Abstract
The corrosion behavior of Al foil as the current collector for lithium-ion batteries is studied by linear-sweep thermammetry. The onset temperature for Al pitting corrosion depends on Li salt that is dissolved in an ionic liquid solvent; lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) < LiPF6 < LiBF 4. With LiBF4, no corrosion current is observed until 110°C. X-ray photoelectron spectroscopy study reveals that this Al surface is covered by Al-F compound (presumably AlF3). Due to the formation of a highly passivating AlF3 layer in this electrolyte, the high voltage LiNi0.5Mn1.5O4 positive electrode coated on Al foil can be successfully cycled at 65°C without electrode failure. © 2010 The Electrochemical Society.
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CITATION STYLE
Mun, J., Yim, T., Choi, C. Y., Ryu, J. H., Kim, Y. G., & Oh, S. M. (2010). Linear-sweep thermammetry study on corrosion behavior of Al current collector in ionic liquid solvent. Electrochemical and Solid-State Letters, 13(8). https://doi.org/10.1149/1.3432256
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