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Application of Cu-doped three-dimensional ordered amorphous titanium dioxide nanotube composite material

A three-dimensional ordered and composite material technology, applied in the development and research of new energy materials, can solve the problems of lithium-ion battery application research, such as few reports, to facilitate the reversible de/intercalation process, improve charge/discharge performance and cycle Stable performance, reduced internal resistance and the effect of charge transfer resistance

Active Publication Date: 2016-01-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cu-doped three-dimensional ordered amorphous TiO prepared by in-situ electrodeposition 2 Nanotube array composite materials have been used in research fields such as photocatalysis and dye-sensitized solar cells, but there are few reports on their application in lithium-ion batteries.

Method used

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  • Application of Cu-doped three-dimensional ordered amorphous titanium dioxide nanotube composite material
  • Application of Cu-doped three-dimensional ordered amorphous titanium dioxide nanotube composite material
  • Application of Cu-doped three-dimensional ordered amorphous titanium dioxide nanotube composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Cu-doped three-dimensional ordered amorphous TiO 2 The nanotube array composite material is used as the working electrode of the lithium-ion battery: no additional conductive agent and binder are added, the Cu-doped three-dimensional ordered amorphous TiO2 nanotube array composite negative electrode material is directly used as the working electrode, and the lithium foil As the counter electrode and reference electrode, the Celgard2500 membrane is used as the diaphragm to contain 1mol / LLiPF 6 The mixture of ethylene carbonate (EC), diethyl carbonate (DEC) and dimethyl carbonate (DMC) is the electrolyte solution, in which the volume ratio of EC, DEC and DMC is 1:1:1, filled with high-purity A button-type simulated lithium-ion battery was assembled in an argon glove box, and its charge / discharge performance and cycle stability were tested by a constant current (50mA / g) charge / discharge method.

[0023] Cu-doped three-dimensional ordered amorphous TiO used in this example...

Embodiment 2

[0025] Cu-doped three-dimensional ordered amorphous TiO 2 Nanotube array composites used as working electrodes for lithium-ion batteries: three-dimensional ordered amorphous TiO doped directly with Cu without adding additional conductive agents and binders 2 The nanotube array composite negative electrode material is used as the working electrode, the lithium foil is used as the counter electrode and the reference electrode, and the Celgard2400 film is used as the diaphragm, with 1mol / LLiPF 6 The mixture of ethylene carbonate (EC) and diethyl carbonate (DEC) is the electrolyte solution, wherein the volume ratio of EC and DEC is 1:1, and the button-type simulated lithium is assembled in a glove box filled with high-purity argon Ion battery, and test its charge / discharge performance and cycle stability by constant current (50mA / g) charge / discharge method, see Figure 4 and Figure 6 , The specific capacity of the first discharge is 291mAh / g, and the stability of 50 charge / disc...

Embodiment 3

[0028] Cu-doped three-dimensional ordered amorphous TiO 2 Nanotube array composites used as working electrodes for lithium-ion batteries: three-dimensional ordered amorphous TiO doped directly with Cu without adding additional conductive agents and binders 2 The nanotube array composite negative electrode material is used as the working electrode, the lithium foil is used as the counter electrode and the reference electrode, and the Celgard2325 film is used as the diaphragm, with 1mol / LLiPF 6The mixture of ethylene carbonate (EC), diethyl carbonate (DEC) and dimethyl carbonate (DMC) is the electrolyte solution, in which the volume ratio of EC, DEC and DMC is 1:1:1, filled with high-purity A button-type simulated lithium-ion battery was assembled in an argon glove box, and its charge / discharge performance and cycle stability were tested by a constant current (50mA / g) charge / discharge method.

[0029] Cu-doped three-dimensional ordered amorphous TiO used in this example 2 Nano...

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Abstract

The invention discloses an application of a Cu-doped three-dimensional ordered amorphous titanium dioxide nanotube composite material, and belongs to the field of development and research of new energy materials. A Cu-doped three-dimensional ordered amorphous TiO2 nanotube array composite material is adopted as a working electrode of a lithium-ion battery. With an amorphous TiO2 nanotube array prepared by an anodic oxidation method as the working electrode, a platinum sheet as a counter electrode, a saturated calomel electrode as a reference electrode, a copper solution as electrolyte, a potentiostatic deposition is carried out for a time period, and then the Cu-doped three-dimensional ordered amorphous TiO2 nanotube composite anode material is prepared. The Cu-doped three-dimensional ordered amorphous titanium dioxide nanotube composite material is simple in preparation technology and friendly to environment; the advantage of high conductivity of metal Cu is fully utilized; and the specific charge / discharge capacity and the cycle stability performance of the electrode are improved.

Description

technical field [0001] The invention relates to a Cu-doped three-dimensional ordered amorphous TiO 2 The application of nanotube composite materials belongs to the field of development and research of new energy materials. Background technique [0002] Although graphite is currently the most commonly used negative electrode material in commercial lithium-ion batteries, when the battery is overcharged, dendritic lithium is easy to precipitate on the surface of the carbon electrode, causing short-circuit safety hazards, and at the same time, the organic electrolyte is easy to form passivation on the surface of the carbon electrode. film (SEI film), and lead to irreversible capacity loss of the battery. Therefore, some alternative anode materials such as Si, Sn, MoO 3 、TiO 2 have aroused great research interest, among which, TiO 2 It has many advantages such as fast charge transfer speed, good safety, and small volume expansion rate, especially TiO prepared by anodic oxidat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M10/0525
CPCH01M4/364H01M10/0525Y02E60/10
Inventor 侯宏英孟瑞晋刘显茜段继祥刘松
Owner KUNMING UNIV OF SCI & TECH
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