期刊
JOURNAL OF POWER SOURCES
卷 280, 期 -, 页码 446-452出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.01.130
关键词
Anodic current collector; Micro-tubular SOFC; Contact loss; Co-extrusion/co-sintering
资金
- EPSRC in the United Kingdom [EP/G012679/1]
- EPSRC [EP/E00136X/1, EP/G012679/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E00136X/1, EP/G012679/1] Funding Source: researchfish
High manufacturing cost and low-efficient current collection have been the two major bottlenecks that prevent micro-tubular SOFCs from large-scale application. In this work, a new nickel-based composite anode current collector has been developed for anode-supported MT-SOFC, addressing reduced cost, manufacturability and current collection efficiencies. Triple-layer hollow fibers have been successfully fabricated via a phase inversion-assisted co-extrusion process, during which a thin nickel-based inner layer was uniformly coated throughout the interior anode surface for improved adhesion with superior process economy. 10 wt.% CGO was added into the inner layer to prevent the excessive shrinkage of pure NiO, thus helping to achieve the co-sintering process. The electrochemical performance tests illustrate that samples with the thinnest anodic current collector (15% of the anode thickness) displayed the highest power density (1.07 W cm(-2)). The impedance analysis and theoretical calculations suggest that inserting the anodic current collector could dramatically reduce the percentage of contact loss down to 6 10 % of the total ohmic loss (compared to 70% as reported in literatures), which proves the high efficiencies of new current collector design. Moreover, the superior manufacturability and process economy suggest this composite current collector suitable for mass-scale production. (C) 2015 Elsevier B.V. All rights reserved.
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