Preliminary Study On Flexible Programmable Supercapacitor

In the era of the intelligent Internet of Things,the development of the intelligent electronics industry has stimulated a series of related flexible and intelligent modules,such as flexible displays,flexible circuit boards,etc.As the core module,energy storage of intelligent devices,the supercapacitor,as a power device,is essential in electronic devices.Supercapacitors have been widely studied in the field of energy storage,but there is little research that directly links supercapacitors with intelligent functions,let alone systematic research paradigms.In this study,the binding properties of six oxides and six polymers were predicted by molecular dynamics simulation.Through comparative analysis,the binding properties of Ruthenium dioxide and PPy were the best under the same conditions,and the mutual binding energy reached-6214.431 kcal/mol.Then,the best predicted composite material Ru O₂-PPy and the control group Mn O₂-PPy,Mn O₂-PANI and Ru O₂-PANI were successfully prepared by electrochemical deposition through a two-step method.After a long cycle charge-discharge test,it was proved that the composite material Ru O₂-PPy did have the best electrochemical stability.Better cycle life in use.Therefore,the method can be used to predict the electrochemical stability of composite materials,which can greatly improve the efficiency and accuracy of the preparation of electrode active materials in the process of preparing materials.Through electrochemical test calculation,the optimal specific capacitance of Ru O₂-PPy active material is up to 265 F/g,and the power density is up to 1343 W/kg.Furthermore,the pseudocapacitance proportion of the electrode material in the charging and discharging process was analyzed.The calculation shows that the pseudocapacitance proportion increases gradually with the increase of the voltage scanning rate,while the diffusion capacitance proportion decreases gradually due to the limited electron diffusion rate.In addition,to further understand the frequency behavior and reaction process of the electrochemical system composed of capacitors by the electrode,the AC impedance test was carried out,and the diffusion resistance R₁ was 0.786Ω,and the conduction resistance R₂ was 0.188Ω.In the process of electrolyte preparation,molecular dynamics was used to simulate the mechanical properties of polymer PVA.After calculating Young’s modulus,Cauchy pressure and Poisson’s ratio,it can be concluded that PVA is more conducive to the preparation of flexible electrolyte at 80℃.Finally,the thermal response of the assembled flexible programmable capacitor was tested.It was found that the device could fix the temporary shape at minus 20℃,and gradually restore the initial shape at 60℃,but there would be residual deformation.During this process,the specific capacitance of the whole device（about 512 F/g）would not change much.The theoretical calculation method of binding energy proposed in this study provides an efficient prediction and screening method for the preparation of composite materials,and the thermal stimulation shape memory solid gel electrolyte has laid a solid foundation for the research of intelligent devices.