Study On Reinforced Polypyrrole/Graphene Oxide Composites In Supercapacitors

Since the 1970s,along with the rapid development of civilization,human beings have gradually deepened their understanding of energy.However,due to the differen-tiation of various governments in market economic policies and the increasing demand for energy use,the world has been continuously eroded by energy crisis.It is generally agreed by scholars that fossil energy will be exhausted gradually and it is urgent for us to develop new energy utilization schemes.At present,in the civil field with the greatest weight,there is a growing call to replace the traditional fossil energy program by means of electrochemical energy storage.Many research structures have shifted their efforts to the field of electrochemical energy storage.Among them,to replace battery materials with small voltage window and low power density,Supercapacitors,which combine the advantages of both conventional capacitors and batteries,are the focus of much more promising research.Therefore,the main research content of this thesis focuses on the preparation of efficient and stable new supercapacitor materials.The specific con-tent is as follows:Since the 1970s,along with the rapid development of civilization,human beings have gradually deepened their understanding of energy.However,due to the differentiation of various governments in market economic policies and the increas-ing demand for energy use,the world has been continuously eroded by energy crisis.It is generally agreed by scholars that fossil energy will be exhausted gradually and it is urgent for us to develop new energy utilization schemes.At present,in the civil field with the greatest weight,there is a growing call to replace the traditional fossil energy program by means of electrochemical energy storage.Many research structures have shifted their efforts to the field of electrochemical energy storage.Among them,to re-place battery materials with small voltage window and low power density,Supercapac-itors,which combine the advantages of both conventional capacitors and batteries,are the focus of much more promising research.Therefore,the main research content of this paper focuses on the preparation of efficient and stable new supercapacitor mate-rials.The specific content is as follows:（1）The modified Hummers method and chemical oxidation polymerization method were used to prepare PPy/GO nanosheets.Ru-Ru O₂ nanoparticles were intro-duced by gel method and calcination,and Ru-Ru O₂/PPy/GO composite nanomaterials were prepared.The results of characterization showed that metal elements were mainly grown on the surface and interlayer of PPy/GO nanosheets in the form of elemental nanoparticles（2-5 nm）.Traditional ruthenium materials are not only expensive,but also PPy/GO has the problem of low utilization ratio of specific surface area in energy storage.Multi-component composite materials improve the overall performance of su-percapacitor materials by controlling the amount of precious metals and optimizing the combination of materials.（2）In order to further provide the energy storage capacity of materials and con-trol the economic cost,we introduced MOF-5 and its carbonized derivatives into the system on the basis of preparing PPy/GO,and synthesized a series of electrode mate-rials.Among them,by in-situ polymerization of Py on the support structure of GO and carbonized MOF,The prepared PGCM nanomaterials showed the best electrochemical performance.Since the porous structure formed by MOF-5 carbonization combined with GO improves the problem of single GO structure and easy to self-stacking,PPy forms a unique diversified spatial structure after synthesis,which not only delays the irreversible expansion of PPy volume due to high-frequency redox reaction,but also enables the ions in the electrolyte to complete adsorption and transfer in the material phase more efficiently,so that PGCM nanomaterials have excellent electrochemical performance.