TY - GEN
T1 - The group I alkali metals in ionic liquids
T2 - 17th International Symposium on Molten Salts and Ionic Liquids - 218th ECS Meeting
AU - Wibowo, Rahmat
AU - Aldous, L.
AU - Ward Jones, S.
AU - Compton, R. G.
PY - 2010
Y1 - 2010
N2 - Cyclic voltammetric experiments were carried out on Li+, Na +, K+, Rb+ and Cs+ in ionic liquids (ILs). Alloy formation was noted at Pt microelectrodes, but not at Ni. A range of ILs was investigated to identify the best IL to study the M/M+ redox couples, and bulk electrodeposition of all metals was observed in at least one IL, N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([C4mpyrr] [NTf2]). Mathematical simulation of the CVs in this IL was conducted as a function of temperature. The diffusion coefficients, D, of the five metal ions were determined. The formal potential, E f0 (vs. Fc/Fc+) of the five M/M+ couples was quantified, as well as the electrochemical rate constants, k 0, and transfer coefficients, α. The activation energies of diffusion, Ea,dif, of Li+ and Na+ ions, and electron transfer, Ea, of Li/Li+ and Na/Na+ were determined, and ΔS0 (vs. Fc/Fc+) estimated for the Na/Na+ couple. The trends within the group are discussed.
AB - Cyclic voltammetric experiments were carried out on Li+, Na +, K+, Rb+ and Cs+ in ionic liquids (ILs). Alloy formation was noted at Pt microelectrodes, but not at Ni. A range of ILs was investigated to identify the best IL to study the M/M+ redox couples, and bulk electrodeposition of all metals was observed in at least one IL, N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([C4mpyrr] [NTf2]). Mathematical simulation of the CVs in this IL was conducted as a function of temperature. The diffusion coefficients, D, of the five metal ions were determined. The formal potential, E f0 (vs. Fc/Fc+) of the five M/M+ couples was quantified, as well as the electrochemical rate constants, k 0, and transfer coefficients, α. The activation energies of diffusion, Ea,dif, of Li+ and Na+ ions, and electron transfer, Ea, of Li/Li+ and Na/Na+ were determined, and ΔS0 (vs. Fc/Fc+) estimated for the Na/Na+ couple. The trends within the group are discussed.
UR - http://www.scopus.com/inward/record.url?scp=79952670883&partnerID=8YFLogxK
U2 - 10.1149/1.3484810
DO - 10.1149/1.3484810
M3 - Conference contribution
AN - SCOPUS:79952670883
SN - 9781566778268
T3 - ECS Transactions
SP - 523
EP - 535
BT - Molten Salts and Ionic Liquids 17
PB - Electrochemical Society Inc.
Y2 - 10 October 2010 through 15 October 2010
ER -