水溶媒を用いた溶融炭酸塩形燃料電池用電解質の開発

摘要

For a molten carbonate fuel cell, the establishment of the manufacturing process technology of the a-LiA102 electrolyte matrix with aqueous solvent has the advantages on the environmental impact and the cost reduction compared to conventional technology with organic solvent. In this study, the behaviors of the a-LiAKX slurry were investigated when the aqueous solvent was used. As a result, it was clarified the best slurry condition was 60% or less of the water concentration in the binder solution when the 3% methyl cellulose solution was used as a binder. Moreover, the porosity and the mean pore size of the elec­trolyte matrix could be controlled 55~65% and 0.2~0.45 urn respectively using this slurry. These are enough properties to apply to the electrolyte matrix. In addition, the operation tests and post test analysis of the MCFC single cell using this electrolyte matrix were studied. It was found that any remarkable dif­ference was not seen between the electrolyte matrix that used an aqueous solvent and a conventional ma­trix that used an organic solvent.%1．緒言溶融炭酸塩形燃料電池（MCFC）は，炭酸リチウム（Li_2CO_3）と炭酸ナトリウム（Na_2CO_3）もしくは炭 酸カリウム（K_2CO_3）を溶融含浸させたリチウムアルミネート（LiA10_2）の電解質保持板，多孔質ニッケルで形成されたアノード，多孔質酸化ニッケルで形成されたカソード，各電極に反応ガスを供給するアノードガス流路室とカソード流路室で構成され，約650cの動作温度で電気エネルギーを発生する。