Research On Flexible Solid-state-capacitors For Wearable Self-powered Micro-system

Nowadays,the internet of things and mutli-discipline industry is gradually entering our daily lives and we can enjoy those new technologies by the interconnection methods,and it has caused great changes in traditional interaction methods such as the intersection of biological perception technology and microelectronics and other disciplines.It brings new development possibilities for wearable electronic devices.Some new markets have become popular subdivisions,and the popularity and application rate of flexible wearable electronic products are also enhancing with the development of new find.In order to satisfy the daily experimence of those new wearable products and meet the needs of users,the research on flexible energy storage electronics is becoming more and more important.Unlike other types of energy storage devices,supercapacitors can achieve rapid charging and discharging.According to the working model of supercapacitors,its types can be divided into electric-double-layer capacitor models and pseudocapacitance models.In order to meet the applicability and matching in the wearable field,supercapacitors need to be able to have good mechanical properties and stable electrochemical output characteristics under some conditions such as stretching,torsion,and bending.In terms of specific contents,this article introduces the recent researches and development backgrounds in the wearable field and summarizes the recent development of supercapacitors.Then this article discusses the basic working principle of solid-state supercapacitors.Then this article describes the preparation process and preparation methods of flexible electrodes and flexible solid-state supercapacitors.Finally,through some electrochemical testes of different electrode structures and devices under different inks,the influence of the two was analyzed and the optimal value was determined.Through the modification research of polyvinyl alcohol,this paper prepares a conductive composite film with hydrolysis resistance.And at the same time,this paper sets up a control experimental group based on the modified polyvinyl alcohol and discusses the influence of the ink composition and the different structures of aspect ratio on the solid-state supercapacitors.As a step in the innovative development of wearable energy storage devices,by researching innovative electrode materials and the modification of polyvinyl alcohol,a conductive composite film with hydrolysis resistance was prepared in this paper,and the effect of modified polyvinyl alcohol on the performance of the device was analyzed.The device does not require additional substrates,and the electrodes and electrolytes are composed of polyvinyl alcohol.The structure has a certain degree of flexibility and transparency.At the same time,the device also has some characteristics such as a small size and light weight.When the electrode structures and inks are optimal,the area specific capacitance of the solid-state capacitor is 20.38 m F/cm~2 when the scan rate is 30 m V/s,and the device can be within 136 seconds when the current density is 0.5 m A/cm~2,can continuously charge and discharge 3 times.