锂离子筛前驱体正尖晶石结构LiMn₂O₄的合成及其特性研究

锂离子筛前驱体正尖晶石结构LiMn 2 O 4 的合成及其特性研究 Study on Synthesis and Porperties of Normal Spinel Structure LiMn 2 O 4 for Lithium Ion-sieve Precursor 雷家珩 LEI Jia-heng 1 2 first-author 弓巧侠 GONG Qiao-xia 1 2 尚建华 SHANG Jian-hua 1 2 陈永熙 CHEN Yong-xi 1 2 袁启华 YUAN Qi-hua 1 2 武汉理工大学理学院 武汉理工大学理学院 School of Science, Wuhan University of Technology School of Science, Wuhan University of Technology 武汉理工大学理学院,湖北,武汉,430070 武汉理工大学理学院,湖北,武汉,430070 以 L i2 CO3 和 Mn O2 （EMD）为原料 ,用固相反应法合成了 λ- Mn O2 锂离子筛前驱体正尖晶石结构的L i Mn2 O4;通过 TG- DTA、XRD和 SEM分析 ,确定了最佳制备条件 :合成温度为 85 0°C,L i/ Mn的摩尔比为 0 .5 ,保温时间为 2 4h;设计和制作了流态化的离子交换装置 ,用 0 .2 0 mol· L- 1和 0 .5 0 mol· L- 1的盐酸分别对 L i Mn2 O4进行了动态酸浸析 ,并得到了高纯度的 λ- Mn O2 ,同时采用原子吸收光谱 （AAS）测定了交换液中锂的浸出和锰的溶损情况 . The normal spinel-type structure LiMn 2O 4 for lithium ion-sieve precursor was synthesized by a solid-state reaction of Li 2CO 3 and MnO 2（EMD）.The optimum conditions for the synthesis of LiMn 2O 4 , determined by means of TG-DTA?XRD and SEM, were heating the mixtures of Li 2CO 3 and MnO 2（EMD） with Li/Mn molar ratio 0.5 at 850 °C in air for 24 h.The ion-exchange device for dynamic method were designed and made. LiMn 2O 4 was delithiated dynamically using 0.20 mol·L -1 and 0.50 mol·L -1 HCl respectively, furthermore λ-MnO 2 with high purity was prepared. At the same time, the concentrations of the lithium-ion extracted and the manganese-ion dissolved in the exchanged solutions were determined by atomic absorption spectroscopy（AAS）. LiMn2O4的合成 锂离子的提取 离子筛 λ-MnO2 synthesis of LiMn 2O 4 extract of lithium ion ion-sieve λ-MnO 2 O614.711 国家自然科学基金资助项目 （ 5 9972 0 2 7） 2001-06-01 2021-04-01 6