制作
质子交换膜燃料电池
膜电极组件
电极
材料科学
电解质
阳极
图层(电子)
纳米技术
膜
化学工程
贵金属
多孔性
复合材料
燃料电池
化学
金属
冶金
物理化学
替代医学
病理
工程类
医学
生物化学
作者
Melanie Bühler,Carolin Klose,Friedemann Hegge,Thomas Lickert,Simon Thiele
出处
期刊:Meeting abstracts
日期:2017-09-01
卷期号:MA2017-02 (37): 1651-1651
标识
DOI:10.1149/ma2017-02/37/1651
摘要
State-of-the-art polymer electrolyte membrane water electrolyzers (PEMWEs) are assembled via sandwiching a catalyst coated membrane (CCM) between porous transport layers (PTLs). In this work we investigate electrodes deposited directly on PTLs. Together with the novel fabrication technique ‘direct membrane deposition’ (DMD, Fig 1a-c) - already successfully tested for PEM fuel cells [1,2] – this approach is supposed to lead to high performance MEAs for PEMWE. In DMD the fuel cell is assembled as two half-cells with the gas diffusion layers (GDLs) serving as the base for directly depositing the catalyst and the membrane layer. With this technique contact resistances and mass transport in PEM fuel cells were shown to be substantially improved and a reduction of the noble metal loading was enabled [3].However for the application of DMD a smooth and crack-free electrode surface is required [4]. Since state-of-the-art PTLs like Titanium fiber or powder sinter materials at the anodic side exhibit relatively large pores compared to the size of catalyst particles, the fabrication of a smooth catalyst layer on top of the PTL is the first step to establish the DMD method for PEMWEs (Fig. 1d). In this work we present our latest results on this novel topic and show current challenges and perspectives. References [1] M. Klingele et al.: Journal of Materials Chemistry A 3 (2015) 11239 - 11245. [2] S. Vierrath et al.: Journal of Power Sources 326 (2016) 170 - 175. [3] M. Breitwieser et al.: Electrochemistry Communications 60 (2015) 168 - 171. [4] M. Breitwieser et al.: Journal of Power Sources 351 (2015) 145-150. Figure 1
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