Oxygen electrode of lithium air battery as well as preparation method and application thereof
A lithium-air battery and oxygen electrode technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of electrocatalytic active materials and achieve good catalytic activity and reduce consumption
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Embodiment 1
[0042] The Ti sheets were cleaned with ethanol, and the mass fraction was 0.5% NH 4 In the ethylene glycol solution of F, the anode electrochemical corrosion was carried out, in which Ti was used as the anode and the Pt sheet was used as the negative electrode. The anode corrosion potential is 60V, and the corrosion time is 8h. Obtained TiO 2 Nanotube arrays at 800 °C, NH 3 The TiN nanotube array was obtained by reducing at high temperature for 1 h in the atmosphere. Pt nanoparticles were deposited into TiN nanotube arrays by electrochemical deposition with an electrolyte of 0.25 mM H 2 PtCl 6 Dissolved in 0.1M HCl and electrodeposited by cyclic voltammetry. The potential range is -0.6~0.1V, and the scanning speed is 20mVs -1 , 10 cycles of deposition, that is, a coaxial sleeve structure of Pt / TiN is obtained. The composite electrode is a 1cm×1cm square pole piece with a thickness of 100μm, in which the thickness of the TiN nanotube array loaded with Pt nanoparticles is...
Embodiment 2
[0044] Diameter 200nm TiO 2 Preparation of mesoporous spheres: Mix 2mL tetrabutyl titanate and 50mL ethylene glycol, stir for 8 hours, then add 170mL acetone and 2.7mL water to the mixed solution, stir for 1 hour, centrifuge to collect the precipitated material, and use Centrifuge and wash five times with water and ethanol. The precipitate was collected, dried overnight at 80°C, and ground to obtain a white powder. The precipitate was refluxed with twice distilled water at 80°C for 3 hours, collected by centrifugation, and washed five times with distilled water. Collect the precipitate, dry it overnight at 80°C, and grind it to get a white powder, which is TiO 2 Mesoporous spheres.
[0045] 119mg TiO 2 Mesoporous spheres and 221 mg of cyanamide (Ti: N = 1: 7) were ultrasonically dispersed in 2 mL of distilled water for 5 minutes, and the two groups of solutions were mixed and continued to be ultrasonically dispersed for 20 minutes. 10 mg of ammonium molybdate was dissolved ...
Embodiment 3
[0047] The Ti sheets were cleaned with ethanol, and the mass fraction was 0.5% NH 4 In the ethylene glycol solution of F, the anode electrochemical corrosion was carried out, in which Ti was used as the anode and the Pt sheet was used as the negative electrode. The anode corrosion potential is 60V, and the corrosion time is 8h. Will get TiO 2 The nanotube array was placed in 1mM ammonium molybdate solution for 1h, and then the pole piece was carefully rinsed with water, and dried at 280°C for 3h, and the MoO-loaded 3 TiO 2 Nanotube arrays were placed in a tube furnace in NH 3 800°C high temperature reduction in the atmosphere, the heating rate during the heating process is 5°C min -1 . The composite electrode of MoN / TiN nanotube array can be obtained.
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