In Situ Analysis of the Li-O2 Battery with Thermally Reduced Graphene Oxide Cathode: Influence of Water Addition

Mie Møller Storm, Mathias Kjærgård Christensen, Reza Younesi, Poul Norby

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The Li-O2 battery technology holds the promise to deliver a battery with significantly increased specific energy compared to today's Li-ion batteries. As a cathode support material, reduced graphene oxide has received increasing attention in the Li-O2 battery community due to the possibility of increased discharge capacity, increased battery cyclability, and decreased, charging, overpotential. In this. article we investigate the effect of water on a thermally, redircedigraphene, oxide cathode in a Li-O2 battery. Differential electrochemical mass spectrciscnieveals a, decreased electron count for batteries with 1000 ppm water added- to the electrolyte in comparison to dry batteries, indicating additional parasitic electrochemical or chemical processes. A comparable capacity of the wet and dry batteries indicates that the reaction mechanism in the Li-O2 battery also depends on the 'surface-of-the cathode and not only on addition of water to the electrolyte as demonstrated by the solution-based mechanism In situ synchrotron X-ray diffraction experiment using a new design of a capillary-based Li-O2 cell with a thermally reduced graphene oxide cathode shows formation of LiOH along with Li2O2.
Original languageEnglish
JournalJournal of Physical Chemistry C
Volume120
Issue number38
Pages (from-to)21211-21217
Number of pages7
ISSN1932-7447
DOIs
Publication statusPublished - 2016

Cite this

@article{a7394c6887b149eaacb8ca1f5b923284,
title = "In Situ Analysis of the Li-O2 Battery with Thermally Reduced Graphene Oxide Cathode: Influence of Water Addition",
abstract = "The Li-O2 battery technology holds the promise to deliver a battery with significantly increased specific energy compared to today's Li-ion batteries. As a cathode support material, reduced graphene oxide has received increasing attention in the Li-O2 battery community due to the possibility of increased discharge capacity, increased battery cyclability, and decreased, charging, overpotential. In this. article we investigate the effect of water on a thermally, redircedigraphene, oxide cathode in a Li-O2 battery. Differential electrochemical mass spectrciscnieveals a, decreased electron count for batteries with 1000 ppm water added- to the electrolyte in comparison to dry batteries, indicating additional parasitic electrochemical or chemical processes. A comparable capacity of the wet and dry batteries indicates that the reaction mechanism in the Li-O2 battery also depends on the 'surface-of-the cathode and not only on addition of water to the electrolyte as demonstrated by the solution-based mechanism In situ synchrotron X-ray diffraction experiment using a new design of a capillary-based Li-O2 cell with a thermally reduced graphene oxide cathode shows formation of LiOH along with Li2O2.",
author = "Storm, {Mie M{\o}ller} and Christensen, {Mathias Kj{\ae}rg{\aa}rd} and Reza Younesi and Poul Norby",
year = "2016",
doi = "10.1021/acs.jpcc.6b06018",
language = "English",
volume = "120",
pages = "21211--21217",
journal = "The Journal of Physical Chemistry Part C",
issn = "1932-7447",
publisher = "American Chemical Society",
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In Situ Analysis of the Li-O2 Battery with Thermally Reduced Graphene Oxide Cathode: Influence of Water Addition. / Storm, Mie Møller; Christensen, Mathias Kjærgård; Younesi, Reza; Norby, Poul.

In: Journal of Physical Chemistry C, Vol. 120, No. 38, 2016, p. 21211-21217.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - In Situ Analysis of the Li-O2 Battery with Thermally Reduced Graphene Oxide Cathode: Influence of Water Addition

AU - Storm, Mie Møller

AU - Christensen, Mathias Kjærgård

AU - Younesi, Reza

AU - Norby, Poul

PY - 2016

Y1 - 2016

N2 - The Li-O2 battery technology holds the promise to deliver a battery with significantly increased specific energy compared to today's Li-ion batteries. As a cathode support material, reduced graphene oxide has received increasing attention in the Li-O2 battery community due to the possibility of increased discharge capacity, increased battery cyclability, and decreased, charging, overpotential. In this. article we investigate the effect of water on a thermally, redircedigraphene, oxide cathode in a Li-O2 battery. Differential electrochemical mass spectrciscnieveals a, decreased electron count for batteries with 1000 ppm water added- to the electrolyte in comparison to dry batteries, indicating additional parasitic electrochemical or chemical processes. A comparable capacity of the wet and dry batteries indicates that the reaction mechanism in the Li-O2 battery also depends on the 'surface-of-the cathode and not only on addition of water to the electrolyte as demonstrated by the solution-based mechanism In situ synchrotron X-ray diffraction experiment using a new design of a capillary-based Li-O2 cell with a thermally reduced graphene oxide cathode shows formation of LiOH along with Li2O2.

AB - The Li-O2 battery technology holds the promise to deliver a battery with significantly increased specific energy compared to today's Li-ion batteries. As a cathode support material, reduced graphene oxide has received increasing attention in the Li-O2 battery community due to the possibility of increased discharge capacity, increased battery cyclability, and decreased, charging, overpotential. In this. article we investigate the effect of water on a thermally, redircedigraphene, oxide cathode in a Li-O2 battery. Differential electrochemical mass spectrciscnieveals a, decreased electron count for batteries with 1000 ppm water added- to the electrolyte in comparison to dry batteries, indicating additional parasitic electrochemical or chemical processes. A comparable capacity of the wet and dry batteries indicates that the reaction mechanism in the Li-O2 battery also depends on the 'surface-of-the cathode and not only on addition of water to the electrolyte as demonstrated by the solution-based mechanism In situ synchrotron X-ray diffraction experiment using a new design of a capillary-based Li-O2 cell with a thermally reduced graphene oxide cathode shows formation of LiOH along with Li2O2.

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