Application of a three-dimensional ordered titanium dioxide nanotube array composite material doped with graphene

A nanotube array, three-dimensional ordered technology, applied in the development and research of new energy materials, achieves the effects of being beneficial to the reversible de/insertion process, simple preparation and modification process, and reducing internal resistance and charge transfer resistance.

Active Publication Date: 2018-01-12
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current literature on graphene / TiO for Li-ion batteries 2 Most composite electrode materials are prepared by traditional processes, but there are relatively few reports on the use of in-situ self-assembly electrodeposition processes.

Method used

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  • Application of a three-dimensional ordered titanium dioxide nanotube array composite material doped with graphene
  • Application of a three-dimensional ordered titanium dioxide nanotube array composite material doped with graphene
  • Application of a three-dimensional ordered titanium dioxide nanotube array composite material doped with graphene

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Experimental program
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Effect test

Embodiment 1

[0022] In this embodiment, three-dimensional ordered TiO doped with graphene 2 Nanotube array composites used as working electrodes for lithium-ion batteries: three-dimensional ordered TiO doped with graphene directly 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, the Celgard2500 film is used as the diaphragm, and the 1mol / L LiPF 6 The mixture of ethylene carbonate (EC), diethyl carbonate (DEC) and dimethyl carbonate (DMC) is the electrolyte, 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 is assembled with lithium foil in an argon glove box, and its charge / discharge performance and cycle stability are tested by constant current charge / discharge method.

[0023] The graphene-doped three-dimensional ordered TiO described in t...

Embodiment 2

[0025] In this embodiment, three-dimensional ordered TiO doped with graphene 2 Nanotube array composites used as working electrodes for lithium-ion batteries: three-dimensional ordered TiO doped with graphene directly 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, and the 1mol / L LiPF 6 The mixture of ethylene carbonate (EC) and diethyl carbonate (DEC) is the electrolyte, wherein the volume ratio of EC and DEC is 1:1, and it is assembled with lithium foil in a glove box filled with high-purity argon. Button-type simulated lithium-ion battery, test its charge / discharge performance and cycle stability by constant current charge / discharge method.

[0026] The graphene-doped three-dimensional ordered TiO described in this embodiment 2 Nanotube array co...

Embodiment 3

[0028] In this embodiment, three-dimensional ordered TiO doped with graphene2 Nanotube array composites used as working electrodes for lithium-ion batteries: three-dimensional ordered TiO doped with graphene directly 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, the Celgard2325 film is used as the diaphragm, and the 1mol / L LiPF 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 is assembled with lithium foil in an argon glove box, and its charge / discharge performance is tested by a constant current charge / discharge method ( Figure 4 ) and cycle stability performance, and an AC impedance test was performed...

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Abstract

The invention discloses application of a graphene-doped three-dimensional ordered titanium dioxide nanotube array composite material, belonging to the field of development and research of a new energy material. According to the application, the graphene-doped three-dimensional ordered TiO2 nanotube array composite material is used as a working electrode of a lithium ion battery, a TiO2 nanotube array prepared according to an anodic oxidation method is used as the working electrode, a platinum sheet is taken as a counter electrode, a saturated calomel electrode is taken as a reference electrode, an acid graphene oxide suspension liquid containing a supporting electrolyte is used as an electrolyte, and a graphene material is automatically assembled on the surface of a three-dimensional ordered TiO2 nanotube by a constant voltage deposition method so as to obtain the graphene-doped three-dimensional ordered TiO2 nanotube array composite material. The preparation process of the electrode is simple and environmental friendly, and the charging / discharging performance and the cycle stability performance of the titanium dioxide nanotube anode material are improved by using the advantages of high conductivity of graphene.

Description

technical field [0001] The invention relates to a three-dimensional ordered TiO doped with graphene 2 The application of nanotube array composite materials belongs to the field of development and research of new energy materials. Background technique [0002] The electrode preparation process of traditional lithium-ion batteries is usually a physical coating process, that is, the active material is uniformly mixed with a conductive agent and a binder in a certain proportion to form an electrode slurry and coated on the surface of the current collector. During the long-term cycle charge / discharge process, the electrode prepared based on the traditional process often pulverizes and falls off due to the insufficient combination between the active material and the current collector, which reduces the cycle charge / discharge life of the electrode. Therefore, it is necessary to develop a new electrode preparation process. Compared with the traditional electrode preparation process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/587H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/364H01M4/48H01M4/587H01M10/0525Y02E60/10
Inventor 侯宏英孟瑞晋刘显茜刘松段继祥
Owner KUNMING UNIV OF SCI & TECH
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