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AuthorManal, Alsalama
AuthorHamoudi, Hicham
AuthorYoussef, Khaled M.
Available date2022-05-11T05:29:39Z
Publication Date2021-08-15
Publication NameJournal of Alloys and Compounds
Identifierhttp://dx.doi.org/10.1016/j.jallcom.2021.159584
CitationAlsalama, M., Hamoudi, H., & Youssef, K. M. (2021). The effect of graphene structural integrity on the power factor of tin selenide nanocomposite. Journal of Alloys and Compounds, 872, 159584.
ISSN09258388
URIhttps://www.sciencedirect.com/science/article/pii/S0925838821009932
URIhttp://hdl.handle.net/10576/30814
AbstractTin selenide graphene nanocomposites (SnSe/GNPs) were fabricated with high-energy ball milling and hot pressing by varying the milling time of graphene. The effect of ball milling time on the graphene integrity and the dispersion homogeneity was investigated and the consequential variation in electrical properties of SnSe/GNPs were analyzed. The evolution of graphene sheets during milling as well as the crystal structure of SnSe/GNPs nanocomposites were systematically studied by X-ray diffraction, Raman analysis, scanning electron microscopy, and transmission electron microscopy. It has been proven that graphene was able to keep its crystallinity at short milling times, but it exhibits agglomeration and poor dispersion within the matrix. However, long milling time has a significant effect on increasing the disorders on graphene structure while it provides well dispersion of graphene. The calculated power factor increases with the addition of graphene and with increasing graphene milling time. The increased power factor is attributed to the homogeneous distribution of graphene, which results in a significant increase in electrical conductivity. At 773 K, the lowest power factor value was reported for the 1-min graphene-milled sample, whereas a 40% enhancement was reported for the 2-h graphene-milled sample. Across a wide temperature range (298–720 K), the 12-h graphene-milled sample shows the best performance owing to the simultaneous increase of electrical conductivity and Seebeck coefficient. These findings indicate the positive effect of milling time on the distribution of graphene, which in turn enables graphene to form a continuous net for carriers to move. This study could provide a greater understanding of the control factors of the mechanical milling process for preparing SnSe/GNPs nanocomposites in order to take full advantage of graphene’s extraordinary properties by improving its distribution within the tin-selenide- based composite.
SponsorThis work was made possible by the Qatar Research Leadership program (QRLP) which is under Qatar National Research Fund (QNRF) (a member of the Qatar Foundation) under Grant no. QRLP9-G-3330017, and is supported by the NPRP under Grant no. NPRP10-0206-170366. Open Access funding provided by the Qatar National Library. The statements made herein are solely the responsibility of the authors. The authors would like to acknowledge the the technical assistance provided by Dr. Atif Zekri, Dr. Ayman Samara and Mr. Omar Alhassan at the Imaging and Characterization CORE Labs-Hamad Bin Khalifa University and technical support provided by the Central Laboratory Unit (CLU) and the Center of Advanced Materials (CAM) at Qatar University.
Languageen
PublisherElsevier
SubjectThermoelectric materials
Milling time
Tin selenide, Graphene
Composites
Power factor
TitleThe effect of graphene structural integrity on the power factor of tin selenide nanocomposite
TypeArticle
Volume Number872
Open Access user License http://creativecommons.org/licenses/by/4.0/
dc.accessType Open Access


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