| LiNi0.05Mn1.95O4的合成及对Li+的离子交换动力学 |
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| 引用本文： | 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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| 作者姓名： | 董殿权 刘维娜 刘亦凡 |
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| 作者单位： | 青岛科技大学化工学院,青岛,266042 |
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| 基金项目： | 国家自然科学基金，山东省中青年科学家科研奖励基金，青岛科技大学校科研启动基金 |
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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.
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| 关 键 词： | 锂 离子筛 动力学 缩核模型 |
Synthesis of LiNi0.05Mn1.95O4 and Its Ion-exchange Kinetics for Li+ |
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| DONG Dian-Quan,LIU Wei-Na and LIU Yi-Fan. Synthesis of LiNi0.05Mn1.95O4 and Its Ion-exchange Kinetics for Li+[J]. Chinese Journal of Inorganic Chemistry, 2009, 25(7): 1238-1242 |
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| Authors: | DONG Dian-Quan LIU Wei-Na LIU Yi-Fan |
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| Affiliation: | School of Chemical Engineering, Qingdao University of Science & Technology, Qingdao, Shandong 266042,School of Chemical Engineering, Qingdao University of Science & Technology, Qingdao, Shandong 266042 and School of Chemical Engineering, Qingdao University of Science & Technology, Qingdao, Shandong 266042 |
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| 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. |
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| Keywords: | LiNi0.05Mn1.95O4 |
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