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Title: Fabrication and evaluation of a novel wavy Single Chamber Solid Oxide Fuel Cell via in-situ monitoring of curvature evolution
Authors: Choi, Indae
Kim, Jung-Sik
Venkatesan, Vijay
Ranaweera, Manoj Prasanna
Keywords: Single Chamber; Solid Oxide Fuel Cell; In-situ; Curvature; Co-sintering
Issue Date: 2017
Publisher: © The Authors. Published by Elsevier Ltd.
Citation: CHOI, I. ...et al., 2017. Fabrication and evaluation of a novel wavy Single Chamber Solid Oxide Fuel Cell via in-situ monitoring of curvature evolution. Applied Energy, 195, pp. 1038–1046.
Abstract: Wavy type Single Chamber Solid Oxide Fuel Cells (SC-SOFCs) are beneficial for improved triple phase boundary conditions contributing to higher performance, compared with planar type SC-SOFCs of the same diameter. This study presents a fabrication process for wavy-type, cathode-supported SC-SOFCs with a single fabrication step via co-sintering of a triple-layer structure consisting of NiO/CGO-CGO-LSCF, with a thickness ratio of 1:3:9 respectively. Curvature evolution occurs due to different sintering behaviour of each layer during the co-sintering process. In-situ observation of each layer during the co-sintering process allows for minimisation of mismatched stresses to avoid unnecessary warping and cracking. Bilayers, consisting of NiO/CGO-CGO and CGO-LSCF, are co-sintered at 1200°C. In-situ observation, to monitor the shrinkage of each material and the curvature evolution of the structures, is performed using a long focus microscope (Infinity K-2). Monitoring curvature behaviour in real time minimised the development of undesired curvature in the triple-layer structure. Performance testing of wavy cell is carried out in a methane-air mixture (CH4:O2 =1:1). The wavy SC-SOFC generated 0.39 V and 9.7 mWcm-2 at 600°C, which produced 260% and 540% increments in OCV and in maximum power density, respectively, over the planar SC-SOFC under the same operational conditions.
Description: This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: This research received partial financial support from the India-UK Collaborative Research Initiative in Fuel Cells project on “Modelling Accelerated Ageing and Degrad ation of Solid Oxide Fuel Cells (EP/I037059/1)
Version: Published version
DOI: 10.1016/j.apenergy.2017.03.090
URI: https://dspace.lboro.ac.uk/2134/24664
Publisher Link: http://dx.doi.org/10.1016/j.apenergy.2017.03.090
ISSN: 0306-2619
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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