Ceramic Lithium Ion Conductor to Solve the Anode Coking Problem of Practical Solid Oxide Fuel Cells. Issue 17 (29th April 2015)

• Record Type: Journal Article
• Authors: Wang, Wei; Wang, Feng; Chen, Yubo; Qu, Jifa; Tadé, Moses O.; Shao, Zongping
• Is Part Of: ChemSusChem. Volume 8:Issue 17(2015:Sep.)
• Page Start: 2978
• Page End: 2986
• Publication Date: 2015-04-29
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201500028
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>For practical solid oxide fuel cells (SOFCs) operated on hydrocarbon fuels, the facile coke formation over Ni‐based anodes has become a key factor that limits their widespread application. Modification of the anodes with basic elements may effectively improve their coking resistance in the short term; however, the easy loss of basic elements by thermal evaporation at high temperatures is a new emerging problem. Herein, we propose a new design to develop coking‐resistant and stable SOFCs using Li⁺‐conducting Li_0.33La_0.56TiO₃ (LLTO) as an anode component. In the Ni/LLTO composite, any loss of surface lithium can be efficiently compensated by lithium diffused from the LLTO bulk under operation. Therefore, the SOFC with the Ni/LLTO anode catalyst layer yields excellent power outputs and operational stability. Our results suggest that the simple adoption of a Li⁺ conductor as a modifier for Ni‐based anodes is a practical and easy way to solve the coking problem of SOFCs that operate on hydrocarbons.</p> </abstract>