Preparation method and application of xanthium sibiricum-shaped nano composite electrode material
A composite cathode material and nanocomposite technology, which is applied in the preparation of Xanthium-shaped nanocomposite electrode materials and its application fields, can solve the problem of low discharge specific capacity and rapid capacity decay, low discharge specific capacity capacity decay, active material reduction, etc. problems, to achieve a more stable charging and discharging platform, reduce internal resistance, and enhance the effect of adsorption
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Embodiment 1
[0042] (1) Preparation of cocklebur-like nanocomposites
[0043] Stir 5.6mL tetrabutyl titanate and 2.8mL concentrated hydrochloric acid with a concentration of 36% at room temperature for 10min to obtain a tetrabutyl titanate / hydrochloric acid mixed solution; then, add 16.8mL absolute ethanol at a speed of 5mL / min Add it dropwise into the tetrabutyl titanate / hydrochloric acid mixed solution, oscillate with ultrasonic wave for 3h until the solution becomes homogeneous, then form TiO 2 Precursor solution;
[0044] In the aforementioned TiO 2 Add 1.3g of ammonium metavanate to the precursor solution, stir evenly at room temperature, put it into a hydrothermal kettle, and synthesize the precursor material in a hydrothermal kettle at 100°C for 10 hours, and put the obtained precursor in a drying oven for 60 ℃ drying for 8 hours; the dried material was calcined in a high-purity argon atmosphere at 300 ℃ for 8 hours, then cooled, taken out, and ground to obtain cocklebur-like TiO ...
Embodiment 2
[0052] (1) Preparation of cocklebur-like nanocomposites
[0053] Stir 5.6mL tetrabutyl titanate and 2.1mL concentrated hydrochloric acid with a concentration of 36% at room temperature for 20min to obtain a mixed solution of tetrabutyl titanate / hydrochloric acid; Add it dropwise into the tetrabutyl titanate / hydrochloric acid mixed solution, oscillate with ultrasonic wave for 5h until the solution becomes homogeneous, then form TiO 2 Precursor solution;
[0054] In the aforementioned TiO 2 Add 1.95g of ammonium metavanate to the precursor solution, stir it evenly at room temperature, put it into a hydrothermal kettle, and synthesize the precursor material in a hydrothermal kettle at 180°C for 16 hours, then put the obtained precursor material in a drying oven to Dry at 80°C for 12h; calcinate the dried material at 400°C for 10h in a high-purity argon atmosphere, then take it out after cooling, and grind to obtain cocklebur-like TiO 2 / NH 4 VO 3 powder.
[0055] Cocklebur ...
Embodiment 3
[0063] (1) Preparation of cocklebur-like nanocomposites
[0064] Stir 5.6mL tetrabutyl titanate and 0.5mL concentrated hydrochloric acid with a concentration of 36% at room temperature for 30min to obtain a tetrabutyl titanate / hydrochloric acid mixed solution; then, add 16.8mL absolute ethanol at a speed of 7mL / min Add it dropwise into the mixed solution of tetrabutyl titanate / hydrochloric acid, oscillate with ultrasonic wave for 8h until the solution becomes homogeneous, then form TiO 2 Precursor solution;
[0065] In the aforementioned TiO 2 Add 26g of ammonium metavanadate to the precursor solution, stir evenly at room temperature, put it into a hydrothermal kettle, and synthesize the precursor material in a hydrothermal kettle at 220°C for 30 hours, and put the obtained precursor material in a drying oven for 90 ℃ drying for 20 hours; the dried material was calcined at 800 ℃ for 12 hours in a high-purity argon atmosphere, then cooled, taken out, and ground to obtain cock...
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