The Study On The Preparation And Performance Of Polyaniline-modified Hierarchical Graphene Fiber Based Wearable Supercapacitor

In recent years,new energy industry has attained great development,which caused the whole society in urgent demand of energe-storge materials.As a new type energe storge device,supercapacitor has a fast charge-dischare speed and a high power density,which arosed huge attention of every field of society.In this background,as life-related electronic devices,flexible displays,mobile phones and computers would have more needs for flexibility,thus more and more researches have focused on the flexible supercapacitor energe storge devices.In this article,we use carbon fiber and graphene as basic materials,and combine these with nano-size PANi in order to fabricate new-type supercapacitor materials—PANi/graphene fiber,thus try to illustrate the influence of PANi microstructure to the performance of composite materials.Three methods are used to fabricated PANi/graphene fiber which are traditional liquid-phase synthesis methods,improved liquid-phase synthesis methods,electropolymerization methods.The morphology of PANi would differ from each other because of synthesis methods,thus we could make sure which PANi morphology could optimize their electrochemical performance.Moreover,by controling the reaction time we can confirm the optimum reaction time and then fabricated the best composite materials to design and assemble the wearable supercapacitor which is prepared by improved liquid-phase synthesis methods in lh.This graphene/PANi fiber differ from traditional supercapacitor electrode materials,it has extremly tiny volume,strong energy-storge ability,flexibity and integrity which can not be performed by traditonal supercapacitor.More importantly,this composite material has an excellent electrochemical performance and could be assembled into supercapacitor devices which could be delighted for 3 minutes after charging showing its practicability.