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Ceramic Lithium Ion Conductor to Solve the Anode Coking Problem of Practical Solid Oxide Fuel Cells
Author(s) -
Wang Wei,
Wang Feng,
Chen Yubo,
Qu Jifa,
Tadé Moses O.,
Shao Zongping
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201500028
Subject(s) - anode , lithium (medication) , ceramic , materials science , conductor , oxide , ion , fuel cells , inorganic chemistry , chemical engineering , nanotechnology , engineering physics , chemistry , electrode , metallurgy , composite material , engineering , organic chemistry , medicine , endocrinology
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 0.33 La 0.56 TiO 3 (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.