Preparation method of zinc oxide nanoparticle lithium ion battery negative electrode material with high specific capacity

A zinc oxide nano, lithium ion battery technology, applied in battery electrodes, zinc oxide/zinc hydroxide, nanotechnology for materials and surface science, etc. The effect of learning, short diffusion path and small particle size

Active Publication Date: 2017-09-29
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermal evaporation method is not easy to obtain thin film with crystalline structure

Method used

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  • Preparation method of zinc oxide nanoparticle lithium ion battery negative electrode material with high specific capacity
  • Preparation method of zinc oxide nanoparticle lithium ion battery negative electrode material with high specific capacity
  • Preparation method of zinc oxide nanoparticle lithium ion battery negative electrode material with high specific capacity

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 1) Put 13mmol of zinc acetate in 130mL of absolute ethanol, and heat to dissolve at 50°C under magnetic stirring;

[0033] 2) When the zinc acetate is completely dissolved, add absolute ethanol to keep the volume of the solution at 130mL, and cool to 10°C;

[0034] 3) 10 mmol of crystalline lithium hydroxide was dissolved in 130 mL of absolute ethanol at room temperature by magnetic stirring;

[0035] 4) The lithium hydroxide solution obtained in step 3) is added dropwise to the solution of step 2) under stirring, and the dropwise addition is completed in 20 minutes;

[0036] 5) At room temperature, ultrasonically disperse the above mixed solution for 4 days to obtain a white sol;

[0037] 6) centrifuging and cleaning the obtained sol;

[0038] 7) put it into a drying oven, and dry at 60° C. for 24 hours to obtain zinc oxide nanoparticles, that is, zinc oxide nanoparticles lithium ion battery negative electrode material with high specific capacity.

[0039] The prepa...

Embodiment 2

[0044] 1) Put 15mmol of zinc acetate in 100mL of absolute ethanol, and heat to dissolve at 40°C under magnetic stirring;

[0045] 2) When the zinc acetate is completely dissolved, re-dilute to 100mL with absolute ethanol and cool to 10°C;

[0046] 3) 11.5 mmol of crystalline lithium hydroxide was dissolved in 150 mL of absolute ethanol at room temperature by magnetic stirring;

[0047] 4) The lithium hydroxide solution obtained in step 3) was added dropwise to the solution of step 2) under stirring, and the addition was completed in 25 minutes;

[0048] 5) ultrasonically sonicate the above mixed solution for 7 days at room temperature to obtain a white sol;

[0049] 6) centrifuging and cleaning the obtained sol;

[0050] 7) put it into a drying oven, and dry at 60° C. for 24 hours to obtain zinc oxide nanoparticles, that is, zinc oxide nanoparticles lithium ion battery negative electrode material with high specific capacity.

Embodiment 3

[0052] 1) Put 18mmol of zinc acetate in 90mL of absolute ethanol, and heat to dissolve at 75°C under magnetic stirring;

[0053] 2) When zinc acetate is completely dissolved, re-dilute to 90mL with absolute ethanol and cool to 0°C;

[0054] 3) 13.8 mmol of crystalline lithium hydroxide was dissolved in 150 mL of absolute ethanol at room temperature by magnetic stirring;

[0055] 4) The lithium hydroxide solution obtained in step 3) was added dropwise to the solution of step 2) under stirring, and the addition was completed in 25 minutes;

[0056] 5) ultrasonically sonicate the above mixed solution for 4 days at room temperature to obtain a white sol;

[0057] 6) centrifuging and cleaning the obtained sol;

[0058] 7) put it into a drying oven, and dry at 60° C. for 24 hours to obtain zinc oxide nanoparticles, that is, zinc oxide nanoparticles lithium ion battery negative electrode material with high specific capacity.

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Abstract

The invention relates to a preparation method of a zinc oxide nanoparticle lithium ion battery negative electrode material with high specific capacity. The method comprises the following steps: 1, dissolving zinc acetate in anhydrous ethanol at 40-75DEG C; 2, cooling to 0-20DEG C; 3, dissolving lithium hydroxide crystals in anhydrous ethanol at room temperature to obtain a lithium hydroxide solution with the concentration of 0.07-0.2mol / L; 4, adding the solution obtained in step 3 to a solution obtained in step 2 in a dropwise manner, and carrying out ultrasonic dispersion for 1-7d to obtain a sol, wherein a molar ratio of zinc acetate to lithium hydroxide is 1.3:1; and 5, centrifuging the sol obtained in step 4, cleaning, and drying the cleaned sol at 50-100DEG C to obtain zinc oxide nanoparticles. The method has the advantages of simple process, low cost, and avoiding of introduction of outside pollutants in all links of the preparation process. The zinc oxide nanoparticles prepared through the method have good electrochemical performances.

Description

technical field [0001] The invention relates to the preparation of a high specific capacity zinc oxide nano particle lithium ion battery negative electrode material, belonging to the field of nano material preparation and new energy devices. Background technique [0002] Lithium-ion batteries are currently widely used in people's work and life, such as portable electronic products such as mobile phones, digital cameras and notebook computers, electric vehicles, and large-scale energy storage equipment. An important factor affecting the performance of lithium-ion batteries is their electrode materials. At present, the negative electrode materials of commercial lithium-ion batteries generally use graphite. The structure of graphite is stable, and it has a stable reversible capacity in the charge-discharge cycle, but the theoretical specific capacity of the graphite anode material is only 372mAh g -1 , it is difficult to meet the increasingly high energy density requirements o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M10/0525C01G9/02B82Y30/00
CPCB82Y30/00C01G9/02H01M4/483H01M10/0525Y02E60/10
Inventor 张永光李海鹏韦亚琼
Owner HEBEI UNIV OF TECH
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