Intermediate-temperature solid oxide electrolysis cells with thin proton-conducting electrolyte and a robust air electrode. Issue 44 (1st November 2017)

• Record Type: Journal Article
• Authors: Lei, Libin; Tao, Zetian; Wang, Xiaoming; Lemmon, John P.; Chen, Fanglin
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 44(2017)
• Page Start: 22945
• Page End: 22951
• Publication Date: 2017-11-01
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta05841a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A proton-conducting solid oxide electrolysis cell (H-SOEC) is a promising device that efficiently converts electrical energy to chemical energy. Abstract : A proton-conducting solid oxide electrolysis cell (H-SOEC) is a promising device that efficiently converts electrical energy to chemical energy. A H-SOEC offers a number of merits over oxygen-ion-conducting solid oxide electrolysis cells (O-SOECs). However, the development of H-SOECs is far behind that of O-SOECs, mainly due to technical challenges such as the stability of the electrolyte and electrode in a H2 O-containing atmosphere under operating conditions and the fabrication of a thin electrolyte layer. In this study, BaZr0.8 Y0.2 O3− δ (BZY) electrolyte and a Sr2 Fe1.5 Mo0.5 O6− δ (SFM) air electrode, both are stable in a H2 O-containing atmosphere under operating conditions, are evaluated in H-SOECs. In addition, in order to improve the performance of H-SOECs, a thin BZY electrolyte layer (about 16 μm in thickness) and nano-scaled SFM–BZY air electrode are fabricated successfully, showing excellent SOEC performance (−0.21 A cm −2 at 600 °C) and achieving a faradaic efficiency of 63.6% at intermediate temperature.