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Electrochemical Characterisation of a Lithium-Ion Battery Electrolyte Based on Mixtures of Carbonates With a Ferrocene-Functionalised Imidazolium Electroactive Ionic Liquid

Electrochemical Characterisation of a Lithium-Ion Battery Electrolyte Based on Mixtures of Carbonates With a Ferrocene-Functionalised Imidazolium Electroactive Ionic Liquid

John C Forgie, Soumia El Khakani, Dean D MacNeil, Dominic Rochefort

Phys Chem Chem Phys. 2013 May 28;15(20):7713-21.

PMID: 23595224

Abstract:

Electrolytic solutions of lithium-ion batteries can be modified with additives to improve their stability and safety. Electroactive molecules can be used as such additives to act as an electron (redox) shuttle between the two electrodes to prevent overcharging. The electroactive ionic liquid, 1-ferrocenylmethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide (TFSI), was synthesised and its electrochemical properties were investigated when diluted with ethylene carbonate-diethyl carbonate solvent at various concentrations. Cyclic voltammetry data were gathered to determine the redox potential, diffusion coefficient and heterogeneous rate constants of the electroactive imidazolium TFSI ionic liquid in the carbonate solution. The properties of this molecule as an additive in lithium battery electrolytes were studied in standard coin cells with a metallic Li anode and a Li4Ti5O12 cathode.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP96491-A	Ethylene carbonate solution		96-49-1	Price

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