Kinetics and thermodynamics of the Li/Li+ couple in tetrahydrofuran at low temperatures (195-295 K)

• Published in: Journal of physical organic chemistry 2007-09, Vol.20 (9), p.677-684
• Main Authors: Paddon, Christopher A., Jones, Sarah E. Ward, Bhatti, Farrah L., Donohoe, Timothy J., Compton, Richard G.
• Format: Article
• Language: English
• Subjects: electro deposition; electrochemical rate constant; formal potential; Li/Li+ redox couple; metal nucleation and growth kinetics; tetrahydrofuran
• ISSN: 0894-3230; 1099-1395
• DOI: 10.1002/poc.1230

Kinetic and thermodynamic (formal potential) data relating to the synthetically useful Li/Li+ couple in tetrahydrofuran (THF) solvent at a range of temperatures (196–295 K) are reported. Formal potentials, $E_{\rm f}^{\rm 0} $ have been measured versus the standard reference electrode, ${\rm Fc}\left( {4\,{\rm mM}} \right)/{\rm Fc}^ + {\rm PF}_6^ - \left( {4\,{\rm mM})} \right)$ in THF. At 295 K the following data have been obtained using a mathematical model to simulate the electro‐deposition (metal deposition and growth kinetics) processes of lithium (Li) on a platinum microelectrode; a $E_{\rm f}^0 $ of −3.48 ± 0.005 V, ${\rm d}E_{\rm f}^0 /{\rm d}T$ = −9.2 (±0.5) × 10−4 V K−1, the standard electrochemical rate constant, k0 = 1 (± 0.1) × 10−4 cm s−1, transfer coefficient, α = 0.57 ± 0.03 and diffusion coefficient, D = 8.7 ± 0.1 × 10−6 cm2 s−1. Copyright © 2007 John Wiley & Sons, Ltd. Kinetic and thermodynamic (formal potential) data relating to the synthetically important Li/Li+ couple in tetrahydrofuran (THF) solvent are reported at a range of temperatures (295–196 K).