共查询到19条相似文献,搜索用时 109 毫秒
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新型燃料电池用质子交换膜研究进展 总被引:7,自引:0,他引:7
传统的全氟磺酸膜Nation、Dow质子交换膜、Flemion等目前在质子交换膜燃料电池中的应用最为广泛,但在高温条件下以氢或甲醇作为燃料的燃料电池中,其性能受到一定的影响,且这类膜价格昂贵,不利于推广应用,阻碍了燃料电池的商业化进程。因此,开发一种新型的价格低廉、性能良好的膜是推广应用此类电池的关键。本文简要介绍了目前各国研究的应用于高温条件下(100~160℃)质子交换膜燃料电池与直接甲醇燃料电池中的新型膜。对它们的质子传导率、甲醇渗透率等性能进行了分析比较。 相似文献
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燃料电池用磺化聚醚醚酮质子交换膜的研究 总被引:3,自引:0,他引:3
通过浓硫酸磺化法制备了具有不同磺化程度的磺化聚醚醚酮(SPEEK),并对此种质子交换膜进行了物化性能和H2/O2质子交换膜燃料电池性能研究,实验结果表明,SPEEK膜具有较理想的力学稳定性和气体渗透率,它的微观结构和质子传导性能与Nafion膜有所不同,经过其H2/O2质子交换膜燃料电池的性能研究,SPEEK膜能够保证电池在200h内稳定运行,有希望成为PEMFC用质子交换膜材料。 相似文献
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质子交换膜是质子交换膜燃料电池(PEMFC)的和绝缘电子的作用,其性能和寿命直接决定电池的性能和寿命.从膜材料的角度分类,综述了质子交换膜燃料电池用主链含氟聚合物膜、元素有机聚合物膜以及芳香族碳氢化合物膜的特性和研究现状. 相似文献
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燃料电池用质子交换膜的研究进展 总被引:1,自引:0,他引:1
介绍了各种新型质子交换膜(PEM)的研究开发状况,阐述了对全氟磺酸树脂膜改性的研究进展,并对质子交换膜的研究方向和趋势进行了预测. 相似文献
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简要介绍了燃料电池的定义、分类及其特点.介绍了全氟磺酸质子交换膜中质子传输机理,按质子交换膜材料的不同,分类回顾了近年来全氟磺酸质子交换膜、部分含氟质子交换膜等领域的研究进展,并展望了今后的研究趋势. 相似文献
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Carbone A Saccà A Busacca C Frontera P Antonucci PL Passalacqua E 《Journal of nanoscience and nanotechnology》2011,11(10):8768-8774
The introduction of different reinforcement materials (yarns, fibrils, etc) into the membranes has been investigated with the aim of maintaining adequate membrane properties in terms of mechanical strength, good chemical stability, low swelling at critical temperatures and a stable electrochemical performance in PEFC. An innovative technique for the development of membranes is based on polymeric films containing polymeric nanofibres obtained through electrospinning. The electrospinning of Nafion blends with polyvinylpirrolidone (PVP) and polystyrene (PS) was investigated in this work. In particular, the morphology and diameter of electrospun fibres as a function of the electrospinning parameters and solution preparation have been studied and in both cases, a critical concentration of blend solution was found. Beaded fibres were obtained above such a concentration and, below it, only fibre mats were observed. Reinforced Nafion-based membranes were realised by using the obtained spun films. Preliminary proton conductivity and fuel cell results have shown the capability of operating in a fuel cell environment with a slightly higher performance than pure Nafion but having an improved stability at high temperatures. 相似文献
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While polymer electrolyte membrane fuel cells (PEMFCs) have surged in popularity due to their low environmental impact and high efficiency, their susceptibility to degradation by in-situ generated peroxide and oxygen radical species has prevented their widespread adoption. To alleviate chemical attack on components of PEMFCs, particularly on polymer electrolyte membranes (PEMs), antioxidant approaches have been the subject of enormous interest as a key solution because they can directly scavenge and remove detrimental peroxide and oxygen radical species. However, a consequence is that long-term PEMFC device operation can cause undesirable adverse degradation of antioxidant additives provoked by the distinctive chemical/electrochemical environment of low pH, electric potential, water flux, and ion exchange/concentration gradient. Moreover, changes in the physical state such as migration, agglomeration, and dissolution of antioxidants by mechanical or chemical pressures are serious problems that gradually deteriorate antioxidant activity and capacity. This review presents current opportunities for and limitations to antioxidant therapy for durability enhancement in PEMs for electrochemical device applications. We also provide a summary of advanced synthetic design strategies and in-depth analyses of antioxidants regarding optimizing activity-stability factors. This review will bring new insight into the design to realization of ideal antioxidant nanostructures for PEMs and open up new opportunities for enhancing proliferation of durable PEMFCs. 相似文献
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The polymer electrolyte membrane fuel cell (PEMFC) has been studied actively for both potable and stationary applications because it can offer high power density and be used only hydrogen and oxygen as environment-friendly fuels. Nafion which is widely used has mechanical and chemical stabilities as well as high conductivity. However, there is a drawback that it can be useless at high temperatures (> or = 90 degrees C) because proton conducting mechanism cannot work above 100 degrees C due to dehydration of membrane. Therefore, PEMFC should be operated for long-term at high temperatures continuously. In this study, we developed nanocomposite membrane using stable properties of Nafion and phosphonic acid groups which made proton conducting mechanism without water. 3-Aminopropyl triethoxysilane (APTES) was used to replace sulfonic acid groups of Nafion and then its aminopropyl group was chemically modified to phosphonic acid groups. The nanocomposite membrane showed very high conductivity (approximately 0.02 S/cm at 110 degrees C, <30% RH). 相似文献
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Simon Atkinson 《Membrane Technology》2004,2004(5):7-9
Here, we round up some recent developments in polymer electrolyte (proton-exchange) membrane-based fuel cell technology. 相似文献
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石墨烯是最近几年才发现的炭材料的新成员, 其完美的二维结构和许多奇特的性质, 引起了科学家的极大兴趣。石墨烯和氧化石墨烯的改性以及各种石墨烯/聚合物复合材料的制备成为当前研究的热点之一。与纯的聚合物相比, 石墨烯的加入可赋予复合材料不同的功能性, 不但表现出优异的力学和电学性能, 且具有优良的加工性能, 为复合材料提供了更广阔的应用空间。文中概述了石墨烯/聚合物复合材料的制备方法、结构及性能, 并展望了石墨烯及其聚合物复合材料的研究前景。 相似文献
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