All-Silicone Rubber Triboelectric Nanogenerators with Graphite-Impregnated Electrodes
Iuri Custodio Montes Candido, Giovanni da S. Oliveira, Ravi Moreno Araújo Pinheiro Lima, Joaquim Júnior Isídio de Lima, Helinando Pequeno de Oliveira
Abstract
Metal-free triboelectric nanogenerators (TENGs) with properties of comfort, mechanical resistance, and low cost of preparation have been explored as alternative and advantageous systems for incorporation in wearables and sensors. Herein, the production of an all-silicone rubber TENG that explores the percolation threshold of graphite flakes to create accessible current pathways into the membrane, acting as an adequate electrode with high conductivity, and adequate surface modification to provide a high charge transfer rate from a single electrode TENG that explores the human skin as a tribopositive layer are proposed. The proposed all-silicone rubber TENG presented an outstanding performance of 308.7 V for output voltage and power density of 197.2 μW/cm 2 for samples prepared with a silicone rubber layer applied as a tribolayer and modified electrode.