Study On The Preparation And Electrical Properties Of Metal Oxide/Conductive Polymer Materials

In recent years,the excessive use of fossil fuels has led to rising global temperatures and air pollution,making energy issues a focus of public attention.For clean energy such as tidal energy and biomass energy,there is a fatal disadvantage:it cannot meet the continuous energy supply.However,in today's society,various electronic devices require long-term power supply.Therefore,research and development of clean energy with long life and high efficiency energy storage equipment has become the focus of scientific research.As representatives of clean energy,supercapacitors and secondary batteries are indispensable in the field of sustainable development.Many researchers are also committed to the development of cathode materials for energy storage devices.In this paper,four electrode materials are prepared to analyze their morphology,structure and capacitance performance.The main contents are as follows:1.The conductive polymer material polypyrrole is prepared by chemical oxidation method,which is combined with metal oxide(nickel oxide)by in-situ polymerization and then annealed,which is used as the positive electrode material of supercapacitor.The structure test showed that NiO is coated on the surface of PPy nanowires by SEM and TEM,and the composite of NiO and PPy was confirmed successfully through XRD and XPS analysis.The electrochemical and capacitance test results show that NiO/PPy has the largest CV curve area after sintering,the specific capacitance reaches 760 F/g at a current density of 0.5 A/g,and the power density reaches 152.5 Wh/kg,after 10,000 cycles after the test,its capacitance retention rate is 82.5%.2.The "sea urchin-like" spinel nickel cobalt oxide electrode was prepared by hydrothermal method,and 1M KOH and 1M KOH+18-crown ether were used as the electrolyte to study the influence of the electrolyte on the electrochemical performance.The structure test showed that the prepared NiCo₂O₄ has a spinel-type "sea urchin-like" structure.Through the electrochemical and capacitance performance tests,the results show that the NiCo₂O₄ electrode has the best electrochemical performance in 1M KOH+18-crown ether electrolyte,and the specific capacitance reaches 1500.3 F/g at a current density of 0.5A/g,and the power density reaching 602.2 Wh/kg,after 10,000 cycles of cyclic testing,the capacitance retention rate is 96%.3.The zinc vanadate with the ultra-long nano wire structure is prepared by hydrothermal method,and the composite electrode material of nitrogen-doped carbon material and zinc vanadate is obtained by compounding it with polyaniline by in-situ polymerization and annealing to obtain a composite electrode material of nitrogen-doped carbon material and zinc vanadate.Cathode material for zinc-ion batteries.The structure test showed that:PANI and ZVO were successfully composited,and after high temperature calcination,PANI was decomposed to obtain nitrogen-doped carbon material.Through electrochemical and capacitance performance tests,the results show that the specific capacity of the ZVO/PANI(burned)electrode is 295 mAh/g at a current density of 0.1 A/g,and its capacitance retention rate is 86%after 10,000 cycles.4.The spinel-type copper manganate material is prepared by a chemical method,and the composite electrode material is obtained by compounding it with polyaniline through an in-situ polymerization method and then annealing.The structure test shows that CuMn₂O₄ is a layered cube structure,and it is proved that PANI and CuMn₂O₄ are successfully composited.Through electrochemical and capacitance performance tests,the results show that the specific capacity of the electrode after CuMn₂O₄/PANI sintering at a current density of 0.1 A/g is 562.6 mAh/g,and its capacitance retention rate is 87.8%after 10,000 cycles.