Nanosheet-like MoO₃ and conductive PANI electrodeposited on flexible carbon cloth for self-supported solid-state supercapacitor electrode

In this paper, uniformly transition metal oxide (MoO3) nanosheets were electrochemically deposited on flexible carbon cloth (CC), and then conductive polyaniline (PANI) was orderly wrapped around their surface by electrochemical polymerization. The morphology and structure of as-obtained self-supported PANI/MoO3/CC electrode were investigated by FTIR, X-ray diffraction, Raman, scanning electron microscope (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy measurements in detail. Among all PANI/MoO3/CC electrode, the self-supported PMC-3 (deposition time of 300 s) has high specific capacitance of 841.6 F g(-1) at current density of 0.5 A g(-1) in the three-electrode system, having specific capacitance of 595.7 F g(-1) even at 10 A g(-1). Novelty, the as-assembled symmetrical capacitor is flexible and convenient with power density of 199.93 W kg(-1) at the energy density of 9.69 Wh kg(-1) and the energy density of 3.88 Wh kg(-1) at power density of 4000 W kg(-1). Thus, the electrochemical properties of the self-supported PANI/MoO3/CC electrode were significantly improved, and the self-supported electrodes are more competitive than other materials in practical application of clean energy storage systems.