Preparation And Study On Electrochemical Performance Of PVDF-based Carbon Nanofibers And PFSA-Ag Colloid

Electrochemistry is a science that studies the mutual conversion between electrical and chemical energy and the related laws in the process of conversion.Electrochemistry has gradually affected many disciplines and fields.And because of its special physical and chemical properties,inorganic nanomaterials have huge application potential in supercapacitors and electrochemical sensors.This paper briefly introduces the classification,principle,and research progress of electrode materials for supercapacitors and electrochemical sensors.We prepared different inorganic nanomaterials and applied them to supercapacitors and electrochemical sensors,respectively.The main research contents are as follows:(1)In the second chapter,we use electrospinning and carbonization to obtain two kinds of carbon nanofibers.Electrochemical test results show that the specific capacitance of C-H carbon nanofibers can reach 331 F g-1,and also has excellent cycle stability.Using it as an electrode material,a symmetrical all-solid-state supercapacitor is assembled.The component has a maximum specific capacitance of 147.4 F g-1 at 1 Ag-1.When the power density is 111.1 W Kg-1,the maximum energy density of the module can reach 13.1 Wh Kg-1.The component has good rate performance and cycle stability.It shows that C-H carbon nanofibers are a kind of potential supercapacitor electrode material.(2)In the third chapter,we use PFSA as a stabilizer and use solvothermal method to prepare different PFSA-Ag colloids under different conditions.When the PFSA(1%):AgNO3=1:0.3,the reaction temperature is 140,and the reaction time is 4 h,the obtained PFSA-Ag colloid(P-30)has the best stability and is resistant to The detection is the most sensitive.GCE was modified with P-30 as the active material to obtain an electrochemical sensor for 4-NP detection.The linear interval is 0.02-10 pM,and the detection limit is 0.015 ?M.In addition,the sensor also has excellent stability,repeatability,anti-interference ability and practicality.