In situ hydrothermal synthesis of nickel cobalt sulfide nanoparticles embedded on nitrogen and sulfur dual doped graphene for a high performance supercapacitor electrode

Abstract

Newly developed in situ hydrothermal synthesis governs morphology of Ni–Co–S embedded on N–S doped graphene thus providing exceptional capacitive behavior.

Deconvolution of capacitive and diffusive charge/lithium storage in lyophilized NiCo2S4–NiCo2O4 composite for supercapattery and lithium-ion battery

“…15 Poompiew et al synthesized nickel cobalt sulfide nanoparticles (NCS) embedded in graphene via a hydrothermal process, which showed a specific energy of 19.35 W h kg À1 and specific power of 235 W kg À1 . 16 There are reports dealing with NCS-NCO composites generated by means of different synthetic routes and used as faradaic electrodes for supercapacitors. 14,15,[17][18][19][20][21][22][23][24][25] Our group recently reported the supercapattery performances of a spinel-type nanostructured Co 3 O 4 material prepared using a sol-gel method, a nickel/nickel oxide/N-doped carbon (Ni/NiO/NC) nanocomposite prepared via pyrolysis and a nickel/nickel ferrite@carbon (Ni/ NiFe 2 O 4 /C) nanocomposite through solution combustion.…”

Multilayered bacterial cellulose/reduced graphene oxide composite films for self-standing and binder-free electrode application

“…To further confirm the electrolyte resistance, the electrochemical impedance spectroscopy (EIS) at open circuit potenal in the frequency range 0.01–100 kHz was carried out [ 34 , 35 ]. The Nyquist plots are shown in Figure 6 .…”

Facile Fabrication of Iron Cobalt Sulfide Nanoparticles within N-Doped Graphene for High-Performance Supercapacitors

“…Figure S2b shows the conductive carbon shells wrapping the crystallized FeCoS 2 core with a clear vision; these results further prove the formation of the core–shell FeCoS 2 /NG composite. This unique structure is derived from the hydroxyl groups of GO and the corresponding metal precursors employed in the preparation process, , which is conducive to reducing the aggregation of FeCoS 2 NPs and boosting the cycling ability during the long-term consecutive cycles. Besides, the NG nanosheet-encapsulated FeCoS 2 NPs interconnect with each other, which can shorten the ion transport pathway between the electrolyte and electrode and enhance the electrochemical performance.…”