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Preparation method of silver-loaded titanium dioxide anode material

A technology of titanium dioxide and negative electrode materials, which is applied in the field of preparation of silver-supported titanium dioxide negative electrode materials, can solve the problems of poor conductivity of titanium dioxide, achieve low price, improve poor conductivity, and enhance the effect of electron transmission speed

Active Publication Date: 2015-08-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of silver-loaded titanium dioxide negative electrode material, and the present invention can solve the problem of poor conductivity of titanium dioxide

Method used

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  • Preparation method of silver-loaded titanium dioxide anode material
  • Preparation method of silver-loaded titanium dioxide anode material
  • Preparation method of silver-loaded titanium dioxide anode material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0040] Example 1. A method for preparing a silver-supported titanium dioxide anode material, followed by the following steps:

[0041] 1) Stir 2 ml of deionized water and 0.6 ml of ethylene glycol, and then add 1 g of titanyl sulfate and stir for 2 hours. At this time, the titanyl sulfate is completely dissolved and a clear solution I is obtained.

[0042] 2) Add 0.2 g of polyvinylpyrrolidone to the above solution I, and after stirring for 30 minutes, the polyvinylpyrrolidone is completely dissolved to obtain a light yellow solution II.

[0043] 3). Under vigorous stirring, slowly add 0.5 ml of formamide dropwise (the dropping time is 1 minute) to the solution II obtained in step 2), and perform gel aging at 60°C for 2 hours, and then the obtained gel Dry at 60°C for 12 hours to obtain a dry gel.

[0044] 4). Dissolve 0.2 g of silver nitrate in 20 ml of ethylene glycol to obtain a mixed solution, then add 0.5 g of the dry gel obtained in step 3), stand for 12 hours in a 60℃ water bath...

Embodiment 2

[0047] Example 2. A method for preparing silver-loaded titanium dioxide anode material, which includes the following steps:

[0048] 1) Stir 2 ml of deionized water and 0.6 ml of ethylene glycol, and then add 1 g of titanyl sulfate and stir for 2 hours. At this time, the titanyl sulfate is completely dissolved and a clear solution I is obtained.

[0049] 2) 0.3 g of polyvinylpyrrolidone is added to the above solution I, and the polyvinylpyrrolidone is completely dissolved after stirring for 30 minutes to obtain a light yellow solution II.

[0050] 3). Under vigorous stirring, slowly add 0.5 ml of formamide dropwise (the dropping time is 1 minute) to the solution II obtained in step 2). The gel is aged at 60°C for 2 hours, and then the gel is heated at 60°C. Dry at ℃ for 12 hours to obtain a dry gel.

[0051] 4). Dissolve 0.2 g of silver nitrate in 20 ml of ethylene glycol to obtain a mixed solution, add 0.5 g of the dry gel obtained in step 3), stand for 12 hours in a water bath at 60...

Embodiment 3

[0054] Embodiment 3. A method for preparing silver-supported titanium dioxide anode material, which includes the following steps in sequence:

[0055] 1) Stir 2 ml of deionized water and 0.6 ml of ethylene glycol, and then add 1 g of titanyl sulfate and stir for 2 hours. At this time, the titanyl sulfate is completely dissolved and a clear solution I is obtained.

[0056] 2) Add 0.5 g of polyvinylpyrrolidone to the above-mentioned solution I, and after stirring for 30 minutes, the polyvinylpyrrolidone is completely dissolved to obtain a light yellow solution II.

[0057] 3). Under vigorous stirring, slowly add 0.5 ml of formamide dropwise (the dropping time is 1 minute) to the solution II obtained in step 2). The gel is aged at 60°C for 2 hours, and then the gel is heated at 60°C. Dry at ℃ for 12 hours to obtain a dry gel.

[0058] 4). Dissolve 0.2 g of silver nitrate in 20 ml of ethylene glycol to obtain a mixed solution, then add 0.5 g of the dry gel obtained in step 3), stand for 1...

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Abstract

The invention discloses a preparation method of a silver-loaded titanium dioxide anode material. The preparation method comprises the following steps of 1) stirring deionized water and ethylene glycol, and then adding titanyl sulfate to stir in order to obtain solution I; 2) adding polyvinylpyrrolidone into the solution I; 3) dropping methanamide into the solution II obtained in the step 2) under vigorous stirring, and drying after gel ageing in order to obtain aluminum hydroxide gel; 4) dissolving silver nitrate into alcohol to obtain mixed solution, adding the aluminum hydroxide gel, allowing the mixture to stand for 11-13 hours under the water bath condition of 50-70 DEG C, cleaning by utilizing deionized water, and drying at 50-70 DEG C for 11-13 hours to obtain a black gray block material; and 5) carrying out heat treatment on the black gray block material at 500 DEG C for 3-5 hours and cooling the material to the room temperature in order to obtain the silver-loaded titanium dioxide composite. The composite has the advantage of excellent electrochemical performance.

Description

Technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method for preparing a silver-loaded titanium dioxide anode material. Background technique [0002] As a high-performance energy storage device, lithium-ion batteries are widely used in production and life. With the continuous development of various mobile electronic devices and hybrid vehicles, higher requirements are placed on lithium-ion batteries, and the development of high-performance, Safe and reliable batteries have become the main direction of research on lithium-ion batteries today. Traditional carbon anode materials form a passivation film during charge and discharge, causing irreversible capacity loss. At the same time, lithium dendrites may precipitate during charging and discharging, causing short circuits, which may cause safety problems. Compared with traditional carbon anode materials, titanium dioxide has a higher lithium release platform (about 1.7...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/62H01M10/0525H01M4/36
CPCH01M4/364H01M4/48H01M4/626H01M10/0525Y02E60/10
Inventor 郭兴忠朱文均庄均杰杨辉
Owner ZHEJIANG UNIV
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