In situ FTIR spectroscopy study of Li/LiNi0.8Co 0.15Al0.05O2 cells with ionic liquid-based electrolytes in overcharge condition

R. Sharabi; E. Markevich; V. Borgel; G. Salitra; D. Aurbach; Guenter Semrau; Michael A. Schmidt

doi:10.1149/1.3292635

In situ FTIR spectroscopy study of Li/LiNi_0.8Co _0.15Al_0.05O₂ cells with ionic liquid-based electrolytes in overcharge condition

R. Sharabi, E. Markevich, V. Borgel, G. Salitra, D. Aurbach, Guenter Semrau, Michael A. Schmidt

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

We developed a methodology of in situ Fourier transform infrared (FTIR) measurements of gaseous products formed in an electrochemical cell upon polarization. LiNi_0.8Co_0.15Al_0.05O₂ (NCA) cathodes were explored at potentials of up to 5.5 V vs Li in the ionic liquid (IL)-based electrolyte solution, LiTFSI/ N -butyl- N -methylpyrrolidinium bis(trifluoromethanesulfonyl)amide. The polarization of the NCA electrodes formed CO₂ and CO due to the liberation of oxygen and the parallel dissolution of nickel ions, which oxidizes the carbon black in the composite electrode. The oxygen was mostly liberated from the NCA and also due to minor contribution from the surface groups on the carbon black additive.

Original language	English
Pages (from-to)	A32-A35
Journal	Electrochemical and Solid-State Letters
Volume	13
Issue number	4
DOIs	https://doi.org/10.1149/1.3292635
State	Published - 2010

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abstract = "We developed a methodology of in situ Fourier transform infrared (FTIR) measurements of gaseous products formed in an electrochemical cell upon polarization. LiNi0.8Co0.15Al0.05O2 (NCA) cathodes were explored at potentials of up to 5.5 V vs Li in the ionic liquid (IL)-based electrolyte solution, LiTFSI/ N -butyl- N -methylpyrrolidinium bis(trifluoromethanesulfonyl)amide. The polarization of the NCA electrodes formed CO2 and CO due to the liberation of oxygen and the parallel dissolution of nickel ions, which oxidizes the carbon black in the composite electrode. The oxygen was mostly liberated from the NCA and also due to minor contribution from the surface groups on the carbon black additive.",

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T1 - In situ FTIR spectroscopy study of Li/LiNi0.8Co 0.15Al0.05O2 cells with ionic liquid-based electrolytes in overcharge condition

AU - Sharabi, R.

AU - Markevich, E.

AU - Borgel, V.

AU - Salitra, G.

AU - Aurbach, D.

AU - Semrau, Guenter

AU - Schmidt, Michael A.

PY - 2010

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N2 - We developed a methodology of in situ Fourier transform infrared (FTIR) measurements of gaseous products formed in an electrochemical cell upon polarization. LiNi0.8Co0.15Al0.05O2 (NCA) cathodes were explored at potentials of up to 5.5 V vs Li in the ionic liquid (IL)-based electrolyte solution, LiTFSI/ N -butyl- N -methylpyrrolidinium bis(trifluoromethanesulfonyl)amide. The polarization of the NCA electrodes formed CO2 and CO due to the liberation of oxygen and the parallel dissolution of nickel ions, which oxidizes the carbon black in the composite electrode. The oxygen was mostly liberated from the NCA and also due to minor contribution from the surface groups on the carbon black additive.

AB - We developed a methodology of in situ Fourier transform infrared (FTIR) measurements of gaseous products formed in an electrochemical cell upon polarization. LiNi0.8Co0.15Al0.05O2 (NCA) cathodes were explored at potentials of up to 5.5 V vs Li in the ionic liquid (IL)-based electrolyte solution, LiTFSI/ N -butyl- N -methylpyrrolidinium bis(trifluoromethanesulfonyl)amide. The polarization of the NCA electrodes formed CO2 and CO due to the liberation of oxygen and the parallel dissolution of nickel ions, which oxidizes the carbon black in the composite electrode. The oxygen was mostly liberated from the NCA and also due to minor contribution from the surface groups on the carbon black additive.

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In situ FTIR spectroscopy study of Li/LiNi_0.8Co _0.15Al_0.05O₂ cells with ionic liquid-based electrolytes in overcharge condition

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