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Production method of high-purity Li2ZnTi3O8 nano rod and application of same to lithium battery

A technology of lithium zinc titanate and nanorods, applied in the field of nanomaterials, can solve the problems of poor cycle performance and small electric capacity of lithium storage materials, and achieve the effects of large electric capacity, simple operation and high purity

Inactive Publication Date: 2011-07-27
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the technical problems of the lithium storage material of the lithium-ion battery in the prior art, such as small capacity and poor cycle performance

Method used

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  • Production method of high-purity Li2ZnTi3O8 nano rod and application of same to lithium battery
  • Production method of high-purity Li2ZnTi3O8 nano rod and application of same to lithium battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation steps include: mixing 0.5 g of titanium dioxide powder and 40 ml of caustic soda solution with a concentration of 10 mol / liter, reacting at 160°C for 48 hours, washing the reactant with dilute hydrochloric acid, and mixing the reactant after pickling with lithium carbonate and Grind and mix zinc acetate, the amount of reactants is 0.1 g, the amount of lithium carbonate is 0.05 g, the amount of zinc acetate is 0.073 g, and the mixture is roasted at 550 °C for 7 hours to obtain Li 2 ZnTi 3 o 8 Nano stave.

[0020] Wherein, the concentration of dilute hydrochloric acid used when the reactants are washed with dilute hydrochloric acid is 0.05-0.1 mol / liter; the dosage is 1-2 liters.

[0021] When used in lithium batteries: Lithium battery assembly, by mass ratio: Li 2 ZnTi 3 o 8 Nanorods: polyvinylidene fluoride: acetylene black = 70:10:20, the three materials were mixed and ground and evenly coated on 0.25 cm 2 The copper sheet is used as the positive ...

Embodiment 2

[0025] The preparation steps include: mixing 1.5 grams of titanium dioxide powder and 50 milliliters of caustic soda solution with a concentration of 20 mol / liter, reacting at 200 ° C for 96 hours, washing the reactant with dilute hydrochloric acid, and mixing the reactant after pickling with lithium carbonate and acetic acid Grinding and mixing zinc, the amount of reactants is 0.5 g, the amount of lithium carbonate is 0.25 g, and the amount of zinc acetate is 0.37 g, and the mixture is roasted at 850 °C for 3 hours to obtain Li 2 ZnTi 3 o 8 Nano stave.

[0026] Wherein, the concentration of dilute hydrochloric acid used when the reactants are washed with dilute hydrochloric acid is 0.05-0.1 mol / liter; the dosage is 1-2 liters.

[0027] When used in lithium batteries: Lithium battery assembly, by mass ratio: Li 2 ZnTi 3 o 8 Nanorods: polyvinylidene fluoride: acetylene black = 70:10:20, the three raw materials are mixed and ground and evenly coated on 0.25cm 2 The copper ...

Embodiment 3

[0031] The preparation steps include: mixing 1 gram of titanium dioxide powder with 45 ml of caustic soda solution with a concentration of 15 mol / liter, reacting at 180°C for 80 hours, washing the reactant with dilute hydrochloric acid, and mixing the reactant after pickling with lithium carbonate and acetic acid Grinding and mixing zinc, the amount of reactants is 0.3 g, the amount of lithium carbonate is 0.15 g, and the amount of zinc acetate is 0.22 g, and the mixture is roasted at 600 ° C for 5 hours to obtain Li 2 ZnTi 3 o 8 Nano stave.

[0032] Wherein, the concentration of dilute hydrochloric acid used when the reactants are washed with dilute hydrochloric acid is 0.05-0.1 mol / liter; the dosage is 1-2 liters.

[0033] When used in lithium batteries: Lithium battery assembly, by mass ratio: Li 2 ZnTi 3 o 8Nanorods: polyvinylidene fluoride: acetylene black = 70:10:20, the three materials were mixed and ground and evenly coated on 0.25 cm 2 The copper sheet is used a...

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Abstract

The invention relates to a production method of a nano rod and the application of the same to the lithium battery. The production method of the nano rod comprises the following steps: mixing titanium dioxide powder and caustic soda solution to make the mixture react for 48-96h at 160-200 DEG C, washing the product of reaction with diluted hydrochloric acid, and sintering the product of reaction together with lithium carbonate and lithium acetate to obtain the nano road used for the lithium battery. The Li2ZnTi3O8 can be used for producing the high-purity nano rod which is easy and convenient to operate, has low cost and can be used for synthesizing the lithium battery by a large amount, and the lithium battery adopting the Li2ZnTi3O8 nano rod has the characteristic that the lithium storage material has big capacity, good cycling performance and other excellent performances.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and more specifically relates to a high-purity Li 2 ZnTi 3 o 8 Preparation method of nanorods and their application in lithium batteries. Background technique [0002] The core of lithium-ion batteries is lithium storage materials. Graphite is currently the anode material widely used in commercial Li-ion batteries. However, the lithium intercalation potential of graphite is low, and lithium metal deposition may be caused on the surface of graphite during charging and discharging, which poses certain safety hazards. Recently, spinel Li 4 Ti 5 o 12 And its related titanium oxide compounds have become more promising negative electrode materials due to their good cycle performance, non-toxicity, safety and other advantages. But Li 4 Ti 5 o 12 The theoretical capacity of graphite is only half of that of graphite and its lithium intercalation potential is high, so the development of ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1391H01M4/485H01M10/0525H01M10/058
CPCY02E60/12Y02E60/122Y02E60/10Y02P70/50
Inventor 魏明灯洪振生
Owner FUZHOU UNIV