【摘要】 以 L i2 CO3、Mn( NO3) 2 和 M( NO3) 3( M=L a,Nd,Y)为原材料 ,用溶胶 -凝胶方法和微波加热技术合成了纳米级尖晶石 L i Mx Mn2 O4 ( M=L a,Nd,Y)材料 ,XRD实验表明 ,微波合成的材料相纯度较高 ,充放电实验表明 ,在 L i Mn2 O4 中掺杂摩尔比为 0 .0 0 6的 L a、Nd和 Y可以提高其电化学比容量和充放电循环性能 .更多还原

【Abstract】 The doped LiM_xMn₂O₄（M=La,Nd,Y） was synthesized from gel precursor on heating in microwave oven. The precursor was obtained from Li₂CO₃ and Mn（NO₃）₂ in mixture of citric acid and ethandiol. XRD data indicated the higher phase purity of the sample as compared with that obtained in muffle heating. Charge and discharge experiments revealed that doped LiM₀.006Mn₂O₄ have better electrochemical behavior than those undoped ones and obtained from muffle heating. Doping of La, Nd and Y increased the specific discharge capacity and charge/discharge performance of the cells.更多还原