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A kind of preparation method of nanotube hierarchical structure lithium titanate and its application and product

A technology of structural lithium titanate and hierarchical structure, which is applied in the preparation of environmental protection materials and the energy field, can solve the problems such as the inability to further improve the effective separation and transportation of hierarchical structure materials, and the inability to realize hierarchical structure materials, so as to increase active sites, The effect of increasing the specific surface area

Active Publication Date: 2021-01-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hierarchical structures of lithium titanate, titanic acid, and titanium dioxide reported so far are all granular, and it is impossible to realize a hierarchical structure material with a one-dimensional structure, and it is impossible to further improve the effective separation and transport of electrons by the hierarchical structure material.

Method used

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  • A kind of preparation method of nanotube hierarchical structure lithium titanate and its application and product
  • A kind of preparation method of nanotube hierarchical structure lithium titanate and its application and product
  • A kind of preparation method of nanotube hierarchical structure lithium titanate and its application and product

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Embodiment 1

[0089] according to figure 1 The flow process, under stirring conditions, disperse and dissolve 1 gram of titanyl sulfate in 100 ml of aqueous solution to form a solution, and then slowly dropwise add ammonia water with a concentration of 0.05 moles per liter to the above solution until the solution is neutral, so that titanyl sulfate Gradually and completely hydrolyzed to form a hydrated titanic acid precipitate, and then ultrasonically dispersed the hydrated titanic acid precipitate, washed with deionized water for several times, and centrifuged. Secondly, hydrogen peroxide and lithium hydroxide are dissolved in water to form an aqueous solution with a concentration of lithium hydroxide of 0.7 moles per liter and a volume fraction of hydrogen peroxide of 2.5%. Subsequently, the hydrated titanic acid precipitate after centrifugation was dispersed in 100 ml of the hydrogen peroxide aqueous solution containing lithium hydroxide prepared above, and stirred to form a yellow trans...

Embodiment 2

[0091] Under stirring conditions, disperse and dissolve 2 grams of titanium sulfate in 100 ml of aqueous solution to form a solution, and then slowly add sodium hydroxide with a concentration of 0.10 moles per liter to the above solution until the solution is neutral, so that the titanium sulfate gradually and completely Hydrolyzed to generate hydrated titanic acid precipitate, and then ultrasonically dispersed the hydrated titanic acid precipitate, washed with deionized water for several times, and centrifuged. Secondly, hydrogen peroxide and lithium hydroxide are dissolved in water to form an aqueous solution with a concentration of lithium hydroxide of 0.8 moles per liter and a volume fraction of hydrogen peroxide of 5%. Subsequently, the hydrated titanic acid precipitate after centrifugation was dispersed in 100 ml of the hydrogen peroxide aqueous solution containing lithium hydroxide prepared above, and stirred to form a yellow transparent solution. Next, the above-mentio...

Embodiment 3

[0093]Under stirring conditions, disperse and dissolve 5 grams of titanium tetrachloride in 100 ml of aqueous solution to form a solution, and then slowly add potassium hydroxide with a concentration of 0.10 moles per liter to the above solution until the solution is neutral, so that the tetrachloride Titanium is gradually and completely hydrolyzed to form hydrated titanic acid precipitate, and then the hydrated titanic acid precipitate is ultrasonically dispersed, washed with deionized water for several times, and centrifuged. Secondly, hydrogen peroxide and lithium hydroxide are dissolved in water to form an aqueous solution with a concentration of lithium hydroxide of 0.6 moles per liter and a volume fraction of hydrogen peroxide of 4%. Subsequently, the hydrated titanic acid precipitate after centrifugation was dispersed in 200 ml of the hydrogen peroxide aqueous solution containing lithium hydroxide prepared above, and stirred to form a yellow transparent solution. Next, ...

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Abstract

The invention provides a preparation method of nanotube hierarchical structure lithium titanate, application and products thereof. The preparation method of nanotube hierarchical structure lithium titanate comprises the following steps: S1, dispersing the titanium source in an aqueous hydrogen peroxide solution containing lithium hydroxide, and stirring to obtain a mixed solution; S2, heating and reacting the mixed solution obtained in step S1 to obtain a nanometer Linear structure precursor; S3, separate and dry the nanowire structure precursor obtained in step S2; S4, perform low temperature annealing treatment on the separated and dried nanowire structure precursor; S5, subject step S4 to low temperature The annealed nanowire-like structure precursor is subjected to hydrothermal reaction to obtain nanotube hierarchical structure lithium titanate. The method of the invention has simple preparation process, easy control of process parameters and easy large-scale industrial production.

Description

technical field [0001] The invention relates to the field of preparation of energy and environmental protection materials. Specifically, the invention relates to a preparation method of nanotube hierarchical structure lithium titanate and its application and product. Background technique [0002] Lithium titanate, titanic acid and titanium dioxide have been widely used in the fields of lithium-ion batteries, potassium-ion batteries, sodium-ion batteries, catalysis, photocatalysis, solar cells, photolysis of water, sensing and biology, etc., and are research hotspots in the field of materials . [0003] The application properties of lithium titanate, titanic acid and titanium dioxide materials are closely related to their morphology and structure. Compared with single crystal nanoparticles, one-dimensional linear nanomaterials can reduce the grain boundaries between particles, which is conducive to the transport of carriers in the long axis direction, and has the following c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/00C01G23/047H01M4/485H01M10/0525B82Y40/00B01J20/02B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30C02F101/36C02F101/38
CPCB01J20/0262H01M4/485H01M10/0525B82Y40/00C01G23/00C01G23/005C01G23/047C02F1/281B01J20/28057C02F2101/30C02F2101/308C02F2101/20C02F2101/36C02F2101/38C01P2004/03C01P2004/13C01G23/053C01P2004/16C01G23/003H01M4/366H01M4/62B01J20/06B01J20/28007B01J20/3078B01J20/3085Y02E60/10B82Y30/00C01D15/00C01G23/001
Inventor 金旭李建明刘合焦航王晓琦孙亮刘晓丹
Owner PETROCHINA CO LTD
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