Triboelectric nanogenerators (TENGs) show exceptional promise for converting wasted mechanical energy into electrical energy. This study investigates the use of laser-induced graphene (LIG) composites as an exciting class of triboelectric materials in TENGs. Infrared laser irradiation is used to convert the surfaces of the two carbon sources, polyimide (PI) and cork, into LIG. This gives the bilayer composite films the high conductivity associated with LIG and the triboelectric properties of the carbon source. A LIG/PI composite is used to fabricate TENGs based on conductor-to-dielectric and metal-free dielectric-to-dielectric device geometries with open-circuit voltages >3.5 kV and peak power >8 mW. Additionally, a single sheet of PI is converted to a metal-free foldable TENG. The LIG is also embedded within a PDMS matrix to form a single-electrode LIG/PDMS composite TENG. This single-electrode TENG is highly flexible and stretchable and was used to generate power from mechanical contact with skin. The LIG composites present a class of triboelectric materials that can be made from naturally occurring and synthetic carbon sources.

中文翻译：

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激光诱导石墨烯摩擦纳米发电机

摩擦电纳米发电机（TENGs）具有将无用的机械能转化为电能的巨大希望。这项研究调查了激光诱导石墨烯（LIG）复合材料作为TENG中令人兴奋的一类摩擦电材料的用途。红外激光辐照用于将聚酰亚胺（PI）和软木塞这两种碳源的表面转换为LIG。这使双层复合膜具有与LIG和碳源的摩擦电特性相关的高电导率。LIG / PI复合材料用于制造TENG，其基于导体到电介质和无金属的电介质到电介质器件的几何形状，开路电压> 3.5 kV，峰值功率> 8 mW。此外，单张PI可以转换为无金属的可折叠TENG。LIG也嵌入在PDMS矩阵内，以形成单电极LIG / PDMS复合材料TENG。这种单电极TENG具有很高的柔韧性和可拉伸性，被用来通过与皮肤的机械接触来产生动力。LIG复合材料提供了一类可由天然和合成碳源制成的摩擦电材料。