摘要
采用水系流延(含双层水系流延)技术流延电解质/阳极(阳极功能层),叠压共烧技术制备大规格阳极支撑型半电池,利用丝网印刷技术印刷LSM-YSZ阴极,经烧成后获得单电池,对比研究了阳极功能层对SOFC单电池电性能的影响。采用SEM、电子负载及电化学工作站对单电池结构和电性能进行了表征。研究结果表明,阴极、电解质、阳极功能层和阳极支撑层之间结合紧密,阳极功能层的结构均匀,平均孔径为1.12μm。在单电池中增加阳极功能层,单电池以H_2+3%水蒸气为燃料气,空气为氧化气在750℃的最大功率密度由0.21W/cm^2变为0.31W/cm^2,极化阻抗由0.98Ω·cm^2降至0.69Ω·cm^2,单电池放电100h后衰减率由6.94%降至2.63%,衰减率降低了62.1%。
A large-size anode supported half cell with YSZ electrolyte/anode（anode functional layer） was prepared by aqueous tape casting （including in bilayer aqueous tape casting） and overlying co-fired method. Then, LSM＋YSZ cathode on the half cell was prepared by silk screen printing technique. Finally, the single cell was obtained by sintering. The influence of anode functional layer on electrochemical performance of single cell for SOFC was investigated. The structure and electrochemical performance of single cell was characterized by scanning electron microscope（SEM）, electronic load and electrochemical workstation, respectively. The result showed that, cathode, electrolyte, anode functional layer, anode supported layer of single cell were connected well, the structure of anode functional layer was homogeneous, the average pore size was 1.12 p m. The maximum power density, polarization resistance, decay rate after discharge for 100 h of single cell with anode functional layer using H2＋3%H20 as fuel and air as oxide gas at 750 ℃ varied from 0.21W/cm2 to 0.31W/cm2, 0.98Ω.cm2 to 0.69 Ω.cm2, 6.94% to 2.63%, respectively. The decay rate reduced 62.1%.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2016年第11期12-15,20,共5页
China Ceramics
基金
国家自然科学基金(51262010
51462011)
江西省高等学校科技落地计划项目(KJLD13072)
江西省教育厅科技项目
关键词
阳极功能层
极化阻抗
电性能
长期稳定性
Anode functional layer, Polarization resistance, Electrochemical performance~ Long-term stability
