Performance characteristics of 100 W carbon fuel cell stack based on SOFC technology

Usman Mushtaq, Sun Kyung Kim, Rak Hyun Song, Tak Hyoung Lim, Jong Won Lee, Seung Bok Lee, Seok Joo Park

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

5 Citations (Scopus)

Abstract

Carbon Fuel Cells (CFCs) run on carbon-rich fuels such as coal and biomass. Owing to their high theoretical efficiencies, they have been studied for stationary power generation. This work presents the fabrication and operation of a 100W SOFC-based CFC stack, consisting of 5 bundles with 6 tubular cells per bundle. 8 mol%Y2O3-stabilized ZrO2 (8YSZ) electrolyte and layers of La0.8Sr0.2MnO3-8YSZ/La0.6Sr0.4Fe0.8Co0.2O3 cathode were coated on Ni-8YSZ anode support, with an active electrode area of 60cm2 per cell. 6 cells were embedded vertically on a fuel gas manifold and interconnected electrically in parallel within a bundle. 5 bundles were sealed and stacked in series electrically. The stack was connected to carbon fuel chambers containing mixture of activated carbon and potassium carbonate. The carbon fuel mixture was agitated with carbon dioxide to promote reverse Boudouard reaction, thus providing carbon monoxide as fuel. The stack and the fuel chambers were operated simultaneously in a heating furnace. The CFC stack showed 111.5W at 850°C and its average voltage degradation rate is 0.67 V/kh for 50 hours. The CFC stack degradation during long-term operation was analyzed and discussed as related to microstructural change, poisoning by impurities and electrochemical cell.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 14, SOFC 2015
EditorsS. C. Singhal, K. Eguchi
PublisherElectrochemical Society, Inc.
Pages2413-2419
Number of pages7
ISBN (Electronic)9781623322717
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage - Glasgow, United Kingdom
Duration: 26 Jul 201531 Jul 2015

Publication series

NameECS Transactions
Number1
Volume68
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

Conference14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage
Country/TerritoryUnited Kingdom
CityGlasgow
Period26/07/1531/07/15

Bibliographical note

Publisher Copyright:
© The Electrochemical Society.

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