摘要
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La0.8Sr0.2Co0.5Fe0.5O3-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0.72Ω.cm2和0.11Ω.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.
To develop novel cathode materials with high performance for intermediate temperature solid oxide fuel cells（SOFC）,La0.8Sr0.2Co0.5Fe0.5O3-δ（LSCF） nano-powders was synthesized by a polymer-assisted synthesis method using glucose and acrylamide with metal nitrates（La（NO3）3·6H2O,Sr（NO3）3,Co（NO3）3·6H2O,Fe（NO3）3·9H2O） as raw materials under the condition of pH=8~10.Then the as-prepared powders were characterized with XRD,SEM,and TEM.The effect of the ratio of glucose and acrylamide to metal nitrates on the particle size was investigated in detail.The results indicated that the particle size of LSCF decreased with the increasing ratio of glucose and acrylamide to metal nitrates.The polarization resistance is 0.72 Ω·cm2 and 0.11 Ω·cm2 at 700 and 750 ℃,respectively.The research reveals that the method used here is suitable to prepare high performance cathode material for SOFC.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2011年第1期71-75,79,共6页
Materials Science and Technology
基金
国家自然科学基金资助项目(50571038)
武汉市晨光计划资助项目(200750731260)
