New fabrication techniques for micro-tubular hollow finer solid oxide fuel cells
File(s)ECS_Transactions_MT-SOFCs_14Nov12.pdf (402.27 KB)
Accepted version
Author(s)
Droushiotis, N
Hankin, A
Kelsall, GH
Type
Journal Article
Abstract
A novel combination of phase inversion and electrophoretic deposition was used in the fabrication of anode supported micro tubular (hollow fiber) solid oxide fuel cells (MT-HF-SOFCs). The phase inversion process was used to produce ca. 240 μm thick, highly porous 60 wt. % NiO-40 wt. % yttria-stabilised zirconia (YSZ) hollow fiber anode precursors. The electrophoretic deposition process was then used to apply ca. 40 μm thick, particulate YSZ electrolyte layers onto the unsintered NiO-YSZ HFs from an ethanol suspension at an applied electric field of ca. 0.22 kV cm-1. The YSZ-coated NiO-YSZ HFs were sintered at 1500 oC for twelve hours. Dispersions of YSZ-LSM particles were then painted on top of the electrolyte layer, as ‘graded’ YSZ-LSM porous cathode precursors that were sintered at 1200 oC for three hours. The fabrication process was completed by winding silver wire current collectors spirally round the cathodes and through the lumen of the fibers to enable current collection from the anodes. Single MT-HF-SOFCs delivered peak power densities of 0.20, 0.18 and 0.14 W cm-2 at 800, 750 and 700 oC, respectively, with flow rates of 15 cm3 min-1 H2 (97% H2-3% H2O) and 30 cm3 min-1 of air.
Date Issued
2013-06-10
Date Acceptance
2013-06-10
Citation
ECS Transactions, 2013, 50 (45)
ISSN
1938-6737
Publisher
Electrochemical Society
Journal / Book Title
ECS Transactions
Volume
50
Issue
45
Copyright Statement
Copyright 2013, The Electrochemical Society
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Grant Number
EP/E00136X/1
Publication Status
Published