Controlled Incorporation of Ni(OH)_2 Nanoplates Into Flowerlike MoS_2 Nanosheets for Flexible All-Solid-State Supercapacitors

摘要

In this work, self-supporting three-dimensional hierarchical nanostructured MoS_2@Ni(OH)_2 nanocomposites are synthesized via a facile single-mode microwave hydrothermal technique. The fabricated MoS_2@Ni(OH)_2 nanocomposites for supercapacitors in aqueous electrolyte exhibit higher specific capacitance and better cyclic stability than those of MoS_2 and Ni(OH)_2 due to the pronounced synergistic effect between MoS_2 and Ni(OH)_2. Further, the flexible all-solid-state supercapcitor is readily constructed by composing the PVA/KOH gel electrolyte in between two MoS_2@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 MoS_2@Ni(OH)_2 nanocomposites are a promising electrode materials for flexible long-life cycling all-solid-sate supercapacitors.