High Roughness Induced Pearl Necklace‐Like ZIF‐67@PAN Fiber‐Based Triboelectric Nanogenerators for Mechanical Energy Harvesting

Abstract

Technological developments and innovations in the wearable device field have created huge consumer demand. Hence, designing energy harvesting devices are of utmost importance. Of the various types of energy harvesting devices, triboelectric nanogenerators (TENGs) have come to the fore, as it can efficiently harvest electrical energy from mechanical motions. To date, polymers and metals have dominated the triboelectric series, but there is a need to develop novel composite materials and 2D materials to enhance the performance of TENGs. In this study, electrospun polyacrylonitrile nanofibers are prepared and decorated with zeolitic imidazole framework‐67 (ZIF‐67@PAN) to form pearl‐necklace‐like fibers. ZIF‐67@PAN nanofibers are prepared by immersing PAN nanofibers for different hours (1, 5, 10, and 24 h) in ZIF‐67 solution, they provide more roughness, and efficient surface contact area. The immersion of PAN fibers in ZIF solution for longer times increases overall energy harvesting efficiency. Different amounts of MXene are deposited on PVDF; the inclusion of MXene improves the charge transfer properties of TENGs. PAN@ZIF‐67 is used as a positive tribolayer and PVDF@MXene as a negative tribolayer. The optimized TENG device has 305 V, 10.6 µA, and 10.9 W/m2 power and demonstrated promising energy harvesting characteristics and self‐powered sensing efficiency.

La(Fe,Si/Al)13-based materials with exceptional magnetic functionalities: a review

“…In contrast, the application of a magnetic field can effectuate a transformation from a small to a large volume phase, concurrently eliciting giant magnetostriction and MCE [Figure 13]. The capability to manipulate the functionalities of LaFe 13 -based materials through diverse physical fields endows them with the potential to function as smart materials [67][68][69][70] . Moreover, it delves into the roles of the IEM transition, providing valuable insights into magnetic effects.…”

A Simplified Method for the Preparation of Highly Conductive and Flexible Silk Nanofibrils/MXene Membrane

“…Influenced by the concept of sustainable development, more and more researchers are committed to finding new environmentally friendly materials with high performance [1]. Flexible membranes obtained from nanomaterials by vacuum filtration and casting are widely used to prepare functional materials [2,3]. Herein, we set our eyes on nature because, with thousands of years of evolution and natural selection, natural biomaterials have evolved a quantity of impressed functional materials with specific construction, such as spider silk [4], lotus leaves [5], and natural silkworm silk.…”