Synthesis Of Boron Carbonitride Nanomaterials And Electrochemical Properties

In this paper, the carbonitride (CN) compounds and boron carbonitride (BCN)compounds were synthesized with different morphologies through two methods ofsolvothermal and pyrolysis precursor. The morphologies, chemical compositions andperformance of the products were respectively characterized and tested with transmissionelectron microscopy (TEM), electron energy loss spectroscopy (EELS), scanning electronmicroscope (SEM), X-ray energy dispersive spectroscopy (EDS), Fourier transforminfrared spectroscopy (FTIR), X-ray powder diffraction (XRD), select area electrondiffraction (SAED), electrochemical workstation and charge and discharge device.The carbonitride compounds and boron carbonitride compounds were prepared usingthe melamine (C3H6N6), ammonium fluoroborate (NH4BF4), sodium boron hydride(NaBH4) and sodium azide (NaN3) as raw material, acetonitrile (CH3CN) and benzene assolvent through the method of solvothermal. The influence of different experiental factorssuch as raw materials, solvents and heating time on morphology were discussed. Resultsshow that the crystalline rod-like carbonitride compounds were prepared using themelamine as precursor. The porous carbonitride compounds could be obtained after addingsodium azide into the raw materials. It was easier to generate spherical morphology asincreasing the heating time in the preparation of carbonitride compounds. In thepreparation of boron carbonitride compounds, the bunchy BCN materials were obtainedby using benzene as solvent, ammonium fluoborate and sodium borohydride as feedstock.The tubular and hollow spherical BCN materials can be obtained after adding sodiumazide into the raw materials. A large number of needlelike BCN materials were formedusing acetonitrile instead of benzene as a solvent.The boric acid and ethylene diamine as feedstock, BCN nanoparticles with differentdispersity and size were prepared with the P123, F127and CTAB as carrier. Results showthat the BCN particles were generated as separate particles using P123as a carrier. Theembedded BCN particles and nanorodlike BCN compounds were synthesised with F127and CTAB, respectively. The case of using P123had the best performance on capacitance. Comparing the performance of three products, the performance gradually deteriorated asthe particle becomes larger. The phenolic resin was added into the program F127toimprove the performance. The influence of phenolic resin on the performance of materialswas discussed.