MCFC阴极材料在熔融碳酸盐中形变行为

In-situ studies on the deformation of cathodic materials in MCFC

熔融碳酸盐燃料电池在开始运行初期 ,承受一定负荷的多孔镍在转化为多孔氧化镍的过程中往往会受到较严重的形变破坏 ,对电池的使用性能和寿命造成不良影响。采用一套自行设计研制的LVDT位移测试系统 ,对多孔镍和多孔氧化镍在恒载荷下的形变行为进行初步研究 ,实验结果表明 ,加载下的多孔镍在熔融碳酸盐中进行原位氧化、锂化时其形变最为严重 ;而经预先氧化、锂化的多孔镍在相同实验条件下形变相对较小。多孔氧化镍在不同实验条件下的形变总体上均不明显。

A home made LVDT displacement measuring system was set up and applied in in situ deformation experiments.The deformation behaviors of porous NiO and Ni plaques were investigated under the simulating conditions of MCFC operation.The experimental results indicated that the porous nickel deformed most severely when it was in situ oxidized and lithiated under loading.However,under the same condition the deformation of porous nickel was much less when being pre lithiated and oxidized before a load was applied.In contrast,the in situ deformation of the porous nickel oxide was not significant as a whole.