Determination of Li+ solid diffusion coefficient in LiMn2O4 by CITT

作     者：TANG Xin-cun HUANG Bai-yun HE Yue-hui 

作者机构：School of Chemistry and Chemical Engineering Central South University Changsha 410083 China State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China 

出 版 物：《Journal of Central South University of Technology》 (中南工业大学学报（英文版）)

年 卷 期：2005年第12卷第Z1期

页      面：1-4页

核心收录：

学科分类：0808[工学-电气工程] 0806[工学-冶金工程] 08[工学] 

基　　金：Project (20406024) supported by the National Natural Science Foundation of China project (76600) supported by the Postdoctoral Science Foundation of Central South University 

主　　题：capacity titration technique Li+ solid diffusion coefficient LiMn2O4 

摘      要：The capacity intermittent titration technique (CITT) was developed based on the ratio of potentio-charge capacity to galvano-charge capacity (RPG) method, to continuously determine the solid diffusion coefficient (D) of the intercalary species within insertion-host materials with a small voltage region. The linear equations of D vs the value of ratio of the potentio-charge capacity to the galvano-charge capacity (q) were given. By the CITT technique,the Li+ solid diffusion coefficients within LiMn2 O4 at different voltages were determined. The results show that the values of D varied from 3. 447× 10-9 to 7.60× 10-11 cm2/s in the voltage range of charge from 3.3 to 4.3 V as a function of voltage with W shape.