Performance enhancement of self-charging system by combining triboelectric nanogenerators and dielectric capacitors

Abstract

As an emerging platform technology, triboelectric nanogenerator (TENG) provides an effective strategy for the realization and widespread deployment of self-powered wireless sensor nodes. However, TENG still faces challenges that necessitate continuous optimization in terms of device structure and output performance. Here, we propose a novel approach to fabricate an all-in-one self-charging system (A-SCS) by integrating a TENG and a dielectric capacitor made from poly(vinylidene fluoride-co-hexafluoropropylene) (P(VDF-HFP)) membrane using the configuration of shared electrodes. The integration capitalizes on the unique characteristics of each component, leading to an enhanced output performance. A 5.5 cm × 5.5 cm sized A-SCS is capable of generating voltages up to 2800 V, with each cycle storing an impressive energy of approximately 3 μJ, which can achieve self-triggered high voltage pulse output through the utilization of discharge tubes. Furthermore, even when miniaturized to a size of 1 cm × 1 cm, the A-SCS exhibits excellent output performance, with a maximum voltage output of 271 V, which is of significant importance for the integration and miniaturization of the A-SCSs. This work not only provides a feasible strategy to develop a new type of high-performance A-SCS, but also presents an excellent application prospect for miniaturized TENGs capable of generating high-voltage pulses.