MXene-MolecularChromophoreTriboelectricSystemsforSelf PoweredNoble-GasDischarge

Abstract

Identifying triboelectricmaterial pairs capable of deliveringhighperformanceremainsakeychallengeforadvancing triboelectricnanogenerator(TENG)technologies.Toaddress the challenge, we have investigated a triboelectric pair comprising tribo-negative PDMS/MXene(Ti3C2Tx) with a potent tribo positive material, triphenylamine−phenyl−benzothiazole (TPA Ph-BTZ). In this work, the triboelectric propertiesof TPA-Ph BTZwerefirstsystematicallydeterminedbypairingitwithaseries of standard frictionalmaterials, confirming thatTPA-Ph-BTZ is tribo-positive. Building onour findings, we engineeredPDMS/ MXenecompositefilmswithvaryingMXeneloadingsandcoupled themwithTPA-Ph-BTZtoexplore synergistic charge-generation mechanisms. Comprehensivemeasurements, including electrical output, surface potential, dielectric constant, andwettability, revealedthatMXenereinforcement significantlyenhances thecharge-storageabilityandeffectivecontactbehaviorofPDMS.The TPA-Ph-BTZ-PDMS/MXene(2wt%)TENGdeliveredthehighestelectricaloutputof∼290V,∼100μA,andapowerdensityof 2.77W/m2.Thedevicealsoshowedstableoperationover10,000test cycles, confirming itsmechanical robustness. Further, an optimizedTENGwasusedinpoweringaseries-connected240LEDs.Beyondenergyharvesting, thehigh-voltageoutputof the TPA-Ph-BTZ−PDMS/MXeneTENGis furtherdemonstratedforself-poweredactivationofdischargetubes forneon,establishing anapplicationpathway for triboelectric-drivendischarge electronics. This study establishesTPA-Ph-BTZ−MXene/PDMSas a highlyefficient triboelectricpairing,offeringadesignpathwayformolecular-material-basedTENGs.