，明确的预测模型提供的信心得分平均为0.86，0.68和0.84的三个类别的Nafion膜，分别。隐式预测模型显示出更高的信心来解释这些来自不同来源的数据。此外，提取了不同类别的填料的热力学贡献，并且通过在10.0-21.7 kJ/mol的范围内的活化能圈出能够显著增强质子传导同时满足甲醇穿透的延迟的有效填料。还提供了以不同方式制备的膜的质子传导率的比较，其中浸渍处理总是有助于实现更高的质子传导率。我们的统计研究表明，亲水性填料的层状结构和高比表面积应实际适用于改善质子传导的Nafion膜。
Nafion®is the most widely used material to fabricate proton exchange membranes (PEMs). High performance of PEMs is ensured from the proper selection of organic and inorganic fillers, and the corresponding fabrication methods. We carried out a statistical study on a comprehensive survey of 224 original experimental reports with full records of composition, fabrication and performance indices. Implicit and explicit predictive models are constructed based on the classification of pristine, organic-filler and inorganic-filler Nafion composite membranes. Features to construct these models are optimized and the explicit predictive models provide confidence score averaged at 0.86, 0.68 and 0.84 for the three classes of Nafion membranes, respectively. Implicit predictive models show even higher confidence to interpret these data from diverse sources. Further, thermodynamic contributions for different classes of fillers are extracted, and potent fillers, which can significantly enhance the proton conduction meanwhile satisfying the retardation of methanol crossover, are circled out by activation energies at a range of 10.0–21.7 kJ/mol. Comparison of the proton conductivities for membranes fabricated in different ways is also provided, where impregnation treatment always helps the achievement of higher proton conductivities. Our statistical study suggests that hydrophilic fillers with layered structure and high specific surface area should be practically applicable to improve the proton conduction in Nafion membranes.