Non‐modulated synthesis of cobalt‐doped MoS ₂ for improved supercapacitor performance

Abstract

A facile hydrothermal technique was employed to synthesized non-modulated cobalt-doped molybdenum sulfide (MoS 2 ) nanoflowers. The as-prepared materials were coated on commercially available Ni-foam to fabricate electrode materials for supercapacitor applications. The elucidation of the structural information, surface morphology, microstructural properties, as well as surface areas was successfully carried out by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) measurements, respectively. XRD and Raman analysis confirmed the structural changes of the materials, which depict a successful synthesis of cobalt-doped MoS 2 with typical phase change and the redshifted peaks of Raman spectra compared to pristine MoS 2 . The flower-like morphology and agglomerating nanosheets of various nanometer diameters of the microstructural properties of the obtained Co-MoS 2 were established from SEM and TEM images. The surface areas of the CMS 1 and CMS 3 electrode materials were, respectively, calculated to be 18.0607 and 14.5519 mg À2 from BET surface analysis. The electrode materials were electrochemically evaluated for their energy storage performance, the materials exhibit specific capacitances of 164 and 146 Fg À1 at 1 Ag À1 for the working electrodes (CMS 1 and CMS 3 ), respectively. Also, the energy densities of 3.67 and 2.05 Wh/kg with power densities of 3279.97 and 2960.26 W/kg were calculated for both electrode materials, respectively. The results illustrate that the Co-MoS 2 can be suitable for an effective electrode material for prospective supercapacitor applications. NOVELTY STATEMENT• Non-modulated Co-MoS 2 was synthesized via facile hydrothermal techniques.• It was established that any concentration of Cobalt higher than 3 moles might reduce the performance of the nanocomposite.

Synergistic Enhancement of Capacitance of Amorphous CuBHT/MoS2 Hybrids

“…Moreover, as the current density increases to 5 A g –1 , the power density will increase to 3501.9 W kg –1 , while the energy density will decay to 7.0 W h kg –1 . This performance is superior to the supercapacitor equipment constructed by some MoS 2 -based or other electrode materials, for example, a DAC/MoS 2 asymmetric device, 17 W h kg –1 and 200 W kg –1 ; a MoS 2 titanium plate, 11.11 W h kg –1 and 530 W kg –1 ; floral MoS 2 /CNT, 12.46 W h kg –1 and 70 W kg –1 ; cobalt-doped MoS 2 , 3.67 W h kg –1 and 2960.26 W kg –1 ; a MoS 2 -Ti 3 C 2 T x heterostructure, 5.1 W h kg –1 and 298 W kg –1 ; MoSe 2 /MWCNTs, 1.74 W h kg –1 and 1396 W kg –1 ; MoS 2 nanospheres: 5.42 W h kg –1 and 128 W kg –1 ; Ppy hydrogels, 4.13 W h kg –1 and 270 W kg –1 . It manifests that A-CuBHT/MoS 2 hybrid materials perform certain application value as an electrode material of supercapacitors.…”

Flower-like manganese and phosphorus co-doped MoS2with high 1T phase content as a supercapacitor electrode material

“…S4 (ESI†), all three samples possess a type-IV isotherm with an obvious hysteresis loop at high relative pressures, verifying the existence of mesopores. 37 The specific surface area of MnP–MoS 2 , Mn–MoS 2 and MoS 2 is respectively calculated to be 9.57, 7.99, and 7.46 m 2 g −1 . The pore size distribution curves shown in Fig.…”

Phosphorus doped molybdenum disulfide regulated by sodium chloride for advanced supercapacitor electrodes

“…4f, all three samples exhibit a type-IV isotherm with distinct hysteresis loops at high relative pressures, manifesting the existence of mesopores. 37 The specific surface area of SP-MoS 2 , P-MoS 2 and MoS 2 is calculated to be 21.0, 10.7, and 7.3 m 2 g −1 , respectively. The pore size distribution curves of the samples are illustrated in Fig.…”