A self-integration via dual-active mode structural-SC-TENG energy device for electrochemical energy storage and triboelectric energy harvesting

The structural supercapacitor with triboelectric nanogenerator (structural-SC-TENG) is a remarkable integrated energy device utilized for clean energy storage and harvesting. Here, we demonstrated the structural-SC-TENG device based on a multifunctional storage and harvester using dual-functional MoO3 grown on a carbon cloth electrode (CC) via hydrothermal technique and physiochemical characterization revealed the formation of an orthorhombic phase of MoO3. The FE-SEM morphological analysis confirms that the cubes-like peals were uniformly decorated on the CC surface in an upward and downward direction. The dual-functional MoO3 grown on the CC electrode was used for the construction of the supercapacitor and TENG device which will act as a charge-storing electrode in the supercapacitor and charge-sharing electrode in TENG. The constructed MoO3 SSC provides an excellent device capacitance of 97.86 F g−1, energy density of 40.50 Wh kg−1, and a high-power density of 28,125 W kg−1 with remarkable cyclic life modeled/predicted via time series analysis (TSA) technique. On the other side, the TENG device constructed using MoO3 on CC as the positive electrode (confirmed through KPFM analysis) and PDMS as the negative electrode exhibited a better electrical response with a high voltage and current of 55 V and 0.19 μA and delivered a peak power of 4.17 μW. This type of integrated device is splendid and possibly be used for self-powered sensors, smart IoTs, self-charging power systems, low-power electronics, and various indoor/outdoor environments.