| With the development of science and technology,all kinds of portable and wearable electric devices rise in response to the proper time and conditions,such as curved phones,electric skin,smart glasses and smart bracelets.The appearance of these devices makes people’s life more convenient and colorful.However,at the meantime,there is more and more demands for flexible devices.As we all knew,supercapacitor and pressure sensor are two common electron devices in our life,traditional supercapacitor and pressure sensor have rigid structure,which further limits their widespread application.In this paper,based on the development of flexible device,we aimed at the disadvantage of rigid structure for supercapacitor and pressure sensor and chose suitable flexible substrate to synthesize a new-style supercapacitor possessing flexibility and self-healing ability as well as a flexible pressure sensor.The detailed work is shown as follows:1.Supercapacitor has a great importance for the development of new energy.Moreover,with the development of various wearable electric devices and the complex working environment,there is a higher demand for the flexible supercapacitor.So we synthesized a flexible and self-healing all-solid-state supercapacitor with all-in one structure.At first,a physically cross-linked PVA-H2SO4 hydrogel film was prepared by the freezing/thawing method,which has an excellent flexibility,self-healing ability,electrical conductivity ability,tensile property and stability in water.According to the in-situ growing method,we successfully obtained a physically cross-linked PVA-H2SO4 hydrogel film covered by polyaniline and single carbon nanotube.After post processing we obtained the final supercapacitor,which exhibits good flexibility and self-healing ability.After conducting related test for its flexibility and self-healing ability,the supercapacitor can still keep a high level capacitance after many bending times.In addition,the supercapacitor still keeps a good area capacitance,which is nearly 80%of its original capacitance after five times self-healing process.2.Based on the detecting of human sports in real-time by wearable electric devices,we used polyurethane sponges as flexible substrate and designed its structure to increase its sensitivity.MXene,named transition metal carbides or nitrides,has a similar structure with graphene.We used MXene as conducting materials and used cyclic dipping method to obtain a new-style pressure sensor with high sensitivity and wide range of pressure response.The pressure sensor can be attached to human body to detect human sports such as finger bending,phonation and so on.Moreover,the pressure sensor also has a sensitive response for the slight vibration of external environment.At last,we tested the stability of the pressure sensor,after compressing ten thousand times,it still has a good response signal to the same pressure. |
