Investigation of nanoporous platinum thin films fabricated by reactive sputtering: Application as micro-SOFC electrode

JOURNAL OF POWER SOURCES

卷:275

Article

Jung, WooChul^1,2  Kim, Jae Jin¹  Tuller, Harry L.¹ 

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[2] Korea Adv Inst Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea

关键词: Micro solid oxide fuel cell;    Oxygen reduction reaction;    Porous platinum;    Reactive sputtering;    Thin film;   

DOI  :  10.1016/j.jpowsour.2014.11.084

来源: Elsevier

【 摘 要 】

Highly porous Pt thin films, with nano-scale porosity, were fabricated by reactive sputtering. The strategy involved deposition of thin film PtOx at room temperature, followed by the subsequent decomposition of the oxide by rapid heat treatment. The resulting films exhibited percolating Pt networks infiltrated with interconnected nanosized pores, critical for superior solid oxide fuel cell cathode performance. This approach is particularly attractive for micro-fabricated solid oxide fuel cells, since it enables fabrication of the entire cell stack. (anode/electrolyte/cathode) within the sputtering chamber, without breaking vacuum. In this work, the morphological, crystallographic and chemical properties of the porous electrode were systematically varied by control of deposition conditions. Oxygen reduction reaction kinetics were investigated by means of electrochemical impedance spectroscopy, demonstrating the critical role of nano-pores in achieving satisfactory micro-SOFC cathode performance. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free