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A kind of preparation method of carbon-coated mesoporous lithium titanium phosphate

A technology of carbon-coated mesoporous lithium titanium phosphate and phytic acid, which is applied to electrical components, battery electrodes, circuits, etc., can solve problems such as carbon-coated mesoporous lithium titanium phosphate, and achieve improved electrochemical performance and large Effect of specific surface area and short synthesis route

Active Publication Date: 2017-12-29
济南智和弘盛光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there is no report on carbon-coated mesoporous lithium titanium phosphate in the literature.

Method used

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  • A kind of preparation method of carbon-coated mesoporous lithium titanium phosphate
  • A kind of preparation method of carbon-coated mesoporous lithium titanium phosphate
  • A kind of preparation method of carbon-coated mesoporous lithium titanium phosphate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing carbon-coated mesoporous lithium titanium phosphate, the steps are as follows:

[0042] Add 2.1 mL of tetrabutyl titanate to 50 mL of n-butanol / absolute ethanol mixed solution with a volume ratio of 1:1, stir to dissolve, and obtain a mixed solution A;

[0043] Add 1.48mL of 50wt% phytic acid and 0.15g of lithium hydroxide to 10mL of distilled water, stir to dissolve, and obtain mixed solution B;

[0044] Under the condition of stirring at 100 rpm, add the mixed solution B to the mixed solution A dropwise, and continue to stir for 1 hour to obtain the mixed solution C;

[0045] Suction filter the mixed solution C, and dry the obtained solid in a blast drying oven at 40°C for 10 hours to obtain solid powder D;

[0046] Transfer the solid powder D to a ceramic crucible, place the crucible in a tube furnace, and raise the temperature from room temperature to 750°C under a nitrogen atmosphere, keep it warm for 2 hours, and the heating rate is 5°C min...

Embodiment 2

[0048] A method for preparing carbon-coated mesoporous lithium titanium phosphate, the steps are as follows:

[0049] Add 2 mL of tetraisopropyl titanate to 60 mL of a mixed solution of isobutanol / absolute ethanol with a volume ratio of 4:1, stir to dissolve, and obtain a mixed solution A;

[0050] Add 1.48mL of 50wt% phytic acid and 0.22g of lithium acetate to 10mL of distilled water, stir to dissolve, and obtain mixed solution B;

[0051] Under the condition of stirring at 400 rpm, add the mixed solution B to the mixed solution A dropwise, and continue to stir for 2 hours to obtain the mixed solution C;

[0052] Suction filter the mixture C, and dry the obtained solid in an air-blast drying oven at 80°C for 6 hours to obtain solid powder D;

[0053] Transfer the solid powder D to a ceramic crucible, place the crucible in a tube furnace, and raise the temperature from room temperature to 750 °C under an argon atmosphere, keep it warm for 3 hours, and the heating rate is 5 °C...

Embodiment 3

[0055] A method for preparing carbon-coated mesoporous lithium titanium phosphate, the steps are as follows:

[0056] Add 2 mL of tetraisopropyl titanate to 60 mL of a mixed solution of isobutanol / absolute ethanol with a volume ratio of 3:1, stir to dissolve, and obtain a mixed solution A;

[0057] Add 1.48mL of 50wt% phytic acid and 0.78g of lithium sulfate monohydrate to 10mL of distilled water, stir to dissolve, and obtain mixed solution B;

[0058] Under the condition of stirring at 300 rpm, add the mixed solution B to the mixed solution A dropwise, and continue to stir for 2 hours to obtain the mixed solution C;

[0059] Suction filter the mixture C, and dry the obtained solid in a blast drying oven at 60°C for 6 hours to obtain solid powder D;

[0060] Transfer the solid powder D to a ceramic crucible, place the crucible in a tube furnace, and raise the temperature from room temperature to 750°C under an argon atmosphere, keep it warm for 4 hours, and the heating rate i...

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Abstract

The invention relates to a preparation method of carbon-coated mesoporous lithium titanium phosphate. The preparation method includes the following steps that firstly, titanate is dissolved in a mixed solution of butyl alcohol and absolute ethyl alcohol, and mixed liquor A is obtained; secondly, metal lithium salt and phytic acid are dissolved in distilled water, and mixed liquor B is obtained; thirdly, the mixed liquor B is dripped into the mixed liquor A with stirring at room temperature, stirring continues to be preformed for 1-2 h, and mixed liquor C is obtained; fourthly, the mixed liquor C is subjected to solid-liquid separation, an obtained solid is dried, and solid powder D is obtained; fifthly, the powder D is subjected to heat treatment in inert gas, and carbon-coated lithium titanium phosphate is obtained. Obtained carbon-coated mesoporous lithium titanium phosphate has a large specific surface area and an obvious mesoporous feature, which is beneficial to improving the electrochemical performance of carbon-coated mesoporous lithium titanium phosphate used as a lithium battery electrode material.

Description

technical field [0001] The invention relates to a preparation method of carbon-coated mesoporous lithium titanium phosphate, which belongs to the technical field of preparation of mesoporous materials and lithium battery electrode materials. Background technique [0002] Compared with lead-acid, nickel-cadmium and nickel-metal hydride batteries, rechargeable lithium-ion batteries (referred to as lithium batteries) have the characteristics of high energy density, long cycle life and light weight (N. Alias, A.A. Mohamad, J .Power Sources 274(2015) 237-251.), has been widely used in portable instruments and electronic devices; however, the current organic lithium batteries using organic electrolytes have the disadvantages of flammability, harsh assembly conditions, and high production costs , which limits their application in large-scale energy storage systems (such as electric vehicles, smart grids, etc.) (Xiao, Zeng, Q. Liu, M. Chen, L. Leng, T. Shu, L. Du, H. Song, S. Liao,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62
CPCH01M4/366H01M4/5825H01M4/625H01M2004/021Y02E60/10
Inventor 盖利刚孙家香姜海辉
Owner 济南智和弘盛光电科技有限公司
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