两步法合成MCFC复合阴极及其性能研究

基于前期研究,采用电泳沉积技术将摩尔比为1∶1的LiCoO2和LiFeO2两种纳米颗粒同时修饰至制得的抗形变/溶解复合材料Ⅰ表面（镍阴极材料内通过机械混合法掺杂质量分数2%、4%、6%Co3O4纳米颗粒）制成复合基体阴极Ⅱ。采用扫描电镜对制得的复合基体Ⅱ进行表面形貌分析,筛选出形貌较好的复合基体阴极Ⅱ及其电泳沉积条件。在模拟MCFC运行条件下,复合工作阴极Ⅱ具有良好的热稳定性和电活性,其中掺杂比为4%的复合工作阴极Ⅱ在100h溶解实验测试中溶出的镍离子浓度几乎为0。

Two-step Synthesis of Composite Cathodes of MCFC and Study on Its Performance

Based on previous studies,composite matrix cathode Ⅱ was prepared with the surface of anti-deformation and anti-dissolution composite materialⅠ（blending 2%,4%,6% Co3O4 nano particles in nickel cathode materials through mechanical mixing）through modifying LiCoO2 and LiFeO2 nano particles with 1∶1 molar ratio by use of electrophoretic deposition technique.SEM was used to analyze surface morphology of composite matrix II so as to screen out composite matrix cathodeⅡwith good morphology and electrophoretic deposition conditions.Under the condition of simulated MCFC operation,composite working cathodeⅡ showed good heat stability and electroactivity.Nickel ion concentration of composite working cathode Ⅱ with 4%blending ratio was almost 0in 100hdissolution experiment.