报告人：陈孔发博士

报告题目：Boron deposition and poisoning of oxygen electrodes of solid oxide cells

时 间：2016年1月15日（周五）上午10：00

地 点：材料楼404会议室

邀请单位：44118太阳成城集团

Abstract:

Solid oxide cells (SOCs) are highly efficient electrochemical device to operate between solid oxide electrolysis cells (SOECs) mode to store the surplus electrical energy into chemical energy of fuels and solid oxide fuel cells (SOFCs) mode to convert the chemical energy of fuels into electrical energy. One barrier of developing durable SOCs is the substantial performance degradation due to the attack of oxygen electrodes by volatile contaminants. In this report, we will present our fundamental understanding of the deposition and poisoning of boron species from borosilicate glass sealant on the electrocatalytic activity and stability of La_0.8Sr_0.2MnO₃ (LSM) oxygen electrodes of SOCs. Under both SOFC and SOEC operating conditions, there is preferential boron deposition at the oxygen electrode/electrolyte interface, forming lanthanum borate and manganese oxide. The boron deposition leads to the significant loss of electrocatalytic activity of LSM electrode, but also accelerates the delamination of LSM electrode in the SOEC mode. We proposed that the increased activity of the highly energetic lanthanum at the LSM lattice sites at the three-phase boundary region, i.e. the electrode/electrolyte interface enhances the reaction rate between the boron species and the energetic lanthanum.

Keywords: Solid oxide fuel cells; Solid oxide electrolysis cells; Borosilicate glass; Degradation; Boron deposition and poisoning

附：陈孔发个人简历
Research Interests

·Solid oxide fuel cells (Energy conversion technology)

·Solid oxide electrolysis cells (Energy storage via H₂ generation; CO₂ capture and storage via CO₂ conversion)

Education

·09/2006-07/2009: PhD of Optics, Harbin Institute of Technology, China

·09/2004-07/2006: MSc of Condensed Matter Physics, Harbin Institute of Technology

·09/2000-07/2004: BSc of Applied Physics, Harbin Institute of Technology

Work Experience

·07/2013-present: Research Fellow, Curtin University of Technology, Australia.

·12/2010-07/2013: Post-doctoral Research Fellow, Curtin University of Technology, Australia.

·06/2009-10/2010: Research Fellow, Nangyang Technological University, Singapore.

Publications and citations

·Journal papers: 75;Book chapter: 2;

Conference presentations/publications: 22;    Patents: 11

·Citations (Assessed on 20 Oct 2015):

Web of Science statistics: h-index: 21, 15 cites per article, 1078 citations

Scopus statistics: h-index: 22, 1128 citations

Google Scholar statistics: h-index: 24, 1335 citations