Morphology‐Controlled Molybdenum Disulfide/Candle Soot Carbon Composite for High‐Performance Supercapacitor

Abstract

Facile assembly of robust electrodes with excellent electrochemical performances is still challenging yet consequential for supercapacitor applications. Although molybdenum disulfide (MoS 2 ) has versatile properties, restacking of molybdenum layers and poor intrinsic conductivity restrict to explore it for electrochemical applications. Herein to address these challenges, we utilized candle soot derived carbon to fabricate MoS 2 /Carbon (C) nanocomposite through a simple hydrothermal synthesis method. The prepared composite delivered specific capacitance of 452.7 Fg À 1 at a current density of 1 Ag À 1 in 3 M KOH electrolyte and profound capacity retention and coulombic efficiency of 94.8% and 93.7% after 10,000 chargedischarge cycles respectively. Furthermore, we fabricated asymmetric supercapacitor device using MoS 2 /C as the positive electrode and candle soot derived carbon as a negative electrode (MoS 2 /C // C) which showed excellent energy and power density values with an impressive capacitance retention of 100% over 10,000 cycles. The exceptional electrochemical performance of MoS 2 /Carbon composite thus indicates the potential application for high-performance supercapacitor devices.

One-pot hydrothermal synthesis of molybdenum nickel sulfide with graphene quantum dots as a novel conductive additive for enhanced supercapacitive performance

“…3d-e), which can be related to the other compounds. [48][49][50] Importantly, this 3D flower-like morphology of Ni 3 S 2 is reported for the first time, to the best of our knowledge. Fig.…”

“…The superior performance of the MNS-G-2.5 electrode may be related to the availability of a sufficient number of electrolyte ions during rapid charge/discharge processes. 50,61 Furthermore, Fig. S13 (ESI †) shows the preserved 3D flower morphology of the MoNiS-G-2.5 composite after the stability test of 10 000 cycles, as an evidence for achieving high cyclic stability and coulombic efficiency.…”

Rational design of selenium inserted 1T/2H mixed-phase molybdenum disulfide for energy storage and pollutant degradation applications

“…The mixed-phase containing both 1T and 2H phase can effectively overcome the stability issue and restacking problem with enabling more electrons at both edges and basal plane [6]. Various strategies have been investigated to enhance the performance of MoS 2 including morphology control [7], facet engineering [8], metallic and non-metallic modifications like chalcogen insertion [9], defect/vacancy engineering [10], heterostructure construction [11,12], and Photo-Fenton [12] etc.…”

High‐Performance Supercapacitor Electrode Materials of Mo1‐xCoxS2 Nanoparticles Prepared by Hydrothermal Method

“…However, electrochemical performances are hindered due to poor intrinsic conductivity and easy aggregation or restacking of pure MoS 2 , which dramatically limits large-scale applications in industrial production. [6] Therefore, the varieties of modification ways have been developed to surmount the deficiency and further optimize the electrochemical performance of MoS 2 , including ion doping, [7] defect generation, [8] morphological adjustment, [9] noble metal deposition, [10] and hetero-junction construction. [11] Among those, substitutional doping with heteroatoms is of great significance to vary the carrier charge optimize the crystal structure and energy band structure of transition metal chalcogenides by introducing suitable heteroatoms into the layered structure MoS 2 lattice.…”