relation: https://khub.utp.edu.my/scholars/19614/
title: Layered construction of integrated sulfur-bridged CoNi-S/rGO architecture for enhanced electrochemical energy storage
creator: Aboelazm, E.
creator: Seong Khe, C.
creator: Grätz, S.
creator: Feng Chong, K.
creator: Shuaib Mohamed Saheed, M.
creator: Hegazy, M.B.Z.
description: Transition metals chalcogenides (TMCs) have been recognised so far with their high Faradic activity, making them promising candidates for efficient charge transfer electrodes. However, their tendency to aggregate hindered their potential applications in supercapacitors. This study introduces a novel cathode material composed of CoNi-sulfides (CoNi-S) nanostructured flakes and reduced graphene oxide (rGO) sheets designed to be connected through additional sulfur atoms to enhance their conductivity and electroactive surface area for hybrid supercapacitors. Remarkable results were realised by forming a layered structure of CoNi-S/rGO in which rGO sheets wrap CoNi-S flakes. Interestingly, the CoNi-S/rGO composite exhibited a specific capacitance of 3308F g�1 (1654C g�1) at 1 A g�1, outperforming the performance of a single CoNi-S component, which recorded 2155F g�1 (1077.5C g�1) at identical conditions. Both materials demonstrated exceptional high-rate capabilities, retaining about 70  of their capacitance even at an elevated current density of 10 A g�1. In a two-electrode coin cell system, the device showcased a high energy density of 50.2 Wh kg�1 at a power density of 750 W kg�1. It maintained an impressive 84  capacitance retention after enduring 35,000 cycles. These remarkable findings hold significant promise for advanced energy storage applications, marking substantial progress forward in hybrid supercapacitor technology. © 2024 Elsevier B.V.
date: 2024
type: Article
type: PeerReviewed
identifier:   Aboelazm, E. and Seong Khe, C. and Grätz, S. and Feng Chong, K. and Shuaib Mohamed Saheed, M. and Hegazy, M.B.Z.  (2024) Layered construction of integrated sulfur-bridged CoNi-S/rGO architecture for enhanced electrochemical energy storage.  Chemical Engineering Journal, 490.       
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85191404620&doi=10.1016%2fj.cej.2024.151557&partnerID=40&md5=29a2eac19a752c51b15f79dfac7810f1
relation: 10.1016/j.cej.2024.151557
identifier: 10.1016/j.cej.2024.151557