MXene exhibits notable piezoelectric properties,making it a promising material for high-performance piezoelectric nanogenerators(PENGs)in next-generation smart wearable devices and bioelectronics.However,current MXene...MXene exhibits notable piezoelectric properties,making it a promising material for high-performance piezoelectric nanogenerators(PENGs)in next-generation smart wearable devices and bioelectronics.However,current MXene-based PENGs face challenges such as insufficient mechanical robustness,low piezoelectric response,and limited long-term functionality.These limitations primarily stem from the small effective area and low strain levels of MXene nanosheets.Here,we constructed a high-entropy TiVCrMoC3Tx MXene composite film by leveraging strong hydrogen bonding interactions between MXene and polyvinyl alcohol(PVA),which was further developed into a self-powered flexible nanogenerator.The resulting device exhibited a significant piezoresponse with output signals of 500 mV and 790 pA under a compressive force of 3.47 N,along with considerable long-term functionality over 1500 cycles.Moreover,a hydrofluoric-free etching approach was employed to synthesize the high-entropy MXene nanosheets,which ensures the safety and biocompatibility for bioelectronics applications.This work highlights the potential of high-entropy MXene for sustainable applications in wearable electronics and energy harvesting.展开更多
基金the Research Grants Council of Hong Kong(GRF no.15303123)Research Grants Council of Hong Kong(PolyU SRFS 2122-5S02)+1 种基金PolyU Projects of the Research Centre for Nanoscience and Nanotechnology(RCNN)and the Photonics Research Institute(PRI)(1-CE0H and 1-CD6X)Open Access funding provided by The Hong Kong Polytechnic University。
文摘MXene exhibits notable piezoelectric properties,making it a promising material for high-performance piezoelectric nanogenerators(PENGs)in next-generation smart wearable devices and bioelectronics.However,current MXene-based PENGs face challenges such as insufficient mechanical robustness,low piezoelectric response,and limited long-term functionality.These limitations primarily stem from the small effective area and low strain levels of MXene nanosheets.Here,we constructed a high-entropy TiVCrMoC3Tx MXene composite film by leveraging strong hydrogen bonding interactions between MXene and polyvinyl alcohol(PVA),which was further developed into a self-powered flexible nanogenerator.The resulting device exhibited a significant piezoresponse with output signals of 500 mV and 790 pA under a compressive force of 3.47 N,along with considerable long-term functionality over 1500 cycles.Moreover,a hydrofluoric-free etching approach was employed to synthesize the high-entropy MXene nanosheets,which ensures the safety and biocompatibility for bioelectronics applications.This work highlights the potential of high-entropy MXene for sustainable applications in wearable electronics and energy harvesting.
