Preparation And Performance Of Triboelectric Nanogenerators Based On MXene Materials

With the rapid development of social production,it is urgent to develop novel,reliable,green and low-cost mobile power sources.Triboelectric nanogenerators（TENG）,as a new energy harvesting technology,can not only collect the energy of human movement to power small electronic devices,but also collect renewable blue energy such as large-scale wave energy.It has been proved theoretically and experimentally that the output of the TENG depends on the properties of the triboelectric material,especially the microstructure of the material itself and its ability to capture charge.MXene is an emerging family of transition metal nitride,carbide and carbonitride.It has highly electronegative surface chemistry,which enhances the ability of triboelectric materials to gain or lose electrons,and increases the surface charge density of the friction layer,thereby improving the output performance of TENG.Therefore,this paper carried out the TENG study based on MXene materials,and achieved the following achievements:1.A nano hybrid structure is proposed to improve the output performance of TENG.TENG based on Ti₃C₂T_xMXene/CNT/PEDOT was prepared by vacuum assisted filtration method.V_ocwas 250 V and I_scwas 3.5μA.Compared with Ti₃C₂T_xMXene-based TNEG,V_ocand I_scincreased 4.56 times and 6.78 times,respectively.The content of this chapter has solved the deterioration of the charge transport properties of nanomaterials,poor adhesion of the substrate,structural dI_scontinuity and other shortcomings,and expanded its application value.2.A nanohybrid structure is proposed to improve the output performance of TENG.Flexible TENG devices based on Ti₃C₂T_xMXene/CNT/PEDOT were fabricated by vacuum assisted filtration.The V_ocand I_scof the Ti₃C₂T_xMXene/CNT/PEDOT TENG devices are 250 V and 3.5μA respectively.Compared with Ti₃C₂T_xMXene-based TNEG,V_ocand I_scincrease 4.56 times and 6.78 times,respectively.The content of this chapter solves the deterioration of charge transport properties of nanomaterials,poor adhesion of substrate,structural d I_scontinuity and other shortcomings,and broadens the application value of nanomaterials.3.By simple dipping coating method,V₂CT_xMXene/PEDOT/LM/CNT（MPLC）composite material is dipped onto the fabric to prepare a wearable fabric sensor driven by a single electrode TENG,so as to monitor human movement in real time.The results show that the MPLC-TENG possesses excellent electrical properties,with V_ocof 118.5V,I_scof 1.23μA and Q_scof 11.75μC.In terms of personal thermal management,MPLC14 fabrics are also very responsive to temperature changes.At 3V driving voltage,the surface temperature of MPLC14 fabric can be raised to 221℃.In terms of mechanical properties,the tensile strength and elongation at break of MPLC14 fabric were increased to 16.1 MPa and 14.2%,respectively,and maintained recoverability in 2000 bends,indicating that MPLC14 fabric has good durability and long-term stability.