High-performance triboelectric nanogenerators doped with carbon nanomaterials derived from cobalt-nickel bimetallic organic frameworks for harvesting low-frequency mechanical energy

In the 21st century, energy availability has become an urgently needed challenge for the development of portable electronic devices and various sensors. Triboelectric nanogenerators (TENGs) have attracted a lot of attention as a promising green energy source, though further in-depth exploration remains necessary. In this paper, a bimetallic metal-organic framework (MOF)-derived carbon material is introduced into a polyvinylidene fluoride (PVDF) matrix, and the CoNi nanocarbon materials (CoNi-NC)/PVDF composite nanofiber film (CNF) prepared by electrospun improves its electronegativity and charge trapping ability to a great extent. Several aspects of the fiber surface morphology, the formation of polar beta-phase and the improvement of dielectric properties are comprehensively investigated. The performance of the contact-separated TENG obtained by assembling with pole-positive nylon 6 in the triboelectric series is significantly improved. The introduced CoNi-NC is verified to possess the superiority of harvesting low-frequency mechanical energy to power low-power small electronic devices and maintains excellent stability over long periods of operation. Finally, its strong potential in the field of self-powered triggers is explored!