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.

High capacitive amorphous barium nickel phosphate nanofibers for electrochemical energy storage

“…The working electrodes were fabricated by following a similar procedure reported by other groups previously. 33 Firstly, a mixture of Ba x Ni 3Àx (PO 4 ) 2 nanobers, carbon black, and poly(vinylidene uoride) (PVDF) with mass ratio of 80 : 10 : 10 was dissolved in N-methylpyrrolidinone (NMP) to make a slurry under continuous stirring for 24 h, which was then pasted on a nickel foam (1 Â 1 cm 2 ). Aer drying in a vacuum oven at 110 C for 10 h, the coated nickel foam was pressed into a thin lm under 10 MPa pressure.…”

Programmable Nanocarbon‐Based Architectures for Flexible Supercapacitors

“…[ 12,203 ] The transition metal hydroxide, such as Ni(OH) 2 , Co(OH) 2 and Co-Al hydroxide can be incorporated into the nanocarbon architectures for fl exible SC electrodes. [204][205][206][207][208][209][210][211][212] The common transition metal sulfi des used as pseudocapacitive electrodes are MoS 2 , WS 2 VS 2 and NiCo 2 S 4 . [213][214][215][216][217][218] Furthermore, transition metal sulfi des can also be added into nanocarbon architectures to serve as fl exible SC electrodes.…”

Few-layered MoSe2 nanosheets as an advanced electrode material for supercapacitors

“…Analogous to graphite, TMDCs consists of graphene like layers of MX 2 sheets (where M can be any metal ions of IV, V and VI group transition elements and X is a chalcogen, X may be S, Se and Te) which are stacked together by weak van der Waals force. Later, different morphologies of MoS 2 -, WS 2 -, and their composite-based materials were investigated as supercapacitor electrodes [12][13][14][15][16][17][18][19][20][21][22][23][24][25] . In 2007, a first report on the electrochemical double-layer capacitance measurement of MoS 2 nanowall films was published by Soon and Loh 11 , which opened up the field of TMDC-based electrode materials for supercapacitor applications.…”