In situ hydrothermal synthesis of nickel cobalt sulfide nanoparticles embedded on nitrogen and sulfur dual doped graphene for a high performance supercapacitor electrode. Issue 40 (19th July 2021)

• Record Type: Journal Article
• Authors: Poompiew, Nutthapong; Pattananuwat, Prasit; Potiyaraj, Pranut
• Is Part Of: RSC advances. Volume 11:Issue 40(2021)
• Page Start: 25057
• Page End: 25067
• Publication Date: 2021-07-19
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra03607f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Newly developed in situ hydrothermal synthesis governs morphology of Ni–Co–S embedded on N–S doped graphene thus providing exceptional capacitive behavior. Abstract : Nickel cobalt sulfide nanoparticles (NCS) embedded onto a nitrogen and sulfur dual doped graphene (NS-G) surface are successfully synthesized via a two-step facile hydrothermal process. The electrical double-layer capacitor of NS-G acts as a supporting host for the growth of pseudocapacitance NCS nanoparticles, thus enhancing the synergistic electrochemical performance. The specific capacitance values of 1420.2 F g −1 at 10 mV s −1 and 630.6 F g −1 at 1 A g −1 are achieved with an impressive capability rate of 76.6% preservation at 10 A g −1 . Furthermore, the integrating NiCo2 S4 nanoparticles embedding onto the NS-G surface also present a surprising improvement in the cycle performance, maintaining 110% retention after 10 000 cycles. Owing to the unique morphology an impressive energy density of 19.35 W h kg −1 at a power density of 235.0 W kg −1 suggests its potential application in high-performance supercapacitors.