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首页> 外文期刊>Advanced Functional Materials >Designing a new generation of proton-exchange membranes using layer-by-layer deposition of polyelectrolytes
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Designing a new generation of proton-exchange membranes using layer-by-layer deposition of polyelectrolytes

机译：使用聚电解质的逐层沉积设计新一代质子交换膜

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摘要

All fuel cells utilizing the membrane-electrode assembly have their ion-conductive membrane sandwiched between bipolar plates. Unfortunately, applying conventional techniques to isolated polyelectrolyte membranes is challenging and difficult. A more practical alternative is to use the layer-by-layer assembly technique to fabricate a membrane-electrode assembly that is technologically relatively simple, economic, and robust. The process presented here paves the way to fabricate ion-conductive membranes tailored for optimum performance in terms of controlled thickness, structural morphology and catalyst loading. Composite membranes are constructed through the layered assembly of ionically conductive multilayer thin films atopia porous polycarbonate membrane. Under ambient conditions, a fuel cell using a poly(ethylene oxide)/poly(acrylic acid) (PEO/PAA) composite membrane delivers a maximum power density of 16.5 mW cm(-2) at a relative humidity of 55% which is close to that of some commercial fuel cells operating under the same conditions. Further optimization of these systems may lead to new, ultrathin, flexible fuels cells for portable power and micropower applications.
机译：所有使用膜电极组件的燃料电池的离子导电膜都夹在双极板之间。不幸的是，将常规技术应用于分离的聚电解质膜是具有挑战性和困难的。一种更实用的替代方案是使用逐层组装技术来制造技术上相对简单，经济且坚固的膜电极组件。本文介绍的工艺为制造可控制厚度，结构形态和催化剂负载量以获得最佳性能的离子导电膜铺平了道路。复合膜是通过离子导电多层薄膜Atopia多孔聚碳酸酯膜的分层组装而构建的。在环境条件下，使用聚环氧乙烷/聚丙烯酸（PEO / PAA）复合膜的燃料电池在相对湿度为55％时的最大功率密度为16.5 mW cm（-2），接近于与某些在相同条件下运行的商用燃料电池相比这些系统的进一步优化可能会导致用于便携式电源和微功率应用的新型超薄柔性燃料电池。

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