A study of electrochemical kinetics of lithium ion in organic electrolytes

• DOI: 10.1007/bf02699310
• Publication Date: 2007-09-18T05:09:48Z
• Authors: Shung-Ik Lee; Un-Ho Jung; Yun-Sung Kim; Myung-Hwan Kim; Dong-June Ahn; Hai-Soo Chun
• Keywords: 7. Clean energy; 01 natural sciences; 3. Good health; 0104 chemical sciences

Limiting current densities equivalent to the transport-controlling step of lithium ions in organic electrolytes were measured by using a rotating disk electrode (RDE). The diffusion coefficients of lithium ion in the electrolyte of PC/LiClO4, EC : DEC/LiPF6 and EC : DMC/LiPF6 were determined by the limiting current density data according to the Levich equation. The diffusion coefficients increased in the order of PC/LiClO4<EC : DEC/LiPF6<EC : DMC/ LiPF6 with respect to molar concentration of lithium salt. The maximum value of diffusivity was 1.39x10-5cm2/s for 1M LiPF6 in EC : DMC=1 : 1. Exchange current densities and transfer coefficients of each electrolyte were determined according to the Butler-Volmer equation.