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首页> 外文期刊>Journal of power sources >Unusual influence of binder composition and phosphoric acid leaching on oxygen mass transport in catalyst layers of high-temperature proton exchange membrane fuel cells
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Unusual influence of binder composition and phosphoric acid leaching on oxygen mass transport in catalyst layers of high-temperature proton exchange membrane fuel cells

机译：粘合剂组合物和磷酸浸出对高温质子交换膜燃料电池催化剂层氧气传输的不寻常影响

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摘要

Oxygen mass transport in the cathode catalyst layer (CCL) of high-temperature proton exchange membrane fuel cells (HT-PEMFCs) plays an important role in promoting the fuel cell performance. The objective of this study is the development of suitable tools and analytical methods for quantitatively characterizing O-2 mass transport coefficients in a binder used in HT-PEMFCs from a microscopic and local perspective. A microelectrode electrochemical system with high sensitivity and stability is built in-house. High-resolution cyclic voltammetry, potential-step chronoamperometry and sampled chronoamperometry at the nA scale are successfully performed in a shielding box to determine the O-2 mass transport coefficients in a poly (ethersulfone)-poly (vinyl pyrrolidone) (PES-PVP) blend binder with different PVP contents. In addition, we investigate the effect of phosphoric acid (PA) leaching on O-2 mass transport in the binder, which is generally used to explain the decline in membrane conductivity. Linear regression analysis reveals that the permeability of O-2 in binder can be affected significantly by the PVP content and the PA doping level of the binder in CCL.
机译：在高温质子交换膜燃料电池（HT-PEMFC）的阴极催化剂层（CCL）中的氧气传输在促进燃料电池性能方面起着重要作用。本研究的目的是在来自微观和局部观点的HT-PEMFC中使用的粘合剂中定量表征合适的工具和分析方法的应用。内部建造具有高灵敏度和稳定性的微电极电化学系统。在屏蔽盒中成功地进行高分辨率循环伏安法，电位步骤计时和Na Scale的采样时间计量法，以确定聚（醚砜）-poly（乙烯基吡咯烷酮）（PES-PVP）中的O-2质量传递系数融合粘合剂，具有不同的PVP含量。此外，我们研究磷酸（PA）浸出在粘合剂中O-2质量转运上的效果，其通常用于解释膜导电性的下降。线性回归分析表明，通过CCL中的PVP含量和粘合剂的PA掺杂水平可以显着影响粘合剂中的渗滤物的渗透性。

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  • 来源
    《Journal of power sources》 |2020年第15期|228616.1-228616.7|共7页
  • 作者

    Zhang Shuomeng; Zhang Jujia; Zhu Zejie; Liu Pan; Cao Fahe; Chen Jian; He Qinggang; Dou Mei; Nan Suifei; Lu Shanfu;

  • 作者单位

    Zhejiang Univ Coll Chem & Biol Engn Hangzhou 310027 Zhejiang Peoples R China|Inst Zhejiang Univ Quzhou 78 Jiuhua Blvd North Quzhou 32400 Zhejiang Peoples R China;

    Beihang Univ Sch Space & Environm Beijing Key Lab Bioinspired Energy Mat & Devices Beijing 100191 Peoples R China;

    Zhejiang Univ Dept Chem Hangzhou 310027 Zhejiang Peoples R China;

    Zhejiang Univ Dept Chem Hangzhou 310027 Zhejiang Peoples R China;

    Sun Yat Sen Univ Sch Mat Guangzhou 510006 Peoples R China;

    Zhejiang Univ Coll Control Sci & Engn State Key Lab Ind Control Technol Hangzhou 310027 Peoples R China|Zhejiang Univ Ningbo Res Inst Ningbo 315100 Zhejiang Peoples R China;

    Zhejiang Univ Coll Chem & Biol Engn Hangzhou 310027 Zhejiang Peoples R China|Inst Zhejiang Univ Quzhou 78 Jiuhua Blvd North Quzhou 32400 Zhejiang Peoples R China|Zhejiang Univ Ningbo Res Inst Ningbo 315100 Zhejiang Peoples R China;

    Zhejiang Univ Coll Chem & Biol Engn Hangzhou 310027 Zhejiang Peoples R China;

    Zhejiang Univ Coll Chem & Biol Engn Hangzhou 310027 Zhejiang Peoples R China|Inst Zhejiang Univ Quzhou 78 Jiuhua Blvd North Quzhou 32400 Zhejiang Peoples R China;

    Beihang Univ Sch Space & Environm Beijing Key Lab Bioinspired Energy Mat & Devices Beijing 100191 Peoples R 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

    Oxygen mass transport; Microelectrode; Binder composition; Phosphoric acid leaching; High-temperature proton exchange membrane fuel cells;

    机译：氧气传输;微电极;粘合剂组合物;磷酸浸出;高温质子交换膜燃料电池;

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