熔融碳酸盐燃料电池多孔镍阴极的制备及修饰

Preparation and Modification of Porous Nickel Cathode for Molten Carbonate Fuel Cell

以羰基Ni粉为原料,加入造孔剂、增塑剂(PEG)和粘合剂(PVB)等充分混合制成Ni基体阴极素坯。将素坯在一定温度和气氛下烧结获得多孔镍基体阴极。采用XRD及SEM等技术对烧结后的多孔镍基阴极材料的成分及形貌等进行表征分析,筛选了较佳的造孔剂,并优化了烧结工艺,获得具有良好孔结构的多孔镍基体阴极材料。并进一步采用电泳沉积技术(EPD)对所制备的多孔镍基体阴极进行修饰,即在其表面沉积纳米颗粒层,获得的复合阴极材料保持了镍基体阴极的多孔结构且在模拟MCFC启动阶段运行条件下表现出良好的抗形变和抗溶解性能。

This study prepares Ni group cathodal biscuit with carbonyl Ni powder as the raw material and its intensive mixing with pore forming materials, plasticizer（PEG） and adhesive（PVB） ; nodulizes biscuit at certain temperature and atmosphere and obtains porous nickel substrate cathode; conducts characterization analysis on elements and morphology of porous nickel cathode material after sintering with XRD and SEM technologies, selects better pore forming materials; optimizes the sintering process and obtains porous nickel substrate cathode material with a good pore structure; further modifies the prepared porous nickel suhstrate cathode with electrophoretic deposition（EPD） technique, i.e. depositing nanopartiele lay- er on its surface. The composite cathode material obtained maintains the porous structure of nickel substrate cathode and shows a good resistance to deformation and soivation when simulating operating conditions in the initialization phase of MCFC.