Raman Spectroscopy in Lithium-Oxygen Battery Systems

Forrest S. Gittleson; Koffi P.C. Yao; David G. Kwabi; Sayed Youssef Sayed; Won Hee Ryu; Yang Shao-Horn; André D. Taylor

doi:10.1002/celc.201500218

Raman Spectroscopy in Lithium-Oxygen Battery Systems

Forrest S. Gittleson, Koffi P.C. Yao, David G. Kwabi, Sayed Youssef Sayed, Won Hee Ryu, Yang Shao-Horn, André D. Taylor

Chemical and Biomolecular Engineering

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

Abstract

Electrochemical processes in lithium-oxygen (Li-O₂ or Li-air) batteries are complex, with chemistry depending on cycling conditions, electrode materials and electrolytes. In non-aqueous Li-O₂ cells, reversible lithium peroxide (Li₂O₂) and irreversible parasitic products (i.e., LiOH, Li₂CO₃, Li₂O) are common. Superoxide intermediates (O₂^-, LiO₂) contribute to the formation of these species and are transiently stable in their own right. While characterization techniques like XRD, XPS and FTIR have been used to observe many Li-O₂ species, these methods are poorly suited to superoxide detection. Raman spectroscopy, however, may uniquely identify superoxides from O-O vibrations. The ability to fingerprint Li-O₂ products insitu or exsitu, even at very low concentrations, makes Raman an essential tool for the physicochemical characterization of these systems. This review contextualizes the application of Raman spectroscopy and advocates for its wider adoption in the study of Li-O₂ batteries.

Original language	English (US)
Pages (from-to)	1446-1457
Number of pages	12
Journal	ChemElectroChem
Volume	2
Issue number	10
DOIs	https://doi.org/10.1002/celc.201500218
State	Published - Oct 1 2015

Keywords

Li-air batteries
Lithium peroxide
Metal-air batteries
Metal-oxygen batteries
Superoxides

ASJC Scopus subject areas

Catalysis
Electrochemistry

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10.1002/celc.201500218

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title = "Raman Spectroscopy in Lithium-Oxygen Battery Systems",

abstract = "Electrochemical processes in lithium-oxygen (Li-O2 or Li-air) batteries are complex, with chemistry depending on cycling conditions, electrode materials and electrolytes. In non-aqueous Li-O2 cells, reversible lithium peroxide (Li2O2) and irreversible parasitic products (i.e., LiOH, Li2CO3, Li2O) are common. Superoxide intermediates (O2-, LiO2) contribute to the formation of these species and are transiently stable in their own right. While characterization techniques like XRD, XPS and FTIR have been used to observe many Li-O2 species, these methods are poorly suited to superoxide detection. Raman spectroscopy, however, may uniquely identify superoxides from O-O vibrations. The ability to fingerprint Li-O2 products insitu or exsitu, even at very low concentrations, makes Raman an essential tool for the physicochemical characterization of these systems. This review contextualizes the application of Raman spectroscopy and advocates for its wider adoption in the study of Li-O2 batteries.",

keywords = "Li-air batteries, Lithium peroxide, Metal-air batteries, Metal-oxygen batteries, Superoxides",

author = "Gittleson, {Forrest S.} and Yao, {Koffi P.C.} and Kwabi, {David G.} and Sayed, {Sayed Youssef} and Ryu, {Won Hee} and Yang Shao-Horn and Taylor, {Andr{\'e} D.}",

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year = "2015",

month = oct,

day = "1",

doi = "10.1002/celc.201500218",

language = "English (US)",

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T1 - Raman Spectroscopy in Lithium-Oxygen Battery Systems

AU - Gittleson, Forrest S.

AU - Yao, Koffi P.C.

AU - Kwabi, David G.

AU - Sayed, Sayed Youssef

AU - Ryu, Won Hee

AU - Shao-Horn, Yang

AU - Taylor, André D.

PY - 2015/10/1

Y1 - 2015/10/1

N2 - Electrochemical processes in lithium-oxygen (Li-O2 or Li-air) batteries are complex, with chemistry depending on cycling conditions, electrode materials and electrolytes. In non-aqueous Li-O2 cells, reversible lithium peroxide (Li2O2) and irreversible parasitic products (i.e., LiOH, Li2CO3, Li2O) are common. Superoxide intermediates (O2-, LiO2) contribute to the formation of these species and are transiently stable in their own right. While characterization techniques like XRD, XPS and FTIR have been used to observe many Li-O2 species, these methods are poorly suited to superoxide detection. Raman spectroscopy, however, may uniquely identify superoxides from O-O vibrations. The ability to fingerprint Li-O2 products insitu or exsitu, even at very low concentrations, makes Raman an essential tool for the physicochemical characterization of these systems. This review contextualizes the application of Raman spectroscopy and advocates for its wider adoption in the study of Li-O2 batteries.

AB - Electrochemical processes in lithium-oxygen (Li-O2 or Li-air) batteries are complex, with chemistry depending on cycling conditions, electrode materials and electrolytes. In non-aqueous Li-O2 cells, reversible lithium peroxide (Li2O2) and irreversible parasitic products (i.e., LiOH, Li2CO3, Li2O) are common. Superoxide intermediates (O2-, LiO2) contribute to the formation of these species and are transiently stable in their own right. While characterization techniques like XRD, XPS and FTIR have been used to observe many Li-O2 species, these methods are poorly suited to superoxide detection. Raman spectroscopy, however, may uniquely identify superoxides from O-O vibrations. The ability to fingerprint Li-O2 products insitu or exsitu, even at very low concentrations, makes Raman an essential tool for the physicochemical characterization of these systems. This review contextualizes the application of Raman spectroscopy and advocates for its wider adoption in the study of Li-O2 batteries.

KW - Li-air batteries

KW - Lithium peroxide

KW - Metal-air batteries

KW - Metal-oxygen batteries

KW - Superoxides

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Raman Spectroscopy in Lithium-Oxygen Battery Systems

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Keywords

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