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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Graphene sheets produced by carbon nanotubes unzipping and their performance as supercapacitor

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Silva, Amanda Araujo [1] ; Pinheiro, Romario Araujo [1] ; Rodrigues, Aline Castilho [2] ; Baldan, Mauricio Ribeiro [1, 2] ; Trava-Airoldi, Vladimir Jesus [1] ; Corat, Evaldo Jose [1]
Total Authors: 6
[1] Natl Inst Space Res, 1758 Astronautas Ave, BR-12227010 Sao Jose Dos Campos, SP - Brazil
[2] Aeronaut Technol Inst, 50 Marechal Eduardo Gomes Sq, BR-12228900 Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Applied Surface Science; v. 446, n. SI, p. 201-208, JUL 15 2018.
Web of Science Citations: 11

Carbon nanotubes (CNTs) are well known by their unique properties, such as high electrical conductivity and chemical stability, which can improve charge transfer, facilitating double layer charging in supercapacitor devices. In this work we report on a simple method to unzip CNTs, producing graphene sheets. The amount of hydrogen atoms in the nanotubes synthesis by micro-wave chemical vapor deposition is a critical parameter for unzipping process. High crystalline quality graphene sheets are obtained by this method because of the sp(2) bonds sensibility to hydrogen ions reactivity. Unzipped CNTs provided higher capacitance values without an increase in pseudocapacitance. The resulting structure presented an increase in double-layer charging, suggesting a material with good electron transfer rate. This new synthesis method is promising for obtainment of graphene sheets from carbon nanotubes. Besides, unzipped carbon nanotubes presented themselves to be a good alternative for supercapacitors electrodes material. (C) 2018 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 12/15857-1 - Scientific studies and innovation application on CVD diamond, DLC and carbon nanostructures obtained by chemical vapor deposition technique
Grantee:Vladimir Jesus Trava-Airoldi
Support type: Research Projects - Thematic Grants
FAPESP's process: 15/02960-7 - Optimization study of large electrochemical active area of nanocomposites VACNT-GO and its application in capacitive deionization
Grantee:Amanda Araujo Silva
Support type: Scholarships in Brazil - Doctorate (Direct)