Preparation And Electrochemical Performance Of Novel N-Doped Porous Carbon/Ployaniline Composite

Nitrogen-doped porous carbon have broad application prospects as electrode materials for supercapacitor. The nitrogen functional groups on carbon skeleton can not only provide pseudocapacitance effect, but also improve the surface wettability of electrode materials. And the nitrogen-doped carbon and conducting polymer composites also attract attention. In this paper, nitrogen-doped activated porous carbon (NMC) ensembles on organic monthmorillonite (OMMT) was simply prepared by hydrothermal carbonization, nitrogen, and KOH activated. On the basis, the composites of the activated porous carbon and PANI (NMC@PANI), metal ion doping the composites (NMC@PANI@M+), and activated porous carbon/PANI/metal oxide (NMC@PANI@MOX) are prepared by different methods.For the composites, morphology observation, structure characterization, and electrochemical capacitivetests were investigated by Fourier transform infrared spectroscopy(FTIR), X-ray diffraction(XRD), Ramanspectra, the Brunauer-Emmett-Teller (BET), X-ray Photoelectron Spectroscopy (XPS), scanning electron microscopy(SEM), and electrochemical workstation.Firstly, OMMT and glucose were used as raw material to prepare OMMT/C by hydrothermal carbonization and heat under nitrogen atmosphere.The influences of the ratio of OMMT/glucose, carbonization time and the PH of solution on the capacitance properties of OMMT/C was discussed. The nitrogen enriched carbons were prepared by the mixture of OMMT/HC and melamine at high temperature, and the effect of nitrogen doped on the capacitance was researched. And the nitrogen-doped activated carbons were prepared by potassium hydroxide activation of nitrogen enriched carbon precursors at 400℃, which were derivated from the carbonization of melamine with OMMT/HC. The morphology observation, structure characterization, and electrochemical capacitive tests were investigated by a series measurement.Secondly, the composites of polyaniline and NMC were prepared in-situ polymerization, which were doped by HCl, HCl/DCSA was designed, respectively. The effect of the doping with different acid and sodium dodecyl sulfate on the morphology, crystallization degree, and specific capacitance of the composites were investigated.Next, the NMC@PANI composites codoped with Ni2+/H+ and Co2+/H+ were prepared using the transition metal in HCl solution by in-situ polymerization method. The effect of the concetrantion of metal ions on the microstructure and crystallization degree of the composite materials was researched. On the basis, the capacitance properties and cycle stability of the NMC@PANI@M+ were studied.Finally, the binary composite NMC@MnO2 was successfully produced through the ultrasonic dispersion method, on which polyaniline was successfully synthesized via the in-situ polymerization to obtain ternary resulting composite NMC@MnO2@PANI. The microstructure of the ternary composite was examined by SEM, and the electrochemical performance of the composite was studied by electrochemical workstation.