Flexible and Freestanding MoS 2 /Graphene Composite for High-Performance Supercapacitors.

Autor: Bongu CS; College of Science and General Studies, Alfaisal University, P.O. Box 50927, Riyadh 11533, Saudi Arabia., Krishnan MR; College of Science and General Studies, Alfaisal University, P.O. Box 50927, Riyadh 11533, Saudi Arabia., Soliman A; College of Science and General Studies, Alfaisal University, P.O. Box 50927, Riyadh 11533, Saudi Arabia., Arsalan M; EXPEC Advanced Research Center, Saudi Aramco, P.O. Box 5000, Dhahran 31311, Saudi Arabia., Alsharaeh EH; College of Science and General Studies, Alfaisal University, P.O. Box 50927, Riyadh 11533, Saudi Arabia.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2023 Sep 29; Vol. 8 (40), pp. 36789-36800. Date of Electronic Publication: 2023 Sep 29 (Print Publication: 2023).
DOI: 10.1021/acsomega.3c03370
Abstrakt: Two-dimensional atomically thick materials such as graphene and layered molybdenum disulfide (MoS 2 ) have been studied as potential energy storage materials because of their high specific surface area, potential redox activity, and mechanical flexibility. However, because of the layered structure restacking and poor electrical conductivity, these materials are unable to attain their full potential. Composite electrodes made of a mixture of graphene and MoS 2 have been shown to partially resolve these issues in the past, although their performance is still limited by inadequate mixing at the nanoscale. Herein, we report three composites via a simple ball-milling method and analyze supercapacitor electrodes. Compared with pristine graphene and MoS 2 , the composites showed high capacitance. The as-obtained MoS 2 @Graphene composite (1:9) possesses a high surface area and uniform dispersion of MoS 2 on the graphene sheet. The MoS 2 @Graphene (1:9) composite electrode has a high specific capacitance of 248 F g -1 at 5 A g -1 in an electrochemical supercapacitor compared with the other two composites. Simultaneously, the flexible symmetric supercapacitor device prepared demonstrated superior flexibility and a long lifespan (93% capacitance retention after 8000 cycles) with no obvious changes in performance under different angles. In portable and wearable energy storage devices, the current experimental results will result in scalable, freestanding hybrid electrodes with improved, flexible, supercapacitive performance.
Competing Interests: The authors declare no competing financial interest.
(© 2023 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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