Increase of anode performance of SOFC by reverse current treatment

D. Klotz, B. Butz, A. Leonide, D. Gerthsen, E. Ivers-Tiffée

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

4 被引用数 (Scopus)

抄録

The electrochemistry in the anode functional layer is still one of the performance limiting factors for the standard planar anode-supported SOFC (ASC). In this contribution we present an effective method for the improvement of anode performance. It is based on a short-time application of a high current density in reverse direction (reverse current treatment, RCT). The measured impedance data sets show a progressive decrease of the overall area specific polarization resistance (ASRpol), when the ASC is exposed to a series of RCT. By the application of an appropriate electrochemical model, the change in ASRpol could be attributed to the electrochemical polarization loss in the anode functional layer (AFL), which was reduced by 40 %. Post-test analysis with FIB/SEM revealed the formation of a nanoscaled and highly porous Ni/YSZ layer between electrolyte (YSZ) and anode (Ni/YSZ). The hereby increased length of the electrochemically active triple phase boundary (TPB) is regarded to be the cause for this distinct improvement.

本文言語英語
ホスト出版物のタイトルIonic and Mixed Conducting Ceramics 7
ページ141-150
ページ数10
11
DOI
出版ステータス出版済み - 2010
外部発表はい
イベントIonic and Mixed Conducting Ceramics 7 - 217th ECS Meeting - Vancouver, BC, カナダ
継続期間: 4 25 20104 30 2010

出版物シリーズ

名前ECS Transactions
番号11
28
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

会議

会議Ionic and Mixed Conducting Ceramics 7 - 217th ECS Meeting
Countryカナダ
CityVancouver, BC
Period4/25/104/30/10

All Science Journal Classification (ASJC) codes

  • Engineering(all)

フィンガープリント 「Increase of anode performance of SOFC by reverse current treatment」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル