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Preparation method for lithium ion battery anode active material Li2ZnTi3O8

A negative electrode active material and lithium-ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high cost and complicated preparation steps, and achieve the effect of reducing agglomeration and uniform distribution

Inactive Publication Date: 2015-10-28
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of Li with higher specific capacity, good high rate performance and cycle stability 2 ZnTi 3 o 8 Lithium-ion battery anode active material, overcomes the use of high-cost titanium isopropoxide and the preparation of complex TiO 2 Disadvantages such as high cost of nanorods / wires and complicated preparation steps

Method used

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  • Preparation method for lithium ion battery anode active material Li2ZnTi3O8
  • Preparation method for lithium ion battery anode active material Li2ZnTi3O8
  • Preparation method for lithium ion battery anode active material Li2ZnTi3O8

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Embodiment 1

[0029]Weigh 1.8568g of analytically pure zinc acetate, dissolve it in 50mL of organic solvent absolute ethanol, stir to make it fully dissolve to form a transparent liquid, called solution A; then add 5.3586g of analytically pure citric acid solid to solution A to form White flocculent precipitate, magnetically stirred for 0.5-1h, the molar ratio of citric acid to the total cations in the solution is controlled between: citric acid / total cations=1.0-1.5, this liquid phase mixture is called B; Add 0.6281g of analytically pure lithium carbonate, stir for 0.5-1h, then add 8.6792g of analytically pure tetrabutyl titanate liquid dropwise, and magnetically stir for 1-2h to obtain a light yellow transparent liquid mixture, called solution C, continue stirring 0.5-1h; then transfer the solution C to an 80°C constant temperature oil bath with magnetic stirring until it forms a wet gel, bake it in an 80°C forced air drying oven for 24h to make it fully dry, and then grind it in an agate ...

Embodiment 2

[0032] Weigh 1.8568g of analytically pure zinc acetate, dissolve it in 50mL of organic solvent absolute ethanol, stir to make it fully dissolve to form a transparent liquid, called solution A; then add 5.3586g of analytically pure citric acid solid to solution A to form White flocculent precipitate, magnetically stirred for 0.5-1h, the molar ratio of citric acid to the total cations in the solution is controlled between: citric acid / total cations=1.0-1.5, this liquid phase mixture is called B; Add 0.6281g of analytically pure lithium carbonate, stir for 0.5-1h, then add 8.6792g of analytically pure tetrabutyl titanate liquid dropwise, and magnetically stir for 1-2h to obtain a light yellow transparent liquid mixture, called solution C, continue stirring 0.5-1h; then transfer the solution C to an 80°C constant temperature oil bath with magnetic stirring until it forms a wet gel, bake it in an 80°C forced air drying oven for 24h to make it fully dry, and then grind it in an agate...

Embodiment 3

[0034] Weigh 1.8568g of analytically pure zinc acetate, dissolve it in 50mL of organic solvent absolute ethanol, stir to make it fully dissolve to form a transparent liquid, called solution A; then add 5.3586g of analytically pure citric acid solid to solution A to form White flocculent precipitate, magnetically stirred for 0.5-1h, the molar ratio of citric acid to the total cations in the solution is controlled between: citric acid / total cations=1.0-1.5, this liquid phase mixture is called B; Add 0.6281g of analytically pure lithium carbonate, stir for 0.5-1h, then add 8.6792g of analytically pure tetrabutyl titanate liquid dropwise, and magnetically stir for 1-2h to obtain a light yellow transparent liquid mixture, called solution C, continue stirring 0.5-1h; then transfer the solution C to an 80°C constant temperature oil bath with magnetic stirring until it forms a wet gel, bake it in an 80°C forced air drying oven for 24h to make it fully dry, and then grind it in an agate...

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Abstract

The invention relates to a preparation method for a lithium ion battery anode active material Li2ZnTi3O8, and aims at providing a Li2ZnTi3O8 lithium ion battery anode active material which has higher specific capacity and good high-rate performance and cycling stability. According to the technical scheme, tetrabutyl titanate, lithium carbonate, zinc acetate and complexing agents are mixed and stirred according to a certain order, in the gel forming process, mixing of the reactants at the molecular level is facilitated, so that the reactants can make full contact with precursors, and therefore the prepared material has the advantages that the particle size is in the nanometer range, dispersion is uniform, an obvious agglomeration phenomenon does not exist, and piling holes exist among particles. Accordingly, the structural features are beneficial for the development of the high-rate performance and long cycling performance of the active material.

Description

Technical field: [0001] The invention belongs to the field of lithium ion batteries, in particular to a lithium ion battery negative electrode active material Li 2 ZnTi 3 o 8 method of preparation. Background technique: [0002] With the development of electronic consumer products such as smart phones and tablet computers towards large screens, the requirements for the battery life of rechargeable batteries are getting higher and higher. Since Japan's Sony Corporation first commercialized lithium-ion batteries in 1990, lithium-ion batteries have been widely used in various portable electronic devices due to their high output voltage, high energy density, long service life, environmental friendliness, and no memory effect. In addition, lithium-ion batteries can also be used in many fields such as pure electric vehicles, hybrid vehicles, large-scale energy storage systems, and aerospace. For commercialized lithium-ion batteries, graphite-like carbon materials are mostly us...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/1391H01M10/0525
CPCH01M4/1391H01M4/485H01M10/0525Y02E60/10
Inventor 唐致远唐好庆罗加严
Owner TIANJIN UNIV
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