摘要
用溶胶-凝胶法合成出尖晶石结构的LiNi0.05Mn1.95O4,用0.5mol·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5.2mmol·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。
The spinel LiNi0.05Mn0.95O4 was prepared by sol-gel method and the lithium ion-sieve LiNiMn-H was obtained by acid-modifying the available LiNi0.05Mn0.95O4 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 Do of LiNiMn-H for Li^＋ were obtained at the experimental conditions.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2009年第7期1238-1242,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.29376245)
山东省中青年科学家科研奖励基金(博士基金,No.2008BS09004)
青岛科技大学科研启动基金(No.0022322)资助项目
