Tuning electrical and thermoelectric properties of freestanding graphene oxide papers by carbon nanotubes and heat treatment

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Okhay, O (Author) Other; Goncalves, G (Author) Other; Dias, C (Author) Other; ventura, j. (Author) FCUP; Vieira, EMF (Author) Other; Goncalves, LMV (Author) Other; Tkach, A (Author) Other

Journal

Title: Journal of Alloys and Compounds

Vol. 781

Pages: 196-200

ISSN: 0925-8388

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 8 Citations

Other information

Authenticus ID: P-00Q-57B

DOI: 10.1016/j.jallcom.2018.12.033

Abstract (EN): Electrical conductivity and Seebeck coefficient of freestanding paper of graphene oxide (GO) and GO reduced by heat treatment at 180 degrees C (rGO) are tuned by addition of carbon nanotubes (CNT). The electrical conductivity of rGO with 50% of CNT is raised to similar to 2940 S/m from similar to 613 S/m for pure rGO or similar to 34 S/m for GO with 50% of CNT without reduction. Moreover, Seebeck coefficient of rGO increases with addition of CNT from -7.04 mu V/K for pure rGO to -20.82 mu V/K for rGO with 50% of CNT, presenting n-type conductivity. As result, calculated power factor PF is enhanced with increasing CNT concentration and the highest PF similar to 1.28 mu W/(K(2)m) is obtained for rGO with 50% of CNT.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5