Physicochemical properties of ceramic tape involving Ca0.05 Ba0.95 Ce0.9Y0.1O3 as an electrolyte designed for electrolyte-supported solid oxide fuel cells (IT-SOFCs)
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A proton-conducting membrane involving modified barium cerate BaCe0.9Y0.1O3 was obtained in the form of gas-tight ceramic tape. Monophase Ca0.05Ba0.95Ce0.9Y0.1O3 (5CBCY) powder and an organic medium consisting of polyvinyl butyral used as a binder, a plasticiser based on carboxylic acid esters, and a mixture of ethanol and methyl ethyl ketone were used to prepare slurry for the tape-casting process. Gas-tight ceramic tapes involving 5CBCY and sintered samples were tested as electrolytes in hydrogen–oxygen button solid oxide fuel cells within the temperature range 500–750 °C. Variations in OCV and ohmic resistance (Rs) were determined within this range. A considerable decrease in Rs value was recorded for 5CBCY tape compared to 5CBCY sintered samples. A series of symmetrical cells with 5CBCY electrolytes was analysed. The lowest ASR values for the investigated cells were found for a newly elaborated LSCF–5CBCY cathode as well as for a Ni–5CBCY anode. These electrode materials appear to be suitable for 5CBCY-electrolyte-supported solid oxide fuel cells.
KeywordsSolid oxide fuel cells Ceramic tape Ceramic proton conductor BaCe0.9Y0.1O3
The paper was completed under a contract with the AGH University of Science and Technology, Cracow, Poland (No. 188.8.131.525). Some measurements were performed using scientific equipment belonging to the laboratories of the AGH-UST Energy Centre, Cracow, Poland.
- 10.Dudek M, Lis B, Rapacz-Kmita A, Gajek M, Raźniak A. Some observation on the synthesis and electrolytic properties of (Ba1−xCax)(M0.9Y0.1)O3 M = Ce, Zr based samples modified with calcium. Mater Sci Poland. 2016;34:101–14.Google Scholar
- 24.Ii H, Choi S, Yoon KC, Son H, Kim BK, Lee H, Lee J. Influence of wet atmosphere on electrical and transport properties of lanthanum strontium cobalt ferrite cathode materials for protonic ceramic fuel cells. Solid State Ionics. 2013;249:249–50.Google Scholar
- 25.Raźniak A, Tomczyk P. Application of microelectrodes for investigation of the oxygen electrode reaction in selected electrolytes. Mater Sci Poland. 2008;26:195–206.Google Scholar
- 32.Ding Y, Li Y, Huang W. The role of Ba concentration on the structural characteristics and electrical conductivities of BaxCe0.9Y0.1O3−α. Mater Res Bull. 2017;205:122–8.Google Scholar