In this study,nano-polyanline and manganese oxide nanometer tubular composites（nano-PANI@MnO2）were prepared by a surface initiated polymerization method and used as electrochemical capacitor electrode materials; and...In this study,nano-polyanline and manganese oxide nanometer tubular composites（nano-PANI@MnO2）were prepared by a surface initiated polymerization method and used as electrochemical capacitor electrode materials; and the effect of aniline amount on the microstructure and electrochemical performance was investigated. The microstructures and surface morphologies of nano-PANI@MnO2 were characterized by X-ray diffraction,scanning electron microscopy and fourier transformation infrared spectroscope. The electrochemical performance of these composite materials was performed with cyclic voltammetry,charge–discharge test and electrochemical impedance spectroscopy,respectively. The results demonstrate that the feed ratio of aniline to MnO2 played a very important role in constructing the hierarchically nano-structure,which would,hence,determine the electrochemical performance of the materials. Using the templateassisted strategy and controlling the feed ratio of aniline to MnO2,the nanometer tubular structure of nanoPANI@MnO2 was obtained. A maximum specific capacitance of 386 F/g was achieved in aqueous 1 mol/L Na NO3 electrolyte with the potential range from 0 to 0.6 V（vs. SCE）.展开更多
Electrical conductivity and pH sensitivity of nano-PANI membrane was studied. In this work,an ordered porous nano-polyaniline/acrylate gel polymer( PAGP) membrane was prepared from methyl methacrylate( MMA)/acrylic ac...Electrical conductivity and pH sensitivity of nano-PANI membrane was studied. In this work,an ordered porous nano-polyaniline/acrylate gel polymer( PAGP) membrane was prepared from methyl methacrylate( MMA)/acrylic acid( AA)/nano-PANI bicontinuous microemulsions. The morphology,electric conductivity and p H sensitivity of the composite membrane were studied using scanning electronic microscopy,atomic force microscopy,and electrochemical impedance spectroscopy. It was found that the polymer matrix comprises of two types of proton migrating tunnels: interconnect hydrophilic trench( IHT) and continuous amphiphilic matrix( CAM). The increase of doped nano-PANI particles in those channels leads to a formation of three dimension grain-boundary network. It contributes to the short response time and good reversibility of the sensors. Impedance changes in the low-frequency region reveal an inductive behavior to PANI membrane,which maybe the contribution of faradaic pseudocapacitance of the polymer materials.展开更多
基金supported by the National Natural Science Foundation of China (51203071,51363014 and 51362018)China Postdoctoral Science Foundation (2014M552509)+2 种基金the Opening Project of State Key Laboratory of Polymer Materials Engineering (Sichuan University) (sklpme2014-4-25)the Program for Hongliu Distinguished Young Scholars in Lanzhou University of Technology (J201402)the University Scientific Research Project of Gansu Province (2014B-025)
文摘In this study,nano-polyanline and manganese oxide nanometer tubular composites（nano-PANI@MnO2）were prepared by a surface initiated polymerization method and used as electrochemical capacitor electrode materials; and the effect of aniline amount on the microstructure and electrochemical performance was investigated. The microstructures and surface morphologies of nano-PANI@MnO2 were characterized by X-ray diffraction,scanning electron microscopy and fourier transformation infrared spectroscope. The electrochemical performance of these composite materials was performed with cyclic voltammetry,charge–discharge test and electrochemical impedance spectroscopy,respectively. The results demonstrate that the feed ratio of aniline to MnO2 played a very important role in constructing the hierarchically nano-structure,which would,hence,determine the electrochemical performance of the materials. Using the templateassisted strategy and controlling the feed ratio of aniline to MnO2,the nanometer tubular structure of nanoPANI@MnO2 was obtained. A maximum specific capacitance of 386 F/g was achieved in aqueous 1 mol/L Na NO3 electrolyte with the potential range from 0 to 0.6 V（vs. SCE）.
基金Sponsored by the National Natural Science Foundation of China(Grant No.51571093)the Fundamental Research Funds for the Central Universities(Grant No.2015ZM094)
文摘Electrical conductivity and pH sensitivity of nano-PANI membrane was studied. In this work,an ordered porous nano-polyaniline/acrylate gel polymer( PAGP) membrane was prepared from methyl methacrylate( MMA)/acrylic acid( AA)/nano-PANI bicontinuous microemulsions. The morphology,electric conductivity and p H sensitivity of the composite membrane were studied using scanning electronic microscopy,atomic force microscopy,and electrochemical impedance spectroscopy. It was found that the polymer matrix comprises of two types of proton migrating tunnels: interconnect hydrophilic trench( IHT) and continuous amphiphilic matrix( CAM). The increase of doped nano-PANI particles in those channels leads to a formation of three dimension grain-boundary network. It contributes to the short response time and good reversibility of the sensors. Impedance changes in the low-frequency region reveal an inductive behavior to PANI membrane,which maybe the contribution of faradaic pseudocapacitance of the polymer materials.
