Reduced graphene oxide for Li–air batteries: the effect of oxidation time and reduction conditions for graphene oxide

Research output: Contribution to journalJournal article – Annual report year: 2015Researchpeer-review

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Reduced graphene oxide for Li–air batteries : the effect of oxidation time and reduction conditions for graphene oxide. / Storm, Mie Møller; Overgaard, Marc; Younesi, Reza; Reeler, Nini Elisabeth Abildgaard; Vosch, Tom; Nielsen, Ulla Gro; Edström, Kristina; Norby, Poul.

In: Carbon, Vol. 85, 2015, p. 233-244.

Research output: Contribution to journalJournal article – Annual report year: 2015Researchpeer-review

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Storm, Mie Møller ; Overgaard, Marc ; Younesi, Reza ; Reeler, Nini Elisabeth Abildgaard ; Vosch, Tom ; Nielsen, Ulla Gro ; Edström, Kristina ; Norby, Poul. / Reduced graphene oxide for Li–air batteries : the effect of oxidation time and reduction conditions for graphene oxide. In: Carbon. 2015 ; Vol. 85. pp. 233-244.

Bibtex

@article{3fd49a8f4ae74e73aa7b95c003669be3,
title = "Reduced graphene oxide for Li–air batteries: the effect of oxidation time and reduction conditions for graphene oxide",
abstract = "Reduced graphene oxide (rGO) has shown great promise as an air-cathode for Li-air batteries with high capacity. In this article we demonstrate how the oxidation time of graphene oxide (GO) affects the ratio of different functional groups and how trends of these in GO are extended to chemically and thermally reduced GO. We investigate how differences in functional groups and synthesis may affect the performance of Li-O-2 batteries. The oxidation timescale of the GO was varied between 30 min and 3 days before reduction. Powder Xray diffraction, micro-Raman, FE-SEM, BET analysis, and XPS were used to characterize the GO's and rGO's. Selected samples of GO and rGO were analyzed by solid state C-13 MAS NMR. These methods highlighted the difference between the two types of rGO's, and XPS indicated how the chemical trends in GO are extended to rGO. A comparison between XPS and C-13 MAS NMR showed that both techniques can enhance the structural understanding of rGO. Different rGO cathodes were tested in Li-O-2 batteries which revealed a difference in overpotentials and discharge capacities for the different rGO's. We report the highest Li-O-2 battery discharge capacity recorded of approximately 60,000 mAh/gcarbon achieved with a thermally reduced GO cathode. (C) 2015 Elsevier Ltd. All rights reserved.",
author = "Storm, {Mie M{\o}ller} and Marc Overgaard and Reza Younesi and Reeler, {Nini Elisabeth Abildgaard} and Tom Vosch and Nielsen, {Ulla Gro} and Kristina Edstr{\"o}m and Poul Norby",
year = "2015",
doi = "10.1016/j.carbon.2014.12.104",
language = "English",
volume = "85",
pages = "233--244",
journal = "Carbon",
issn = "0008-6223",
publisher = "Pergamon Press",

}

RIS

TY - JOUR

T1 - Reduced graphene oxide for Li–air batteries

T2 - the effect of oxidation time and reduction conditions for graphene oxide

AU - Storm, Mie Møller

AU - Overgaard, Marc

AU - Younesi, Reza

AU - Reeler, Nini Elisabeth Abildgaard

AU - Vosch, Tom

AU - Nielsen, Ulla Gro

AU - Edström, Kristina

AU - Norby, Poul

PY - 2015

Y1 - 2015

N2 - Reduced graphene oxide (rGO) has shown great promise as an air-cathode for Li-air batteries with high capacity. In this article we demonstrate how the oxidation time of graphene oxide (GO) affects the ratio of different functional groups and how trends of these in GO are extended to chemically and thermally reduced GO. We investigate how differences in functional groups and synthesis may affect the performance of Li-O-2 batteries. The oxidation timescale of the GO was varied between 30 min and 3 days before reduction. Powder Xray diffraction, micro-Raman, FE-SEM, BET analysis, and XPS were used to characterize the GO's and rGO's. Selected samples of GO and rGO were analyzed by solid state C-13 MAS NMR. These methods highlighted the difference between the two types of rGO's, and XPS indicated how the chemical trends in GO are extended to rGO. A comparison between XPS and C-13 MAS NMR showed that both techniques can enhance the structural understanding of rGO. Different rGO cathodes were tested in Li-O-2 batteries which revealed a difference in overpotentials and discharge capacities for the different rGO's. We report the highest Li-O-2 battery discharge capacity recorded of approximately 60,000 mAh/gcarbon achieved with a thermally reduced GO cathode. (C) 2015 Elsevier Ltd. All rights reserved.

AB - Reduced graphene oxide (rGO) has shown great promise as an air-cathode for Li-air batteries with high capacity. In this article we demonstrate how the oxidation time of graphene oxide (GO) affects the ratio of different functional groups and how trends of these in GO are extended to chemically and thermally reduced GO. We investigate how differences in functional groups and synthesis may affect the performance of Li-O-2 batteries. The oxidation timescale of the GO was varied between 30 min and 3 days before reduction. Powder Xray diffraction, micro-Raman, FE-SEM, BET analysis, and XPS were used to characterize the GO's and rGO's. Selected samples of GO and rGO were analyzed by solid state C-13 MAS NMR. These methods highlighted the difference between the two types of rGO's, and XPS indicated how the chemical trends in GO are extended to rGO. A comparison between XPS and C-13 MAS NMR showed that both techniques can enhance the structural understanding of rGO. Different rGO cathodes were tested in Li-O-2 batteries which revealed a difference in overpotentials and discharge capacities for the different rGO's. We report the highest Li-O-2 battery discharge capacity recorded of approximately 60,000 mAh/gcarbon achieved with a thermally reduced GO cathode. (C) 2015 Elsevier Ltd. All rights reserved.

U2 - 10.1016/j.carbon.2014.12.104

DO - 10.1016/j.carbon.2014.12.104

M3 - Journal article

VL - 85

SP - 233

EP - 244

JO - Carbon

JF - Carbon

SN - 0008-6223

ER -