A new A-site-deficient Ti-doped SrCoO3-δ perovskite cathode material for intermediate-temperature solid oxide fuel cells
To lower the operating temperatures of solid oxide fuel cells(SOFCs),A new A-site-deficient Ti-doped SrCoO3-δ(SCT)are synthesized by a modified Pechini method and used as new highly active and stable cathode materials for intermediate-temperature SOFCs.The phase structure and electrical,thermal,and electrochemical properties of the SCT samples are evaluated.A phase transformation of SrCoO3-δ from hexagonal to cubic perovskite structure occurred at room temperature by the substitution of Ti.A lower TEC value of the SCT oxide was observed with increasing the Ti doped content and A-site deficiency.NiO-SDC-supported single cells with various SCT as cathode materials were operated at intermediate temperatures using humidified H2 as fuel and the static air as oxidant,respectively.Significant improved electrochemical performance for the A-site-deficient SCT sample was observed.An open-circuit potential of 0.83 V and the max power density of 745 mW cm-2 were achieved at 650℃.The experimental results indicated that the A-site-deficient Sr0.95Co0.9Ti0.1O3-δ cubic perovskites are promising candidates as cathode materials for IT-SOFCs.
Ling Tong Dong Tian
Anhui Key Laboratory of Low temperature Co-fired Material,Huainan Normal University,Huainan 232001,PR China
国际会议
上海
英文
1-7
2018-12-17（万方平台首次上网日期，不代表论文的发表时间）