Report of Five-year NEDO Project on Durability/Reliability of SOFC Stacks

被引:20
作者
Yokokawa, Harumi [1 ]
机构
[1] Natl Inst Adv Ind Sci & Technol, Energy Technol Res Inst, Tsukuba, Ibaraki 3058565, Japan
来源
SOLID OXIDE FUEL CELLS 13 (SOFC-XIII) | 2013年 / 57卷 / 01期
关键词
DOPED ZRO2 ELECTROLYTE; NATIONAL PROJECT; DEGRADATION; CONDUCTIVITY; OPERATION; CATHODE; CELLS; STABILITY; SC2O3; ANODE;
D O I
10.1149/05701.0299ecst
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The five-year NEDO project on the durability / reliability of SOFC stacks ended on March 2013. Final results are reported with emphases on correlation between fabrication sequence and degraded parts and on effects of operation conditions such as temperature, overpotential of electrodes etc. NEDO targets on durability and reliability were successfully achieved at the end of project. Summary of detailed analyses on respective degradations found in those SOFC stacks involved is given to clarify common and individual features of degradations. Chemical and electrochemical natures of interactions of electrodes with gaseous impurities are successfully identified, whereas reliability of electrolytes is found to be strongly governed by electrochemical features. Detailed investigations on microstructure and its change revealed several stages for relations between performance degradation and microstructural changes. Reliability of cell assemblies are well treated by a combination of approaches on fundamental mechanical properties, modeling of electrochemical reactions and stress analyses with a focus on the volume change caused by the valence changes in electrolyte, interconnect and electrodes.
引用
收藏
页码:299 / 308
页数:10
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