| LiNi0.05Mn1.95O4的合成及对Li+的离子交换动力学 |
| Synthesis of LiNi0.05Mn1.95O4 and Its Ion-exchange Kinetics for Li+ |
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| 摘要: 用溶胶-凝胶法合成出尖晶石结构的LiNi0.05Mn1.95O4,用0.5 mol·L-1过硫酸铵对其进行改型,制得锂离子筛LiNiMn-H。LiNiMn-H对Li+的饱和交换容量达5.2 mmol·g-1。用缩核模型(Shrinking-Core Model)处理该离子交换的反应动力学数据得到LiNiMn-H吸附Li+时离子交换反应的控制步骤是颗粒扩散控制(PDC)，同时得到了该实验条件下锂离子筛LiNiMn-H吸附Li+的动力学方程和颗粒扩散系数De。 |
| 关键词: LiNi0.05Mn1.95O4 锂 离子筛 动力学 缩核模型 |
| 基金项目: |
| Abstract: The spinel LiNi0.05Mn1.95O4 was prepared by sol-gel method and the lithium ion-sieve LiNiMn-H was obtained by acid-modifying the available LiNi0.05Mn1.95O4 by 0.5mol·L-1(NH4)2S2O8. The results showed that the saturation capacity of LiNiMn-H for Li+ was 5.2 mmol·g-1 ion-sieve. The kinetics controlled step of LiNiMn-H with Li+ was determined to be particle diffusion control(PDC) by using the shrinking-core model dealing with the dynamics dates of the ion exchange reaction. The different kinetics equations and diffusion coefficients De of LiNiMn-H for Li+ were obtained at the experimental conditions. |
| Keywords: LiNi0.05Mn1.95O4 lithium ion-sieve kinetics shrinking-core model |
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| 董殿权,刘维娜,刘亦凡.LiNi0.05Mn1.95O4的合成及对Li+的离子交换动力学[J].无机化学学报,2009,25(7):1238-1242. |
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