Abstract
ABSTRACT The triboelectric nanogenerator (TENG) is a recent mechanical energy harvesting technology that has been attracting significant attention. Its working principle involves the combination of triboelectrification and electrostatic induction. The TENG can harvest electrical energy from both solid–solid and liquid–solid contact TENGs. Due to their physical difference, triboelectric materials in the solid–solid TENG need to have high mechanical properties and the surface of the liquid–solid contact TENG should repel water. Therefore, the surface of the TENG must be versatile for applications in both solid–solid and liquid–solid contact environments. In this work, we develop a solid–solid/liquid–solid convertible TENG that has a slippery liquid-infused porous surface (SLIPS) at the top of the electrode. The SLIPS consists of a HDFS coated hierarchical Al(OH)3 structure and fluorocarbon liquid. The convertible TENG developed in this study is capable of harvesting electricity from both solid–solid and liquid–solid contacts due to the high mechanical property of Al(OH)3 and the water-based liquid repelling nature of the SLIPS. When the contact occurs in freestanding mode, electrical output was generated through solid–solid/liquid–solid sliding motions. The convertible TENG can harvest electricity from both solid–solid and liquid–solid contacts; thus, it can be a unified solution for TENG surface fabrication.
Highlights
Owing to the rising demand for portable electronics, an increasing number of studies have focused on harvesting electrical energy from ambient sources, including solar [1–3], thermal [4–6], and salinity difference [7–9]
The triboelectric nanogenerator (TENG), a recently developed mechanical energy harvesting technology, has been attracting significant attention; its working principle is based on the combination of triboelectrification and electrostatic induction [16–19]
We develop a solid–solid/liquid–solid convertible TENG that has a slippery liquid-infused porous surface (SLIPS) at the top of its electrode
Summary
Owing to the rising demand for portable electronics, an increasing number of studies have focused on harvesting electrical energy from ambient sources, including solar [1–3], thermal [4–6], and salinity difference [7–9]. In typical TENGs, the electrode is covered with a polymer material to maximize the surface charge, after which it is placed in contact– separation with a counter-charged triboelectric material to generate electricity [20–23]. This counter-charged triboelectric material can be either solid or liquid depending on the working condition [24– 27]. Both solid–solid and liquid–solid contact TENGs have distinct characteristics due to their different physical phases. A unified TENG surface that is capable of effectively harvesting electrical energy from both solid–solid and liquid–solid contacts is required
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