Transition metal carbide as a new electronic conductor
Tungsten carbide is a run of the mill progress metal carbide, which is a part of hexagonal system. Tungsten carbide has great conductivity, and nano-sized tungsten carbide can possibly have same function as noble metals for being impetuses for hydrogen development. In this manner, it has pulled in wide consideration in the field of reactant hydrogen advancement.
Electrospinning is a straightforward and powerful innovation for the arrangement of carbon nanofibers. Polymer arrangement is spinned by high voltage electrostatic turning, trailed by Pre-oxidation and high temperature carbonization to get ready carbon nanofibers with three-dimensional permeable structure, high explicit surface zone and high conductivity. A few researchers have proposed a planning strategy for tungsten carbide-carbon nanofibers composite layers. The exploratory procedure is as per the following:
(1)0.75g ammonium tetrathiotungstate and 0.5g polyacrylonitrile powder were included into 5mL N, N-dimethylformamide dissolvable and mixed consistently to acquire homogeneous thick scattering.
(2)The electrospinning process parameters of the got scattering arrangement are as per the following: the electrostatic field voltage is 20 kV, the turning speed is 0.1 mm min-1, the accepting separation is 20 cm, and the ammonium tetrathiotungstate/polyacrylonitrile turning film is acquired.
(3)Ammonium tetrathiotungstate/polyacrylonitrile composite films were set up by pre-oxidation of the acquired turning layers in air, with pre-oxidation temperature of 250 C, warming rate of 2 min-1 and pre-oxidation steady temperature time of 2 h.
(4)The acquired pre-oxidized ammonium tetrathiotungstate/polyacrylonitrile composite film was carbonized at high temperature in argon-hydrogen environment in one stage. The warmth treatment temperature was 700 C, the warming rate was 5 C min-1, and the consistent temperature time was 5 h. The tungsten carbide-inserted carbon nanofibers composite film was set up by in-situ calcination technique, which was recorded as W2C/CNF-1.
In the electrochemical test, the carbon nanofiber composite was utilized as the positive cathode and lithium sheet as the negative terminal to collect the clasped semi-battery. The capacitance of the carbon nanofiber composite was contemplated by the charge-release bend of the battery. It very well may be seen from the charge-release bends that the particular limit of the WC-installed carbon nanofibers composite layer get together battery is fundamentally expanded when the present thickness is 0.1Ag contrasted and that of unadulterated carbon nanofibers. It very well may be utilized as a perfect adaptable self-supporting anode material for new vitality gadgets, for example, lithium particle batteries and supercapacitors.