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Preparation method for nanoscale lithium titanate material with high specific capacity

A high specific capacity, nano-scale technology, applied in the direction of titanate, nanotechnology, nanotechnology, etc., can solve the problems of not taking into account performance, etc., to achieve the effect of shortening the processing time, wide selection range, and grain refinement

Active Publication Date: 2014-03-26
上海大学浙江嘉兴新兴产业研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both of these two methods have certain technical defects. While the magnification performance is improved, other performances are often not taken into consideration.

Method used

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  • Preparation method for nanoscale lithium titanate material with high specific capacity
  • Preparation method for nanoscale lithium titanate material with high specific capacity
  • Preparation method for nanoscale lithium titanate material with high specific capacity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of the high specific capacity nanoscale lithium titanate material provided by the present invention comprises the following steps:

[0031] (1) Preparation of liquid A:

[0032] Disperse the titanium compound into 50-500ml of deionized water to obtain liquid A;

[0033] (2) Preparation of liquid B:

[0034] Disperse the lithium compound into 50-500ml of deionized water, wherein the ratio of the amount of lithium in the lithium compound to the amount of titanium in the titanium compound in step (1) is: n Li :n Ti =1:1.0~1.2, you can get liquid B;

[0035] (3) Slowly add liquid B to liquid A, and at the same time carry out magnetic stirring, and stir for 30 minutes to obtain a mixed dispersion;

[0036] (4) Put the mixed dispersion liquid obtained in step (3) into a high-temperature reaction kettle, and then place it in an oven at 120-200°C for 5-24 hours. After washing with deionized water or absolute ethanol, dry at a temperature of 60-120°C ...

Embodiment 2

[0045] The preparation method of the high specific capacity nano-scale lithium titanate material provided in this example is basically the same as that of Example 1, except that:

[0046] (1) Preparation of liquid A:

[0047]Disperse 34ml of tetra-n-butyl titanate in 60ml of deionized water to obtain liquid A;

[0048] (2) Preparation of liquid B:

[0049] 3.8g lithium hydroxide monohydrate is dispersed in 40ml deionized water, wherein, the ratio of the amount of substance of lithium in the compound of lithium to the amount of substance of titanium in the compound of titanium in step (1) is: n Li :n Ti =1:1.11, you can get liquid B;

[0050] (3) Slowly add liquid B to liquid A, and at the same time, carry out magnetic stirring, and stir for 30 minutes to obtain a mixed solution;

[0051] (4) Put the mixed dispersion obtained in step (3) into a high-temperature reactor, and then place it in an oven at 180°C for 24 hours. After the reaction, cool it down to room temperature ...

Embodiment 3

[0060] The preparation method of the high specific capacity nanoscale lithium titanate material provided in this example is basically the same as that of Examples 1 and 2, except that:

[0061] (1) Preparation of liquid A:

[0062] 10g amorphous TiO 2 Disperse in 50ml deionized water to get liquid A;

[0063] (2) Preparation of liquid B:

[0064] 11.6g lithium acetate is dispersed in 50ml deionized water, wherein, the ratio of the amount of substance of lithium in the compound of lithium and the amount of substance of titanium in the compound of titanium in the step (1) is: n Li :n Ti =1:1.11, you can get liquid B;

[0065] (3) Slowly add liquid B to liquid A, and at the same time carry out magnetic stirring, and stir for 30 minutes to obtain a mixed dispersion;

[0066] (4) Put the mixed dispersion obtained in step (3) into a high-temperature reactor, and then place it in an oven at 140°C for 24 hours. After the reaction, cool it down to room temperature naturally, then ...

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Abstract

The invention discloses a preparation method for a nanoscale lithium titanate material with high specific capacity. The preparation method comprises the following steps: (1) preparing a liquid A; (2) preparing a liquid B; (3) under a condition of magnetic stirring, slowly adding the liquid B into the liquid A, so as to obtain a mixed dispersion liquid; (4) putting the mixed dispersion liquid into a high-temperature reaction still, then placing the high-temperature reaction still in a drying oven for reaction, after the reaction, naturally cooling to room temperature, leaching, washing with deionized water and absolute ethyl alcohol, and then drying under a condition that the temperature is 60-120 DEG C so as to obtain a precursor; (5) sintering the precursor for 1-5 hours in anitrogen atmosphere under a condition that the temperature is between 400-1000 DEG C, so as to obtain the nanoscale lithium titanate material; (6) immersing the nanoscale lithium titanate material in an acid solution with the hydrogen ion concentration of 0.01-14mol / L under a condition that the temperature is 20-200 DEG C, then leaching, washing with deionized water and absolute ethyl alcohol, and then drying, so as to obtain the nanoscale lithium titanate material with high specific capacity.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrochemical power source materials, and in particular relates to a preparation method of a nanoscale lithium titanate material with high specific capacity. Background technique [0002] The development of modern civilization and the continuous increase of the world's population have increased the world's demand for energy. With the increasing shortage of traditional primary energy supplies such as coal and oil, and the increasing problems of global warming and ecological environment deterioration caused by fuel energy, energy issues have received more and more attention. Exploring clean and renewable new energy has become one of the important tasks in today's scientific world, and has become a major issue related to the future living conditions of human beings. Among them, supercapacitors and Li-ion batteries have attracted widespread attention due to their excellent performance. Sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485C01G23/00B82Y30/00B82Y40/00
CPCY02E60/122B82Y30/00B82Y40/00C01G23/005H01M4/485Y02E60/10
Inventor 施利毅程崇领刘洪江薛鑫
Owner 上海大学浙江嘉兴新兴产业研究院
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