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Preparation method and applications of carburized titanium dioxide nanotube array

A technology of nanotube array and titanium dioxide, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of unfavorable production application, high production cost, poor repeatability, etc., and achieve low cost and full Improved discharge capacity and easy operation

Inactive Publication Date: 2015-05-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these methods have complex procedures, poor repeatability, and high production costs, which are not conducive to actual large-scale production applications.

Method used

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  • Preparation method and applications of carburized titanium dioxide nanotube array
  • Preparation method and applications of carburized titanium dioxide nanotube array
  • Preparation method and applications of carburized titanium dioxide nanotube array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of titanium dioxide nanotube arrays by anodic oxidation method: the pure Ti sheet (thickness 0.1mm) was cleaned by ultrasonic oscillation in acetone, absolute ethanol, and deionized water for 10 minutes to remove surface grease, and then the titanium sheet was chemically polished (polishing Liquid HF, HNO 3 and H 2 O volume ratio is 1:1:4), the sample is cleaned and dried in the air for later use; the Ti sheet is used as the positive electrode, and the Pt sheet is used as the counter electrode. 4 Add 0.2mol / L of H to F solution 3 PO 4 In the aqueous solution, the pH value was adjusted to 3, the oxidation voltage was 20V, and oxidized for 1 hour; the prepared sample was washed with deionized water and dried for later use.

[0029] (2) Plasma carburizing treatment to prepare carburized titanium dioxide nanotube arrays: In a double-layer glow plasma carburizing furnace, the titanium dioxide nanotube arrays prepared in step (1) were fixed on the cathode, ...

Embodiment 2

[0033] (1) Preparation of titanium dioxide nanotube arrays by anodic oxidation method: the pure Ti sheet (thickness 0.2mm) was ultrasonically cleaned in acetone, absolute ethanol, and deionized water for 30 minutes to remove surface grease, and then the titanium sheet was chemically polished (polishing Liquid HF, HNO 3 and H 2 O volume ratio is 1:1:4), the sample is cleaned and dried in the air for later use; the Ti sheet is used as the positive electrode, and the Pt sheet is used as the counter electrode. 4 In the ethylene glycol organic solution of F, the oxidation voltage was 60V, and the oxidation was performed for 3 hours; the prepared samples were washed with deionized water and dried for later use.

[0034] (2) Plasma carburizing treatment to prepare carburized titanium dioxide nanotube arrays: in a double-layer glow plasma carburizing furnace, fix the titanium dioxide nanotube arrays prepared in step (1) on the cathode, and connect the anode with methane as the carbon s...

Embodiment 3

[0037] (1) Preparation of titanium dioxide nanotube arrays by anodic oxidation method: clean the pure Ti sheet (thickness 0.1 mm) in acetone, absolute ethanol, and deionized water for 15 minutes with ultrasonic oscillation to remove surface grease, and then chemically polish the titanium sheet (polishing Liquid HF, HNO 3 and H 2 O volume ratio is 1:1:4), the sample is cleaned and dried in the air for later use; the Ti sheet is used as the positive electrode, and the Pt sheet is used as the counter electrode. 4 In the dimethyl sulfoxide organic solution of F, the oxidation voltage is 50V, and the oxidation is performed for 2 hours; the prepared sample is washed with deionized water, and dried for later use.

[0038] (2) Plasma carburizing treatment to prepare carburized titanium dioxide nanotube arrays: in a double-layer glow plasma carburizing furnace, the prepared titanium dioxide nanotube arrays were fixed on the cathode, and the carbon sheet was used as the carbon source t...

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Abstract

The invention discloses a preparation method and applications of a carburized titanium dioxide nanotube array, which belong to the technical field of lithium ion battery electrodes. The method disclosed by the invention comprises the following steps: in fluorine-containing electrolyte, by taking a pure titanium sheet as an anode, preparing an orderly titanium dioxide nanotube array by using an anodic oxidation method; carrying out low-temperature plasma carburizing treatment on the prepared nanotube array at low temperature, so that a carburized titanium dioxide nanotube array is obtained. By taking the prepared carburized titanium dioxide nanotube array as a lithium battery cathode material and assembling the array into a half cell, the cell is subjected to electrochemical performance detection, and detection results show that the reversible lithium insertion capacity of the cell is 235 mAh / g, which is far higher than an undoped sample capacity, and the cell has better cycling stability. The method has the advantages of simple operation, low cost, easiness for mass production, and the like, and has a broad application prospect in the fields of photocatalysis and lithium batteries, and the like.

Description

technical field [0001] The invention relates to a preparation method and application of a carburized titanium dioxide nanotube array, belonging to the technical field of lithium ion battery electrodes. Background technique [0002] Due to the continuous consumption of fossil fuels such as petroleum and the impact of carbon-emitting greenhouse gases on the global climate, countries around the world are actively developing new energy systems that can replace these traditional energy sources; high capacity / energy density represented by lithium-ion secondary batteries , clean and pollution-free new energy system has become a hot spot of global attention and research. [0003] At present, the anode materials that have been practically used in lithium-ion batteries are generally carbon materials, such as graphite, soft carbon, hard carbon, and the like. The anode materials being explored include nitrides, tin-based anode materials, nano-alloys, metal oxides, and some other nano-a...

Claims

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Application Information

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IPC IPC(8): C25D11/26H01M4/48H01M4/131B82Y30/00B82Y40/00
CPCH01M4/48H01M4/625C25D11/26B82Y30/00B82Y40/00Y02E60/10
Inventor 刘建雄马淼胡晓晓
Owner KUNMING UNIV OF SCI & TECH
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