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首页> 外文期刊>Journal of power sources >Vanadium proton exchange membrane water electrolyser
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Vanadium proton exchange membrane water electrolyser

机译：钒质子交换膜水电解槽

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摘要

In order to reverse the reactions of vanadium oxygen fuel cells and to regenerate vanadium redox flow battery electrolytes that have been oxidised by atmospheric oxygen, a vanadium proton exchange membrane water electrolyser was set up and investigated. Using an existing cell with a commercial and iridium-based catalyst coated membrane, it was possible to fully reduce V3.5+ and V3+ solutions to V2+ with the formation of oxygen and with coulomb efficiencies of over 96%. The cell achieved a maximum current density of 75 mA/cm(2) during this process and was limited by the proximity of the V(III) reduction to the hydrogen evolution reaction. Due to the specific reaction mechanisms of V(IV) and V(III) ions, V(III) solutions were reduced with an energy efficiency of 61%, making this process nearly twice as energy efficient as the reduction of V(IV) to V(III). Polarisation curves and electrochemical impedance spectroscopy were used to further investigate the losses of half-cell reactions and to find ways of further increasing efficiency and performance levels. (C) 2017 Elsevier B.V. All rights reserved.
机译：为了逆转钒氧燃料电池的反应并再生已被大气氧氧化的钒氧化还原液流电池电解质，建立并研究了钒质子交换膜水电解槽。使用现有的带有商业化和铱基催化剂涂层膜的电池，可以将形成的氧气和库仑效率超过96％的V3.5 +和V3 +溶液完全还原为V2 +。该电池在此过程中达到了75 mA / cm（2）的最大电流密度，并且受V（III）还原反应接近析氢反应的限制。由于V（IV）和V（III）离子的特定反应机理，V（III）溶液的还原效率为61％，这使该过程的能量效率几乎是V（IV）还原为V（IV）的两倍。 V（III）。使用极化曲线和电化学阻抗谱进一步研究了半电池反应的损失，并找到了进一步提高效率和性能水平的方法。 （C）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Journal of power sources》 |2017年第may1期|144-151|共8页
  • 作者

    Noack Jens; Roznyatovskaya Nataliya; Pinkwart Karsten; Tuebke Jens;

  • 作者单位

    Fraunhofer Inst Chem Technol, Appl Electrochem, Joseph von Fraunhofer Str 7, D-76327 Pfinztal, Germany;

    Fraunhofer Inst Chem Technol, Appl Electrochem, Joseph von Fraunhofer Str 7, D-76327 Pfinztal, Germany;

    Fraunhofer Inst Chem Technol, Appl Electrochem, Joseph von Fraunhofer Str 7, D-76327 Pfinztal, Germany;

    Fraunhofer Inst Chem Technol, Appl Electrochem, Joseph von Fraunhofer Str 7, D-76327 Pfinztal, Germany;

  • 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

    Vanadium; Oxygen; Battery; Fuel; Cell; Electrolyser;

    机译：钒;氧气;电池;燃料;电池;电解槽;

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