Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
635922 | Journal of Membrane Science | 2010 | 8 Pages |
Abstract
In this study, Ni-CGO anodes hollow fibre with controlled asymmetric structures, i.e. adjustable ratios between thickness of the outer sponge-like and the inner finger-like layers, have been developed for intermediate temperature micro-tubular solid oxide fuel cells (SOFCs), using a combined phase inversion/sintering technique followed by a post-reduction process. The control over the asymmetric structure is achieved by employing ethanol as a non-solvent to adjust the initial properties of the spinning suspensions, which affects the phase inversion process and results in a series of asymmetric structures from very thin sponge-like layer supported on considerably thicker finger-like layer (0Â wt.% ethanol), to the one consisting of nearly a full sponge-like structure (35Â wt.% ethanol). The characteristic of the anode hollow fibre is found significantly affected by such changes in asymmetric structures. For example, the experimental results show that the mechanical strength and electrical conductivity increase up to 241Â MPa and 11,246Â SÂ cmâ1, respectively, but with high resistance for the fuel transport for a full sponge-like structure of the fibres prepared with 35Â wt.% of ethanol.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Mohd Hafiz Dzarfan Othman, Zhentao Wu, Nicolas Droushiotis, Geoff Kelsall, K. Li,