Reactivity of amide based solutions in lithium-oxygen cells

Daniel Sharon; Daniel Hirsberg; Michal Afri; Arnd Garsuch; Aryeh A. Frimer; Doron Aurbach

doi:10.1021/jp506230v

Reactivity of amide based solutions in lithium-oxygen cells

Daniel Sharon, Daniel Hirsberg, Michal Afri, Arnd Garsuch, Aryeh A. Frimer, Doron Aurbach^*

^*Corresponding author for this work

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

51 Scopus citations

Abstract

The stability of electrolyte solutions during lithium-oxygen cells operation is of great importance and interest. This is because oxides formed during reduction are strong nucleophiles which can initiate solvent decomposition. The highly polar amide based solvents have come to the fore as possible candidates for Li-O₂ applications. They show typical cycling behavior as compared to other solvents; however, their stability toward lithium oxides is shrouded in doubt. The present study has focused on Li-O₂ cells containing electrolyte solutions based on DMA/LiNO₃. We have used various analytical tools, to explore the discharge-charge processes and related side reactions. The data obtained from FTIR, NMR, XPS, and EQCM all support a rational decomposition mechanism. The formation of various side products during the course the first discharge, leads to the conclusion that amide based solvents are not suitable for Li-O₂ applications; however, electrolyte solution decomposition reduces the OER overpotential by forming oxidation mediators.

Original language	English
Pages (from-to)	15207-15213
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	118
Issue number	28
DOIs	https://doi.org/10.1021/jp506230v
State	Published - 17 Jul 2014
Externally published	Yes

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title = "Reactivity of amide based solutions in lithium-oxygen cells",

abstract = "The stability of electrolyte solutions during lithium-oxygen cells operation is of great importance and interest. This is because oxides formed during reduction are strong nucleophiles which can initiate solvent decomposition. The highly polar amide based solvents have come to the fore as possible candidates for Li-O2 applications. They show typical cycling behavior as compared to other solvents; however, their stability toward lithium oxides is shrouded in doubt. The present study has focused on Li-O2 cells containing electrolyte solutions based on DMA/LiNO3. We have used various analytical tools, to explore the discharge-charge processes and related side reactions. The data obtained from FTIR, NMR, XPS, and EQCM all support a rational decomposition mechanism. The formation of various side products during the course the first discharge, leads to the conclusion that amide based solvents are not suitable for Li-O2 applications; however, electrolyte solution decomposition reduces the OER overpotential by forming oxidation mediators.",

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AU - Sharon, Daniel

AU - Hirsberg, Daniel

AU - Afri, Michal

AU - Garsuch, Arnd

AU - Frimer, Aryeh A.

AU - Aurbach, Doron

PY - 2014/7/17

Y1 - 2014/7/17

N2 - The stability of electrolyte solutions during lithium-oxygen cells operation is of great importance and interest. This is because oxides formed during reduction are strong nucleophiles which can initiate solvent decomposition. The highly polar amide based solvents have come to the fore as possible candidates for Li-O2 applications. They show typical cycling behavior as compared to other solvents; however, their stability toward lithium oxides is shrouded in doubt. The present study has focused on Li-O2 cells containing electrolyte solutions based on DMA/LiNO3. We have used various analytical tools, to explore the discharge-charge processes and related side reactions. The data obtained from FTIR, NMR, XPS, and EQCM all support a rational decomposition mechanism. The formation of various side products during the course the first discharge, leads to the conclusion that amide based solvents are not suitable for Li-O2 applications; however, electrolyte solution decomposition reduces the OER overpotential by forming oxidation mediators.

AB - The stability of electrolyte solutions during lithium-oxygen cells operation is of great importance and interest. This is because oxides formed during reduction are strong nucleophiles which can initiate solvent decomposition. The highly polar amide based solvents have come to the fore as possible candidates for Li-O2 applications. They show typical cycling behavior as compared to other solvents; however, their stability toward lithium oxides is shrouded in doubt. The present study has focused on Li-O2 cells containing electrolyte solutions based on DMA/LiNO3. We have used various analytical tools, to explore the discharge-charge processes and related side reactions. The data obtained from FTIR, NMR, XPS, and EQCM all support a rational decomposition mechanism. The formation of various side products during the course the first discharge, leads to the conclusion that amide based solvents are not suitable for Li-O2 applications; however, electrolyte solution decomposition reduces the OER overpotential by forming oxidation mediators.

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Reactivity of amide based solutions in lithium-oxygen cells

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