电化学方法制备电极板材料LiAlO_2

向100ml乙醇和1ml乙酰丙酮混合溶液中加入0.18g锂片,控制电流为0.2A电解铝片6h,制得纳米LiAlO2前驱体。将电解液水解、洗涤、干燥后在550℃煅烧2h,制得纳米LiAlO2粉体。产物通过电子透射显微镜(TEM)、X射线衍射(XRD)、拉曼光谱(Raman)进行表征。结果表明,适宜煅烧温度为550℃;煅烧后所得纳米LiAlO2粉体粒径为30nm。MCFC电堆平均每个电池的开路电压达到1.15V左右,电堆电流密度达到187mA·cm-2,输出功率为217.8W;10次再启动,电池性能不降低。

Electrosynthesis of electrode board material LiAlO2

0.18 g Li slice was put into 100 ml ethanol and 1 ml acetyl-acetone solution and then the precursor of nano-LiAlO₂ was synthesized by electrolysis of aluminum for 6 h at the current of 0.2 A in the above.Nano-LiAlO2 was obtained at 550℃ for 2 h after drying and hydrolysis of the precursor.The products were characterized by XRD, TEM and Raman.The results indicate that the precursor should be calcined at 550℃ in order to make the nano-sized LiAlO2 of 30 nm.In molten carbonate fuel cell stack（MCFC）, the average opening circuit voltage of individual cell is about 1.15 V.The density of the electric current reaches 187 mA·cm^-2 .The output power of stack is 217.8 W.The cell was operated for 10 thermal circles without reducing its performance.