円筒型マイクロ固体酸化物形燃料電池のイシピーダンス解析 : 第2報,アノード・カソード過電圧分離解析(熱工学,内燃機関,動力など)

• 中島 裕典

  九州大学大学院工学研究院

• 許斐 敏明

  九州大学大学院工学研究院

• 北原 辰巳

  九州大学大学院工学研究院

• 伊賀上 聡

  九州大学大学院工学府

書誌事項

タイトル別名

• Impedance Analysis of the Anode and Cathode Impedances of a Micro Tubular Solid Oxide Fuel Cell : 2nd Report, Separation of the Anode and Cathode Overpotentials(Thermal Engineering)
• 円筒型マイクロ固体酸化物形燃料電池のインピーダンス解析(第2報)アノード・カソード過電圧分離解析
• エントウケイ マイクロ コタイ サン カブツケイ ネンリョウ デンチ ノ インピーダンス カイセキ ダイ2ホウ アノード カソード カデンアツ ブンリ カイセキ

抄録

The present paper addresses a separate overpotential analysis of the anode and cathode of a practical solid oxide fuel cell (SOFC). Electrochemical impedance spectroscopy with two-electrode set-up is used for the analysis of a micro tubular SOFC having anode-supported electrolyte. This cell is composed of an Ni/(ZrO_2)_<0.9>(Y_2O_3)_<0.1> cermet anode, an La_<0.8>Sr_<0.2>Ga_<0.8>Mg_<0.2>O_<2.8> electrolyte, and an La_<0.6>Sr_<0.4>(Co_<0.2>Fe_<0.8>)O_3 cathode. Measurements are carried out for the cell operated at 700℃ with varying flow rate and composition of H_2-N_2 mixture gas fed in the anode. In our previous study, the anode and cathode impedances have been found to appear in low and high frequency regions, respectively. Therein, the Ohmic resistance, and the charge and mass transfer resistances at the anode and cathode were evaluated. In the present study, the Ohmic, activation and concnetration overpotentials are then evaluated by integration of those resistances. The anode and cathode activation overpotentials are found to be separated using the Butler-Volmer equation. Thereby the concentration overpotential of the anode is also found to be separated by subtracting the anode activation overpotential from the anode overpotential, while the cathode concentration overpotential is found to be negligible. The separation of the overpotentials is successfully confirmed by the observation of the variation of the overpotentials in conjunction with the variation of the anode gas flow rate and composition, giving the exchange current densities. The analysis shows that decreases in the anode activation overpotential and concentration overpotential including the Nernst loss imporove the cell performance.

収録刊行物

• 日本機械学会論文集Ｂ編

  日本機械学会論文集Ｂ編 75 (755), 1517-1523, 2009

  一般社団法人 日本機械学会

キーワード

• Solid Oxide Fuel Cell
• Electrochemical Impedance Spectroscopy
• Activation Overpotential
• Concentration Overpotential
• Anode
• Cathode

詳細情報

• CRID: 1390282681239664000
• NII論文ID: 110007339826
• NII書誌ID: AN00187441
• DOI: 10.1299/kikaib.75.755_1517
• ISSN: 18848346
• ISSN: 03875016
• NDL書誌ID: 10388457
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10388457
• Web Site: https://www.jstage.jst.go.jp/article/kikaib1979/75/755/75_KJ00005652825/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可