Controlled Incorporation of Ni(OH)₂ Nanoplates Into Flowerlike MoS₂ Nanosheets for Flexible All‐Solid‐State Supercapacitors

Abstract

In this work, self‐supporting three‐dimensional hierarchical nanostructured MoS2@Ni(OH)2 nanocomposites are synthesized via a facile single‐mode microwave hydrothermal technique. The fabricated MoS2@Ni(OH)2 nanocomposites for supercapacitors in aqueous electrolyte exhibit higher specific capacitance and better cyclic stability than those of MoS2 and Ni(OH)2 due to the pronounced synergistic effect between MoS2 and Ni(OH)2. Further, the flexible all‐solid‐state supercapcitor is readily constructed by composing the PVA/KOH gel electrolyte in between two MoS2@Ni(OH)2 electrodes on the flexible PET substrates. The resulting supercapacitors can operate at high rate up to 1000 V/s, have excellent long‐life cycling stability, retaining 94.2% of the initial capacitance after 9000 cycles, and mechanical flexibility during extreme bending, respectively. Thereby, the MoS2@Ni(OH)2 nanocomposites are a promising electrode materials for flexible long‐life cycling all‐solid‐sate supercapacitors.

Oxygen-Incorporated MoS2 Nanosheets with Expanded Interlayers for Hydrogen Evolution Reaction and Pseudocapacitor Applications

“…Figure a displays the CV curve of MoS 2– x O x -39h at different scanning rates from 5 to 100 mV s –1 . A pair of remarkable redox peaks related to the Faradaic redox reactions are observed, which is consistent with the previous reports. , No obvious distortion of the CV curve shape is observed, and the peak current increases linearly with the increment of the scan rate from 5 to 100 mV s –1 , suggesting the good pseudocapacitive behavior. Well-defined discharge voltage plateaus at around 0.2–0.1 V are displayed in the galvanostatic discharge curves (Figure b), which is in accordance with the CV results.…”

Mesoporous Iron Family Element (Fe, Co, Ni) Molybdenum Disulfide/Carbon Nanohybrids for High-Performance Supercapacitors

“…It showed the IR drops of MoS 2 /C, Co x Mo 1– x S 2 /C-1, Co x Mo 1– x S 2 /C-2, and Co x Mo 1– x S 2 /C-3 electrode materials at different current densities. Clearly, Co x Mo 1– x S 2 /C-2 exhibited the lowest IR drops at different current densities, which agreed well with the EIS results. − Meanwhile, the specific capacitance of Co x Mo 1– x S 2 /C-2 electrode materials was larger than those of Fe x Mo 1– x S 2 /C and Ni x Mo 1– x S 2 /C (Figure c and Figures S8 and S9).…”

Inkjet-Printed Ultrathin MoS2-Based Electrodes for Flexible In-Plane Microsupercapacitors

“…The typical peaks of (002), (004), (100), (103), (104), (106), and (110) planes can be clearly observed, indicating the existence of a hexagonal MoS 2 phase (JCPDS no. 37-1492) . The weak peaks at 2θ of around 47 and 66° and the background noise of XRD may be attributed to the instrument and poor crystallinity of MoS 2 during hydrothermal synthesis, and the same phenomenon has been observed in other literature .…”

“…37-1492). 45 The weak peaks at 2θ of around 47 and 66°a nd the background noise of XRD may be attributed to the instrument and poor crystallinity of MoS 2 during hydrothermal synthesis, and the same phenomenon has been observed in other literature. 46 Because of the stacking of S−Mo−S atom layers, the strong diffraction signal at 14.2°corresponding to the (002) plane is observed, revealing a 2D-layered structure of MoS 2 .…”