caa a22 4500 475815874 CHVBK 20180406123810.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1023/A:1003987318963 doi (NATIONALLICENCE)springer-10.1023/A:1003987318963 Durability test of SOFC cathodes [Elektronische Daten] [M.J. Jørgensen, P. Holtappels, C.C. Appel] The durability of solid oxide fuel cell (SOFC) composite cathodes of lanthanum strontium manganite and yttria stabilised zirconia was investigated. The cathodes were kept at constant, realistic operating conditions (−300 mA cm−2 at 1000 °C in air) for up to 2000 h. After the 2000 h test the increase in electrode overvoltage exceeded 100% of the initial value. Nominally identical cathodes kept for 2000 h at 1000 °C in air without current load for comparison showed little or no degradation. Thus, the current load of −300 mA cm−2, rather than the operation temperature of 1000 °C, was responsible for the degradation. Structural analysis showed an increase in the porosity at the electrode interfaces, when the electrode had been polarised. No such structural changes were found for electrodes tested without current load. The degradation is primarily ascribed to pore formation in the electrode material induced by an electric field. Kluwer Academic Publishers, 2000 cathodes nationallicence degradation nationallicence durability nationallicence lanthanum strontium manganite nationallicence solid oxide fuel cell nationallicence structure nationallicence Jørgensen M.J. Materials Research Department, Risø National Laboratory, PO Box 49, DK-4000, Roskilde, Denmark aut Holtappels P. Materials Research Department, Risø National Laboratory, PO Box 49, DK-4000, Roskilde, Denmark aut Appel C.C. Materials Research Department, Risø National Laboratory, PO Box 49, DK-4000, Roskilde, Denmark aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/4(2000-04-01), 411-418 0021-891X 30:4<411 2000 30 10800 https://doi.org/10.1023/A:1003987318963 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003987318963 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jørgensen M.J. Materials Research Department, Risø National Laboratory, PO Box 49, DK-4000, Roskilde, Denmark aut NATIONALLICENCE 700 1- Holtappels P. Materials Research Department, Risø National Laboratory, PO Box 49, DK-4000, Roskilde, Denmark aut NATIONALLICENCE 700 1- Appel C.C. Materials Research Department, Risø National Laboratory, PO Box 49, DK-4000, Roskilde, Denmark aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/4(2000-04-01), 411-418 0021-891X 30:4<411 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer