| The rapid development of modern industrial industries has brought about problems such as huge energy consumption and serious environmental pollution,which makes the development and promotion of renewable energy sources urgent.Supercapacitors have attracted much attention in energy storage due to their extremely high power density and ability to charge and discharge quickly.Based on the concept of multi-functional material structure,through the comprehensive integration of structure and function,a material/structure with integrated structure-energy storage function is constructed,which is indicated for the lightening and miniaturization of space vehicles,automobiles and other vehicles A new path.Based on the idea of structure-function integrated composite materials,this paper designs and prepares a structure-storage integrated supercapacitor with carbon fiber as the structural electrode and epoxy resin as the structural polymer electrolyte.In view of the two main reasons that affect the comprehensive performance of solid supercapacitors:electrodes and electrolytes,research was conducted,and the electrochemical and mechanical properties of carbon fibers modified on the surface and new epoxy resin-based polymer electrolytes were investigated.Application potential of structure-energy storage functional materials.The main work of this article is as follows:A polyaniline/carbon fiber composite electrode material was successfully prepared using a chemical interface method,and the effect of reaction temperature on the morphology and electrochemical performance of the composite electrode material was explored.The composite electrode material synthesized at the optimal reaction temperature can achieve a specific capacitance of 819.2F/g under a constant current charge and discharge of 0.5A/g.The PANI/r GO/cc composite electrode material was prepared by self-assembly method.The specific capacitance of the electrode material after P-70 and graphene composite was effectively improved.The specific capacitance at 0.5A/g current density was 953.4F/g.In addition,PANI/r GO/cc and P-70 samples were tested for cycle performance.The capacity retention rate of PANI/r GO/cc composites after 1000 cycles of charge and discharge was 92.28%.The retention rate of PANI/r GO/cc composite samples was increased by 2.97%compared with P-70 samples,This is because graphene has ultra-high conductivity and flexibility.Wrapping it on the surface of the electrode material can not only enhance the electron transfer rate and improve conductivity,but also restrain the volume changes of polyaniline molecular chain due to doping and dedoping.A simple and safe blending method was used to prepare a polymer electrolyte based on diglycidyl phthalate(HADE)as the matrix,and the epoxy resin polymer with a linear structure blended with HADE was explored.The effect of ethylene glycol diglycidyl ether(PEGDGE)content on the electrochemical performance and mechanical properties of synthetic polymer electrolytes.When the content of PEGDGE resin is about 10wt%,the mechanical and electrochemical properties of the polymer electrolyte reach a balance point,which can better demonstrate its versatility.A simple method of vacuum packaging and curing was used to prepare a solid supercapacitor.The supercapacitor with PANI/r GO/cc composite material as the structural electrode was measured to have an area capacitance of 27.5m F/cm~2 at a current density of 0.2m A/cm~2,which is better than The area capacitance of the supercapacitor assembled by the treated carbon fiber cloth has been improved by nearly two orders of magnitude,and the measured shear strength has increased from 13.69MPa to 15.39MPa,an increase of nearly 10%.This supercapacitor has both energy storage performance and mechanical bearing performance,and is expected to be used in aerospace,weaponry and other fields. |
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