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Performance of PEMFC with new polyvinyl-ionic liquids based membranes as electrolytes

机译:PEMFC与新型基于聚乙烯离子液体的膜作为电解质的性能

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摘要

Polymer Electrolyte Membrane Fuel Cells (PEMFC) represent a key technology for sustainable energy production due to their high efficiency and low environmental impact. The use of task specific protic ionic liquids as electrolytes is gaining interest due to their high conductivity and thermal and electrochemical stability under anhydrous conditions. Ionic liquids with the imidazolium cation exhibit a high electrochemical stability, besides sul-fonic groups can be incorporated to the cation as side chains acting as carriers in order to facilitate the proton transport. Moreover suitable anions such as Tf_2N and OTf provide high ionic conductivity. In this work, two different types of membranes based on protic ionic liquids have been tested in PEMFC under anhydrous conditions i) Nafion membranes impregnated with the protic ionic liquids l-methyl-3-(4-sulfobutyl)-imidazolium bis(trifluoromethylsulfonyl)-imide ([HSO_3-BMIm][NTf_2]) and l-butyl-3-(4-sulfobutyl)-imi-dazolium trifluoromethanesulfonate ([HSO_3-BBIm][OTf]) and, ii) membranes based on the polymerization of the specifically designed ionic liquid l-(4-sulfobutyl)-3-vinylimidazolium trifluoromethanesulfonate ([HSO_3-BVIm][OTfJ). The influence of different operation variables such as cell temperature, gas humidity and membrane thickness on the performance of the PEMFC has been analyzed, and the resistance exerted by the electrolyte was determined using electrical impedance spectroscopy. Nafion membranes impregnated with [HSO_3-BBIm][OTf] achieve current densities of 217 mA/cm~2 under anhydrous conditions at 25 ℃ whereas [HSO_3-BVIm][OTfj polymerized electrolytes provide current densities of 154 mA/cm~2 at the same conditions. This is the first report that describes the application of designed polymerized protic ionic liquids membranes for fuel cells. Although some improvements in terms of thermal and mechanical stability should be achieved, this first approach presents a promising electrolyte with challenging characteristics.
机译:聚合物电解质膜燃料电池(PEMFC)代表着可持续能源生产的关键技术,因为它们具有高效率和低环境影响的特点。由于其在无水条件下的高电导率以及热和电化学稳定性,使用任务专用质子离子液体作为电解质引起了人们的兴趣。具有咪唑鎓阳离子的离子液体显示出高的电化学稳定性,此外磺基可作为侧链作为载体并入阳离子中,以促进质子的运输。此外,合适的阴离子例如Tf_2N和OTf提供高的离子电导率。在这项工作中,已经在无水条件下在PEMFC中测试了基于质子离子液体的两种不同类型的膜:i)浸渍有质子离子液体1-N-3-(4-磺丁基)-咪唑双(三氟甲基磺酰基)-的Nafion膜酰亚胺([HSO_3-BMIm] [NTf_2])和3-丁基(4-磺丁基)-咪唑三氟甲磺酸盐([HSO_3-BBIm] [OTf])和(ii)设计的离子液体1-(4-磺丁基)-3-乙烯基咪唑三氟甲磺酸盐([HSO_3-BVIm] [OTfJ)。分析了诸如电池温度,气体湿度和膜厚度等不同操作变量对PEMFC性能的影响,并使用电阻抗光谱法确定了电解质施加的电阻。浸有[HSO_3-BBIm] [OTf]的Nafion膜在无水条件下于25℃时达到217 mA / cm〜2的电流密度,而[HSO_3-BVIm] [OTfj]聚合电解质在25℃时提供的电流密度为154 mA / cm〜2。相同的条件。这是第一个描述设计的聚合质子离子液体膜在燃料电池中的应用的报告。尽管应该在热和机械稳定性方面实现一些改进,但是该第一种方法提出了一种具有挑战性的有前景的电解质。

著录项

  • 来源
    《International journal of hydrogen energy》 |2014年第8期|3970-3977|共8页
  • 作者单位

    Department of Chemical Engineering and Inorganic Chemistry, ETSNyT, University of Cantabria, Santander, Spain;

    Department of Chemical Engineering and Inorganic Chemistry, ETSNyT, University of Cantabria, Santander, Spain;

    Department of Organic Chemistry, University of Vigo, Vigo, Spain;

    Department of Organic Chemistry, University of Vigo, Vigo, Spain;

    Department of Chemical Engineering and Inorganic Chemistry, ETSNyT, University of Cantabria, Santander, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Polymer electrolyte; Ionic liquid; Polymerized ionic liquid; Anhydrous; Membrane; Fuel cells;

    机译:高分子电解质;离子液体;聚合离子液体;无水;膜;燃料电池;
  • 入库时间 2022-08-18 00:23:56

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