Determination of diffusion coefficient of lithium in LiMyMn2-yO4 spinels using potentiostatic intermittent titration technique

作者：Churikov A V; Sycheva V O^*

来源：Russian Journal of Electrochemistry, 2011, 47(9): 1043-1048.

DOI：10.1134/S102319351109014X

• rechargeable lithium-ion battery
• cathodic materials
• diffusion coefficient
• spinel
• potentiostatic method

The potentiostatic intermittent titration technique is used to study lithium transport in the LiM Mn-y(2 - y) O-4 compounds with a spinel structure intended for application as cathodic materials in lithiumion and lithium-polymer batteries. The materials are synthesized using the sol-gel method and the melt-impregnation method. Kinetic and diffusion characteristics of the Li (x) Mn2O4 and Li (x) Mn1.95Cr0.05O4 compounds are determined at 25A degrees C as dependent on lithium content 0 < x < 1. The diffusion coefficient of lithium varies significantly in the range of 10(-10) to 10(-13) cm(2)/s under variation of the electrode composition; the surface resistance depends weakly on the concentration of lithium and is 200-500 Ohm cm(2).

• 出版日期2011-9