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首页> 外文期刊>Journal of power sources >Lamellar crystals as proton conductors to enhance the performance of proton exchange membrane for direct methanol fuel cell
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Lamellar crystals as proton conductors to enhance the performance of proton exchange membrane for direct methanol fuel cell

机译：层状晶体作为质子导体，可增强直接甲醇燃料电池质子交换膜的性能

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摘要

Zirconium glyphosate (ZrG) is a solid proton conductor with layered crystal structure. The inorganic veneer sheets of ZrG are covalently intercalated by glyphosate molecules with carboxylic acid end groups (-COOH). The existence of abundant -COOH groups both inside and on the surface of ZrG provides additional proton-conducting channels facilitating the proton conduction through and around the inorganic crystals. ZrG is incorporated into the sulfonated polyether ether ketone (SPEEK) matrices to prepare proton-conducting hybrid membranes. The conductivity of the hybrid membranes is higher than the pristine SPEEK membrane, and increases with increasing ZrG content. Furthermore, the enhancement of the proton conductivity is more obvious at elevated temperatures. At 25 C, the proton conductivity of the hybrid membrane with 16 wt% ZrG is 1.4 times higher than that of the pristine membrane. When the temperature increases to 55 C, the conductivity of the hybrid membrane with 8wt% ZrG is more than twice that of the pristine SPEEK membrane. The prolonged and tortuous pathways originated from the incorporation of inorganic crystals lead to reduced methanol permeability. The selectivity of the hybrid membrane is increased by as much as 72% compared to the pristine SPEEK membrane.
机译：草甘酸锆（ZrG）是具有层状晶体结构的固体质子导体。 ZrG的无机单板片被具有羧酸端基（-COOH）的草甘膦分子共价插入。 ZrG内部和表面上均存在大量的-COOH基团，从而提供了额外的质子传导通道，从而促进了质子通过无机晶体及其周围的传导。将ZrG掺入磺化聚醚醚酮（SPEEK）基质中以制备质子传导杂化膜。杂化膜的电导率高于原始SPEEK膜，并随着ZrG含量的增加而增加。此外，在升高的温度下，质子传导性的增强更加明显。在25℃下，具有16wt％的ZrG的杂化膜的质子电导率是原始膜的质子电导率的1.4倍。当温度升至55°C时，ZrG含量为8wt％的杂化膜的电导率是原始SPEEK膜的电导率的两倍以上。源自无机晶体结合的延长而曲折的路径导致甲醇渗透性降低。与原始SPEEK膜相比，杂化膜的选择性提高了72％。

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  • 来源
    《Journal of power sources》 |2011年第15期|p.6015-6021|共7页
  • 作者

    Yuning Zhao; Zhongyi Jiang; Lulu Xiao; Tao Xu; Hong Wu;

  • 作者单位

    Key Laboratory for Green Chemical Technology, Ministry of Education of China, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;

    Key Laboratory for Green Chemical Technology, Ministry of Education of China, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;

    Key Laboratory for Green Chemical Technology, Ministry of Education of China, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;

    Key Laboratory for Green Chemical Technology, Ministry of Education of China, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;

    Key Laboratory for Green Chemical Technology, Ministry of Education of China, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China,Tianjin Key Laboratory of Membrane Science and Desalination Technology, Tianjin University, Tianjin 300072, China;

  • 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

    zirconium glyphosate; sulfonated polyether ether ketone; proton conduction; hybrid membrane; direct methanol fuel cell;

    机译：草甘膦锆;磺化聚醚醚酮;质子传导混合膜直接甲醇燃料电池;

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