Metal supported tubular solid oxide fuel cells fabricated by suspension plasma spray and suspension high velocity oxy-fuel spray

摘要

Low temperature (LT) metalsupportedsolidoxidefuelcells (SOFCs) have many advantages in comparison to conventional electrode or electrolyte supported type SOFCs. NRC has demonstrated high performance LT metalsupported planar SOFCs fabricated by either wet colloidal spray/sintering or suspension thermal spray. The combination of tubular configuration and metalsupported SOFCs may produce more unique and very attractive advantages such as easy and inexpensive sealing method and materials, high specific and volumetric power density, cost-effective fabrication, enhanced robustness, rapid start up, red-ox cycle tolerance and potential use for a pressurized integrated system. In this paper, thin film solid electrolyte of Sm\u2080.\u2082Ce\u2080.\u2088O\u2081.\u2089\u2080 (SDC) and NiO-SDC composite anode on sintered porous tubularmetal supports were deposited by suspension HVOF spray and suspensionplasmaspray, respectively on sintered porous tubularmetal support. La\u2080.\u2086Sr\u2080.\u2084Co\u2080.\u2082Fe\u2080.\u2088O\u2083\u208b\u3b4 (LSCF) cathode on the SDC electrolyte was formed by wet colloidal spray and subsequent sintering process as the final fabrication step. The detailed investigation of suspension and process-related parameters for suspension thermal spray was performed in order to produce thin and crack-free SDC thin film coatings. The electrochemical performance of single cells was demonstrated.