缓冲溶液法制备SOFC用Ni/YSZ负极材料

材料科学与工艺, 2001, 9(1): 91-94. doi: 10.3969/j.issn.1005-0299.2001.01.022

缓冲溶液法制备SOFC用Ni/YSZ负极材料

李英 ^1, , 唐子龙 ^2, , 谢裕生 ^3, , 张中太 ^4,

1.中国科学院化工冶金研究所,

2.清华大学材料科学与工程系,

3.中国科学院化工冶金研究所,

4.清华大学材料科学与工程系,

基金项目: 王宽诚教育基金国家重点实验室基金中国博士后科学基金

关键词： SOFC , 负极 , Ni/YSZ金属陶瓷 , 缓冲溶液法 , 电导率

Preparation of Ni/YSZ for SOFC anodes by buffer-solution method

固体氧化物燃料电池(SOFC)用负极材料Ni/YSz金属陶瓷的性能与其微观结构密切相关．采用缓冲溶液法制备了三种Ni/YSZ金属陶瓷，并对其相组成、显微结构及电性能进行了表征．分析表明，与机械混合法相比，缓冲溶液法能够使Ni在YSZ基质中分布更均匀．相应地，在整个测试温度区间内(836～1 188℃)，由缓冲溶液法制备的w(Ni)为43％的试样B-43的电导率均远高于由传统的机械混合法制备的同一组成的试样M-43.B-43试样在1 000℃的电导率为709.73 S·cm-1，可望用作SOFC的负极材料．

The properties of Ni/YSZ cermet, which has been used as the anode material for solid-oxide fuelcells ( SOFC), depends strongly on its microstructural features. In this paper, three kinds of Ni/YSZ cermetswere prepared by the buffer-solution method. It was found that the buffer-solution method, compared with themechanical mixing method, can assure more homogeneous distribution of Ni in YSZ substrate. As a result, inthe examined temperature range from 836 ℃to 1 188 ℃, the conductivity of the sample with 43 wt% Ni pre-pared by the buffer-solution method is always much higher than that of the sample with same Ni content pre-pared by the traditional mechanical mixing method. Furthermore, the sample with 43 wt% Ni has a conductivi-ty of 709.73 s · cm- 1 at 1 000 ℃ and is a promising anode material for SOFC.

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