锰系离子筛材料的合成及性能研究

Synthesis and study of properties for manganese oxide ion-sieve

利用离子记忆效应机理以MnO2 和Li2 CO3为原料合成了锂锰氧化物离子筛前驱体 ,研究了温度因素对前驱体产物的影响 ,确定出合适的合成温度为 80 0℃ ;在锂锰氧化物酸浸及Li吸附过程中 ,离子筛材料的结晶构型保持不变 。

Lithium manganese oxide are prepared by sintering the mixture of Li 2CO 3 and MnO 2(Li/Mn mol ratio is 0 5)at various temperatures according to the mechanism of ion memory effect.The results from XRD determinitions suggest that the optimum teperature for LiMn 2O 4 is 800℃.Ion sieve material was obtained by acid treating LiMn2O 4,during the acid delithiation and Li + adsorption,the crystalline structure of the ion sieve material remains unchanged.The experimental results show that the ion-sieve material has a high adsorptive volume for Li +.