title: Inkjet-Printed Porous Silver Thin Film as a Cathode for a Low-Temperature Solid Oxide Fuel Cell.
abstract: In this work we report a porous silver thin film cathode that was fabricated by a simple inkjet printing process for low-temperature solid oxide fuel cell applications. The electrochemical performance of the inkjet-printed silver cathode was studied at 300-450 °C and was compared with that of silver cathodes that were fabricated by the typical sputtering method. Inkjet-printed silver cathodes showed lower electrochemical impedance due to their porous structure, which facilitated oxygen gaseous diffusion and oxygen surface adsorption-dissociation reactions. A typical sputtered nanoporous silver cathode became essentially dense after the operation and showed high impedance due to a lack of oxygen supply. The results of long-term fuel cell operation show that the cell with an inkjet-printed cathode had a more stable current output for more than 45 h at 400 °C. A porous silver cathode is required for high fuel cell performance, and the simple inkjet printing technique offers an alternative method of fabrication for such a desirable porous structure with the required thermal-morphological stability.
authors.forename: Chen-Chiang
authors.initials: CC
authors.lastname: Yu
authors.forename: Jong Dae
authors.initials: JD
authors.lastname: Baek
authors.affiliation: Department of Chemical Engineering, National Taiwan University , No. 1, Section 4, Roosevelt Road, Taipei, Taiwan 10617.
authors.forename: Chun-Hao
authors.initials: CH
authors.lastname: Su
authors.forename: Liangdong
authors.initials: L
authors.lastname: Fan
authors.affiliation: Singapore Institute of Manufacturing Technology , 71 Nanyang Drive, Singapore 638075.
authors.forename: Jun
authors.initials: J
authors.lastname: Wei
authors.affiliation: Department of Chemical Engineering, National Taiwan University , No. 1, Section 4, Roosevelt Road, Taipei, Taiwan 10617.
authors.forename: Ying-Chih
authors.initials: YC
authors.lastname: Liao
authors.forename: Pei-Chen
authors.initials: PC
authors.lastname: Su
keywords: electrochemical impedance spectroscopy (EIS); inkjet printing; low-temperature solid oxide fuel cell (LT-SOFC); silver thin film cathode; sputtering