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Lithium titanate flexible self-supporting composite electrode and preparation method thereof

A composite electrode, self-supporting technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems that are difficult to apply to flexible lithium-ion batteries, achieve good rate performance and cycle stability, high flexibility, good conductivity and mechanical intensity effect

Pending Publication Date: 2019-01-22
SHENZHEN BAK POWER BATTERY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a lithium titanate flexible self-supporting composite electrode and its preparation method, aiming to solve the problem that traditional electrodes are difficult to apply in flexible lithium ion batteries

Method used

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  • Lithium titanate flexible self-supporting composite electrode and preparation method thereof
  • Lithium titanate flexible self-supporting composite electrode and preparation method thereof
  • Lithium titanate flexible self-supporting composite electrode and preparation method thereof

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preparation example Construction

[0025] Another aspect of the embodiments of the present invention provides a method for preparing a lithium titanate flexible self-supporting composite electrode, comprising the following steps:

[0026] S01. Provide an inorganic titanium source, a lithium source, a solution containing hydroxide ions and hydrogen peroxide, and mix and process to prepare a lithium-containing titanium peroxide complex solution;

[0027] S02. Adding a hydrophilic carbon material into the lithium-containing titanium peroxide complex solution, and directly forming or forming a self-supporting precursor material after hydrothermal reaction;

[0028] S03. After the self-supporting precursor material is dried, it is calcined in a reducing atmosphere to prepare a lithium titanate flexible self-supporting composite electrode.

[0029] The preparation method of the lithium titanate flexible self-supporting composite electrode provided in the embodiment of the present invention uses the inorganic titanium...

Embodiment approach

[0041] As a preferred embodiment, the hydrophilic carbon material is graphene oxide or hydrophilic carbon nanotubes, and the step of preparing the self-supporting precursor material using graphene oxide or hydrophilic carbon nanotubes includes: The lithium-containing titanium peroxide complex solution is added to the graphene oxide or hydrophilic carbon nanotubes, and after dispersion treatment, hydrothermal reaction is carried out.

[0042] As another preferred embodiment, the hydrophilic carbon material is hydrophilic carbon cloth, and the step of preparing the self-supporting precursor material by using hydrophilic carbon cloth includes: adding lithium-containing titanium peroxide complex The solution is added to the hydrophilic carbon cloth for hydrothermal reaction to directly prepare a self-supporting precursor material.

[0043] Further, after the hydrothermal reaction, further treatment is carried out in combination with the type of hydrophilic carbon material.

[004...

Embodiment 1

[0051] A preparation method of lithium titanate flexible self-supporting composite electrode, comprising the following steps:

[0052] (1) Mix commercial P25 as a titanium source with a concentration of 0.43M lithium hydroxide (LiOH) solution, control the value of Li / Ti to 4.3:1, transfer to a temperature-controllable stirrer coupled with an ultrasonic generator, Sonicate for 10 minutes.

[0053] (2) adding concentration in the stirrer described in step (1) is 30wt% hydrogen peroxide (H 2 o 2 ), the addition amount is 1.1ml per 10ml of lithium hydroxide (LiOH) solution, heat the stirrer to 25°C, and stir for 24 hours to dissolve the solid to form a titanium peroxide complex solution.

[0054] (3) Add graphene oxide in the complex solution described in step (2), the addition is 0.35g / 1g Ti 4+ , after ultrasonic dispersion for 10 minutes, transfer to a reaction vessel with stirring function, and react at 150° C. for 6 hours with the stirring function turned off.

[0055] (4)...

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Abstract

The invention provides a preparation method of a flexible self-supporting composite electrode of lithium titanate, which comprises the following steps: providing an inorganic titanium source, a lithium source, a solution containing hydroxide ions and hydrogen peroxide, and mixing to prepare a solution containing lithium titanium peroxide complex. A lithium-containing titanium peroxide complex solution is added with a hydrophilic carbon material, and after hydrothermal reaction, a self-supporting precursor material is directly for or prepared by molding treatment. A lithium titanate flexible self-supporting composite electrode is prepared by drying self-supporting precursor material and calcine in a reducing atmosphere.

Description

technical field [0001] The invention belongs to the technical field of flexible electrodes, in particular to a lithium titanate flexible self-supporting composite electrode and a preparation method thereof. Background technique [0002] The development of science and technology continues to lead and change the way of life of human beings. From smartphones to iwatches to sports bracelets, the rapid development of many electronic products has greatly improved people's sense of experience and convenience in daily life. In addition to having high intelligence, high integration and other performance characteristics, electronic products are also increasingly developing in the direction of humanization and comfort, such as small, light, thin, bendable, and foldable. This has also prompted the rapid development of flexible smart wearable electronics. For flexible smart wearable electronic products, one of the core components is a flexible energy storage device, which must have the ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M4/131H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M4/362H01M4/485H01M4/62H01M4/625H01M10/0525Y02E60/10
Inventor 朱坤旭曹宝健王建君吴志文
Owner SHENZHEN BAK POWER BATTERY CO LTD
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