MOF-808 Enhanced MXene Tribopositive Layer for High-Performance Triboelectric Nanogenerators

Abstract

Smart electronic devices require an energy harvester that is a durable, portable, miniature, and long-lasting power source. As an energy harvester, triboelectric nanogenerator (TENG) is a promising state-of-the-art technology that can provide power on demand. The choice of triboactive materials greatly influences TENG performance, and recently, great attention has been given to composite materials. Herein, it is shown that the MOF-808@MXene/PVDF TENG fabricated from a composite of MOF-808 with MXene produces a synergistic effect, thus generating higher triboelectric output than MOF-808/PVDF TENG and MXene/PVDF TENG, respectively. The optimized MOF-808@MXene/PVDF TENG delivers an output of 296.22 V, 30.7 μA, and 67.4 mW m⁻². The figure-of-merit performance indicates a thirteen times increase in improvement from MOF-808/PVDF TENG and the improvement doubles for MXene/PVDF TENG, respectively. Moreover, all the optimized TENGs are found to be stable for up to 5000 repeated cycles and are also tested toward endurance of up to 10 weeks. The results also depict that among all TENG, the composite MOF-808@MXene/PVDF TENG shows only a 34% reduction in output voltage after 10 weeks of endurance and, therefore, can be used as a durable, long-lasting power source for micro-based circuit device applications.