Preparation method of transition metal carbide/nitride nanoparticles and application of transition metal carbide/nitride nanoparticles in lithium-air batteries
A transition metal and nanoparticle technology, applied in the direction of nitrogen-metal/silicon/boron binary compounds, carbides, nitrogen compounds, etc., can solve the problem of difficult control of transition metal content and Langmuir surface area, unsuitable for industrial production, High cost and other problems, to achieve the effect of favorable electron migration, low cost of raw materials, and good conductivity
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Embodiment 1
[0029] Take about 80g of titanium block and put it into the powder generation chamber of the plasma evaporation equipment to evaporate on the anode, pass through 0.01MPa methane, and evaporate the metal raw material under the conditions of voltage 30V and current 90A to obtain carbon-coated transition metal titanium carbide nanoparticles.
[0030]The above-mentioned carbon-coated transition metal carbide nanomaterials are fabricated into lithium-air battery electrode sheets. Among them, the electrode sheet is mixed evenly with 30% carbon-coated titanium carbide nanomaterials, 60% Super P and 10% polyvinylidene fluoride (PVDF) binder, and an appropriate amount of N-methylpyrrolidone (NMP) is added. Dissolve the slurry and apply the slurry on a carbon paper current collector to make an electrode; the experimental electrode was dried in a vacuum oven at 110°C for 12 hours, and the battery was assembled in a high-purity argon atmosphere glove box. The electrolyte is 1mol / L LiTFSI ...
Embodiment 2
[0036] Take about 80g of titanium block and put it into the anode of the powder generation chamber of the plasma evaporation equipment for evaporation. At the same time, 0.01MPa methane and 0.02MPa argon gas are introduced, and the metal raw material is evaporated under the conditions of voltage 30V and current 90A to obtain titanium carbide nanoparticles.
[0037] The XRD pattern of the titanium carbide nanomaterial that embodiment two obtains is as follows Figure 5 shown. From the diffraction peaks in the figure, it is determined that the nanomaterial is a single-phase titanium carbide.
[0038] In the second embodiment, Image 6 It is the cycle curve at a current density of 100mA / g and a constant volume of 500mAh / g. It can be seen from the figure that when the titanium carbide nanomaterial prepared in the present invention is used as a cathode catalyst for a lithium-air battery, its cycle performance is very stable, and it can be cycled 10 times at a constant volume.
Embodiment 3
[0040] Take about 60g of titanium block and put it into a copper crucible, add 0.03MPa nitrogen gas, put the copper crucible into the anode of the powder generation chamber of the plasma evaporation equipment to evaporate, and feed 0.015MPa hydrogen gas at the same time, evaporate the metal under the condition of voltage 30V The raw material is titanium nitride nanometer material.
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