High Performance Porous Triboelectric Nanogenerator Based on Silk Fibroin@MXene Composite Aerogel and PDMS Sponge

In this work, we fabricated a high-performance and biocompatibleporous triboelectric nanogenerator (TENG) with friction layers madeby silk fibroin (SF)@MXene composite aerogel (SF@MXene-A) and a PDMSsponge. The incorporation of MXene into the SF aerogel increases thespecific surface area as well as the resulting surface charge density,providing a way for designing a high-performance aerogel TENG. TheTENG with the biocompatible SF aerogel achieves an optimum outputperformance at a ratio of MXene to SF of about 1:1, obtaining a maximumopen-circuit voltage (Voc) of 545 V and maximum short-circuit current(Isc) of 16.13 mu A. The Voc of our SF@MXene-A based TENG is about2-3 times larger than the reported best values of other aerogel-basedTENGs. In addition, owing to the recognized biocompatibility and advantageousair permeability of the SF@MXene-A, we designed a bioporous TENG maskthat diagnoses asthma symptoms. The SF@MXene-A based TENGs have potentialapplications as wearable devices for diagnosing breath-relevant diseases.