Journal
CHEMELECTROCHEM
Volume 1, Issue 1, Pages 47-50Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.201300160
Keywords
cell polarization; electrolytes; lithium-oxygen batteries; power sources; salt effects
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Funding
- Italian Institute of Technology
- Regione Lazio, Italy
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant - Korea government Ministry of Trade, Industry, and Energy [20124010203310]
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In this paper we report a comparative study of the electrochemical properties of a lithium-oxygen cell using a tetraethylene glycol dimethyl ether (TEGDME)-based electrolyte solution with four different lithium salts, namely, lithium-bis-(trifluormethanesulfonyl)-imide, LiN(SO2CF3)(2), lithium trifluoromethanesulfonate, LiCF3SO3, lithium perchlorate, LiClO4, and lithium hexafluorophosphate, LiPF6. This study evidences the role of the electrolyte salt in affecting the cell polarization as a reflection of its specific properties in terms of lithium transference number and interface resistance. LiCF3SO3 is finally identified as the best choice for assuring low cell polarization.
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