为开发新型高性能中温固体氧化物燃料电池阴极材料,以La、Sr、Co和Fe的硝酸盐、葡萄糖和丙烯酰胺为原料,在pH=8-10的碱性条件,通过聚合物协助燃烧法制备了La0.8 Sr0.2 Co0.5 Fe0.5 O3-δ(LSCF)钙钛矿相纳米粉体.用XRD、SEM和TEM表征了LSCF粉体的相结构和微观形貌,结果显示,在测试范围内随着有机物用量增大,所得粉体粒径逐渐减小.此粉体制备的阴极具有良好的电化学催化活性,电极在700℃和750℃的极化电阻分别为0.72 Ω·cm2和0.11 Ω·cm2.该方法所制备的纳米颗粒均匀、粉体粒径较小、具有良好的电化学性能,满足固体氧化物燃料电池(SOFC)阴极材料的使用要求.
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