Abstract
Physical and electrochemical properties of mixtures of ionic liquids based on saturated ring systemswith carbonate based solvents were investigated. The conductivity and electrochemical stability oftwo series of ionic liquids based on piperidinium and pyrrolidinium cations with tetrafluoroborate andbis(trifluorosulfonylimide) anions were evaluated. The effects of the ionic liquid cation, substituent chainlength of the cation function group, and the anion type on conductivity and electrochemical stability asdetermined by cyclic voltammetry were studied. The conductivity was influenced by the substituentchain length of the ionic liquid cation and the solvent carbonate type, where higher conductivities wereobserved with shorter substituent chains and EC versus PC. The saturated ring ionic liquid-carbonatemixtures may show particular promise for implementation as battery electrolytes due to notable highvoltage stabilities, where stability 5.5 V was maintained in the presence of lithium salt. This study shouldpromote development of future safe, high voltage lithium ion battery systems.
| Original language | English |
|---|---|
| Pages (from-to) | 27-32 |
| Number of pages | 6 |
| Journal | Electrochimica Acta |
| Volume | 109 |
| DOIs | |
| State | Published - 2013 |
Keywords
- Conductivity
- Electrolyte
- High voltage stability
- Ionic liquid
- Lithium battery
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