Ultraflexible,highly efficient electromagnetic interference shielding,and self-healable triboelectric nanogenerator based on Ti_(3)C_(2)T_(x) MXene for self-powered wearable electronics

Integrating smart functions into one flexible electronic is vastly valuable in improving their working performances and broadening applications.Here,this work reports a ultraflexible,highly efficient electromagnetic interference(EMI)shielding,and self-healable triboelectric nanogenerator(TENG)that is assembled by modified Ti_(3)C_(2)T_(x) MXene(m-MXene)-based nanocomposite elastomers.Benefitting from the excellent electronegativity of m-MXene,the single-electrode mode-based TENG can generate high open-circuit voltage(V_(oc))oscillating between-65 and 245 V,high short-circuit current(I_(sc))of 29 μA,and an instantaneously maximum peak power density of 1150 mW m^(-2) that can power twenty light-emitting diodes(LEDs).Moreover,the resultant TENG possesses outstanding EMI shielding performance with the maximum shielding effectiveness of 48.1 dB in the X-band.The enhanced shielding capability is dominated by the electromagnetic absorption owning to high conduction loss in m-MXene network,multiple reflections between m-MXene sheets,and polarization effect on the surface of m-MXene sheets.Additionally,a self-powered wearable sensor is fabricated based on the as-prepared TENG.The sensor shows an intrinsic healing ability with healing efficiency of 98.2% and can accurately detect the human large-scale motions and delicate physical signal.This work provides an enhanced way to fabricate the wearable electronics integrated with smart functions,and the reported MXene-based TENG may have a broad prospect in the fields of aerospace,artificial intelligence,and healthcare systems.