The group I alkali metals in ionic liquids: Electrodeposition and determination of their kinetic and thermodynamic properties

R. Wibowo; Leigh Aldous; S. Ward Jones; R. G. Compton

doi:10.1149/1.3484810

The group I alkali metals in ionic liquids: Electrodeposition and determination of their kinetic and thermodynamic properties

R. Wibowo^*, Leigh Aldous, S. Ward Jones, R. G. Compton

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Conference paper

7 Citations (Scopus)

Abstract

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 _f ⁰ (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, E_a,dif, of Li⁺ and Na⁺ ions, and electron transfer, E_a, 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.

Original language	English
Pages (from-to)	523-535
Number of pages	13
Journal	ECS Transactions
Volume	33
DOIs	https://doi.org/10.1149/1.3484810
Publication status	Published - 2010
Event	17th International Symposium on Molten Salts and Ionic Liquids - 218th ECS Meeting - Las Vegas, NV, United States Duration: 10 Oct 2010 → 15 Oct 2010

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title = "The group I alkali metals in ionic liquids: Electrodeposition and determination of their kinetic and thermodynamic properties",

abstract = "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 f 0 (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.",

author = "R. Wibowo and Leigh Aldous and {Ward Jones}, S. and Compton, {R. G.}",

year = "2010",

doi = "10.1149/1.3484810",

language = "English",

volume = "33",

pages = "523--535",

journal = " ECS Transactions",

issn = "1938-6737",

publisher = "Electrochemical Society",

note = "17th International Symposium on Molten Salts and Ionic Liquids - 218th ECS Meeting ; Conference date: 10-10-2010 Through 15-10-2010",

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TY - JOUR

T1 - The group I alkali metals in ionic liquids

T2 - 17th International Symposium on Molten Salts and Ionic Liquids - 218th ECS Meeting

AU - Wibowo, R.

AU - Aldous, Leigh

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 f 0 (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 f 0 (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.

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U2 - 10.1149/1.3484810

DO - 10.1149/1.3484810

M3 - Conference paper

AN - SCOPUS:79952670883

SN - 1938-6737

VL - 33

SP - 523

EP - 535

JO - ECS Transactions

JF - ECS Transactions

Y2 - 10 October 2010 through 15 October 2010

ER -

The group I alkali metals in ionic liquids: Electrodeposition and determination of their kinetic and thermodynamic properties

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