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Spray drying as a novel and scalable fabrication method for nanostructured CsH2PO4, Pt-thin-film composite electrodes for solid acid fuel cells

机译:喷雾干燥作为固体酸燃料电池纳米结构CsH2PO4,Pt薄膜复合电极的新颖且可扩展的制造方法

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Spray drying was explored as a new CsH2PO4 nanoparticle synthesis method and a systematic parameter study was conducted to discover the set leading to optimal deposition rate and particle size distribution for applications in solid acid fuel cell electrodes. The nanoparticles were deposited directly onto either a carbon paper current collector or a dense CsH2PO4 electrolyte pellet with a deposition rate of 1 mg h(-1) cm(-2) measured to be the same order of magnitude as for previously employed electrospray. However, the total nanoparticle production rate is at 165 mg h(-1) almost two orders of magnitude higher than the total production rate of electrospray. Novel, high performance solid acid fuel cell electrodes were fabricated by depositing CsH2PO4 nanoparticles onto a dense, uniaxially pressed CsH2PO4 electrolyte pellet, forming a three dimensional, porous, interconnected nanostructure, and thus providing a large surface area for subsequent Pt thin film deposition via magnetron sputtering. Electrochemical measurements via impedance spectroscopy in a symmetric cell configuration Pt + CsH2PO4 vertical bar CsH2PO4 vertical bar CsH2PO4 + Pt show good reproducibility, excellent mass normalized activity as well as stability over a 24 h period.
机译:喷雾干燥被作为一种新的CsH2PO4纳米颗粒合成方法进行了探索,并进行了系统的参数研究,以发现能够在固体酸燃料电池电极中获得最佳沉积速率和粒径分布的装置。将纳米颗粒直接沉积到碳纸集电器或致密的CsH2PO4电解质颗粒上,沉积速率为1 mg h(-1)cm(-2),测量值与先前使用的电喷雾相同。但是,总纳米粒子的生产率为165 mg h(-1),几乎比电喷雾的总生产率高两个数量级。通过将CsH2PO4纳米颗粒沉积到致密的,单轴压制的CsH2PO4电解质颗粒上,形成三维多孔相互连接的纳米结构,从而为随后的磁控管沉积Pt薄膜提供较大的表面积,从而制造出新型的高性能固体酸燃料电池电极。溅射。 Pt + CsH2PO4垂直条CsH2PO4垂直条CsH2PO4 + Pt在对称电池配置中通过阻抗光谱进行的电化学测量显示出良好的重现性,出色的质量归一化活性以及24小时的稳定性。

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