Mechanical Chemical Synthesis Of Transition Metal Carbon And Nitrogencompounds And Its Characteristic Research

Transition metal carbonitride compounds could exhibit many very excellent physical properties, such as high hardness, high melting point, good abrasion resistance and electrical conductivity, good chemical stability, has been widely used in cutting tools, wear-resistant coating, high temperature structural components, ceramic composite materials. Recently the people found that with similar electric catalytic activity features such as precious metals platinum. These ones transition metal carbonitrides in science basic and applied fields have a pivotal role. Lithium ion battery is a new type of recycled secondary battery, high energy density and the relatively simple reaction mechanism that makes it one of the most attention hot spot. In this paper, the use of mechanical chemically synthesized transition metal carbonitrides.And this paper researched that whether or not cycling performance of the lithium-ion battery with transition metal carbon and nitrogen compounds is fluenced by electro-catalytic activity. The main research content are as follows:First of all, in this paper, we use the mechanical chemical method, through high energy ball milling elemental metal powder and liquid organic compounds(toluene, ethylene diamine) synthesized nanocrystalline powders of tungsten carbide, titanium carbide, titanium carbonitride and other transition metal compounds carbon and nitrogen. And we use the theory of X-ray diffraction(XRD) method to qualitative analysis different ball milling time powder and study their phase structure and relevant physical properties.Secondly, the microstructure of ball milling 50 h, 60 h, 70 h tungsten carbide sintered body and ball milling 70 h tungsten carbide vacuum annealed samples were characterized by using the field emission scanning electron microscope. And we tested density and hardness performance of ball milling 50 h, 60 h, 70 h tungsten carbide sintered block. The sintering densification of nanocrystalline tungsten carbide powders was carried out by using the spark plasma sintering method and its phase structure of sintered body was analysed by X-ray diffraction. We also research relational physical properties.Finally, we select ball milling 50 h, 60 h, 70 h tungsten carbide nanopowders, ball milling 30 h, 40 h, 50 h titanium carbide annealing nanopowders and ball milling 60 h, 70 h titanium carbonitride nanopowders, as lithium secondary battery cathode material, make different current densities cycle performance testing, and the field emission scanning electron microscopy and transmission electron microscopy were used to characterize their microstructure, using cyclic voltammetry(CV), alternating current impedance testing analyse the electrochemical kinetics process, and we research cycle performance mechanism of the transition metal carbon and nitrogen compound in the lithium-ion battery electrode materials.