中文摘要：

在微波场作用下,采用柠檬酸盐法合成了阴极粉体La0.8Sr0.2MnO3（LSM）。用TG-DTA、XRD、TEM、SEM和电化学工作站对产物形成过程、微观结构和电化学性能进行分析和表征。结果表明,LSM溶胶在微波处理后,850℃煅烧能够形成单一的钙钛矿型结构;粉体粒径约为30nm,远小于采用传统烘箱加热方式的200nm,所得粉体电催化活性高,其制得的单电池在800℃时的最大功率密度达到0.82W/cm2,开路电压达1.1V,而采用传统烘箱加热方式所制得单电池的最大功率密度仅为0.71W/cm2。

英文摘要：

Nano-crystalline La0.8Sr0.2MnO3 （LSM） powder was successfully synthesized by the citrate method under microwave operation. The formation process, microstructure and electrochemical behaviors of the samples were characterized by TG-DTA, XRD, TEM, SEM and electrochemical workstation. The results reveal that under microwave operation, single-phase perovskite LSM powder is obtained under microwave operation after calcining at 850 ℃, The prepared powder with a particle size of about 30 nm, which is much smaller than that of powder （200 nm） prepared by the citrate method with traditional heating, has high electrocatalytic activity. At 800 ℃, the maximum power density and OCV of the single cell manufactured with this powder reach 0.82 W/cm2 and 1.1 V, respectively, while the maximum power density of the single cell manufactured with the powder prepared by the citrate method with traditional heating is 0.71W/cm2.