<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Nowadays reduced graphene oxide (rGO) is regarded as a highly interesting material which is appropriate for possible applications in electrochemistry, especially in lithium-ion batteries (LIBs). Several methods were proposed for the preparation of rGO-based electrodes, resulting in high-capacity LIBs anodes. However, the mechanism of lithium storage in rGO and related materials is still not well understood. In this work we focused on the proposed mechanism of favorable bonding sites induced by additional functionalities attached to the graphene planes. This mechanism might increase the capacity of electrodes. In order to verify this hypothesis the composite of non-reduced graphene oxide (GO) with multiwalled carbon nanotubes electrodes was fabricated. Electrochemical properties of GO composite anodes were studied in comparison with similarly prepared electrodes based on rGO. This allowed us to estimate the impact of functional groups on the reversible capacity changes. As a result, it was shown that oxygen containing functional groups of GO do not create, in noticeable way, additional active sites for the electrochemical reactions of lithium storage, contrary to what has been postulated previously.</p></abstract>

Nowadays reduced graphene oxide (rGO) is regarded as a highly interesting material which is appropriate for possible applications in electrochemistry, especially in lithium-ion batteries (LIBs). Several methods were proposed for the preparation of rGO-based electrodes, resulting in high-capacity LIBs anodes. However, the mechanism of lithium storage in rGO and related materials is still not well understood. In this work we focused on the proposed mechanism of favorable bonding sites induced by additional functionalities attached to the graphene planes. This mechanism might increase the capacity of electrodes. In order to verify this hypothesis the composite of non-reduced graphene oxide (GO) with multiwalled carbon nanotubes electrodes was fabricated. Electrochemical properties of GO composite anodes were studied in comparison with similarly prepared electrodes based on rGO. This allowed us to estimate the impact of functional groups on the reversible capacity changes. As a result, it was shown that oxygen containing functional groups of GO do not create, in noticeable way, additional active sites for the electrochemical reactions of lithium storage, contrary to what has been postulated previously.

Graphene oxide-multiwalled carbon nanotubes composite as an anode for lithium ion batteries

Poznań Branch, Central Laboratory of Batteries and Cells

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Nowadays reduced graphene oxide (rGO) is regarded as a highly interesting material which is appropriate for possible applications in electrochemistry,...

	Non-reduced	Photothermally reduced
CKα [%]	80.63±0.17	83.53±0.27
NKα [%]	8.3±1.2	5±3
OKα [%]	11.1±0.6	11±1

Graphene oxide-multiwalled carbon nanotubes composite as an anode for lithium ion batteries

Article Category: Research Article

Publicado en línea: 28 sept 2016

Páginas: 481 - 486

Recibido: 27 may 2015

Aceptado: 21 jul 2016

DOI: https://doi.org/10.1515/msp-2016-0093

Palabras clave
graphene oxide, reduced graphene oxide, Li-ion battery, composite anode, porous electrode

© 2016 Łukasz Majchrzycki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Composition of the non- and photothermally reduced electrodes using the WDS.

Graphene oxide-multiwalled carbon nanotubes composite as an anode for lithium ion batteries

Article Category: Research Article

Publicado en línea: 28 sept 2016

Páginas: 481 - 486

Recibido: 27 may 2015

Aceptado: 21 jul 2016

DOI: https://doi.org/10.1515/msp-2016-0093

Palabras clavegraphene oxide, reduced graphene oxide, Li-ion battery, composite anode, porous electrode

© 2016 Łukasz Majchrzycki et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Composition of the non- and photothermally reduced electrodes using the WDS.

Palabras clave
graphene oxide, reduced graphene oxide, Li-ion battery, composite anode, porous electrode