The electrical de conductance (S) and the solid-state diffusion coefficient of the lithium ion (DLi+) were evaluated for a single spherical particle of mesocarbon microbead (MCMB) heat-treated at 1000°C. The measurements were conducted in situ during the electrochemical lithium insertion into the MCMB by using microelectrode-based techniques. The data obtained are discussed as functions of the electrode potential and of the amount of inserted lithium. Both parameters (S and DLi+) were found to depend on the lithium content, and their variation manner changed around 0.6 V vs Li/Li+ at which the inserted lithium amount was ca. 25% of the total insertion. The results would arise from the difference between the first and the second half of the lithium insertion reaction mechanisms.
|Number of pages||3|
|Journal||Journal of Physical Chemistry B|
|Publication status||Published - 1999 Jun 17|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry