Flexible carbon cloth based solid-state supercapacitor from hierarchical holothurian-morphological NiCo2O4@NiMoO4/PANI

Based on carbon cloth, flexible solid-state supercapacitors from bimetal oxide arrays of NiCo 2 O 4 @NiMoO 4 deposited by conductive polymers of polyaniline (PANI) are prepared employing a two-step hydrothermal reaction , followed by high-temperature annealing and an in-situ polymerization process. The presence of NiMoO 4 nanoplates prepared on NiCo 2 O 4 nanowhires leads to the hierarchical flower-like nanostructures . In order to further enhance the conductivity and wettability, NiCo 2 O 4 @NiMoO 4 is coated by the three-dimensional networks of PANI nanorods by means of the in-situ polymerization of aniline, the obtained NiCo 2 O 4 @NiMoO 4 /PANI nanocomposites illustrate a specific hierarchical holothurian-like morphology, which facilitates the adsorption and penetration as well as the rapid transportation of electrolyte ions within the nanopores in the active electrode materials , resulting in excellent electrochemical performances. The specific areal capacitance of the flexible carbon cloth-based electrodes reaches 2.38 F cm −2 at current density 1.0 mA cm −2 , and the capacitance retention is 92.36% of the initial value after 5000 cycles, which finds applications in flexible and wearable devices.