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Lithium-ion battery negative material and preparation method thereof

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as the weak combination of metal oxides and graphene nanosheets, shorten the electron transmission path, overcome poor conductivity, and improve performance superior effect

Inactive Publication Date: 2013-10-09
SUN YAT SEN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a graphene / metal oxide composite for lithium-ion batteries in order to overcome the weak combination of metal oxides and graphene nanosheets in the lithium-ion battery composite negative electrode materials in the prior art. Negative material

Method used

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  • Lithium-ion battery negative material and preparation method thereof
  • Lithium-ion battery negative material and preparation method thereof
  • Lithium-ion battery negative material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] S1. Measure 2.5 milliliters of 37% concentrated hydrochloric acid and dilute to 1 liter of pH value of 1.5, then weigh 10 grams of stannous chloride and dissolve it in the above hydrochloric acid solution. Weigh 20 grams of manganese dioxide, a negative electrode material for lithium-ion batteries, and add it into the above-mentioned acidic tin chloride solution, keep the temperature at 40° C., and stir for 1 hour.

[0055] S2. Filter the above mixture, take the solid part after filtering, then add it to about 1 liter of distilled water and stir evenly, then filter, take the solid part, repeat washing 5 times, until the hydrogen ion concentration index in the distilled water after washing is measured About 7 (PH).

[0056] S3. Weigh 100 mg of graphene and add it to distilled water, set the volume to 100 ml, and then sonicate for 1 hour to obtain a suspension of graphene, and then add the solid substance treated by S2 into it and stir for 30 minutes.

[0057] S4. Use a ...

Embodiment 2

[0061] S1. Prepare 1 liter of acid aqueous solution with a pH value of 4 with nitric acid, then weigh 5 grams of stannous chloride and dissolve it in the above hydrochloric acid solution. Weigh 10 grams of manganese dioxide, a negative electrode material for lithium-ion batteries, and add it into the above-mentioned acidic tin chloride solution, keep the temperature at 30° C., and stir for 0.5 hours.

[0062] S2. Filter the above mixture, take the solid part after filtering, then add it to about 1 liter of distilled water and stir evenly, then filter, take the solid part, repeat washing 5 times, until the hydrogen ion concentration index in the distilled water after washing is measured About 7 (PH).

[0063] S3. Weigh 50 mg of graphene and add it to distilled water, set the volume to 50 ml, and then sonicate for 1 hour to obtain a suspension of graphene, then add the solid substance treated by S2 into it and stir for 10 minutes.

[0064] S4. Use a centrifuge to centrifuge sev...

Embodiment 3

[0066] S1. Take 2 milliliters of 37% concentrated hydrochloric acid and dilute to 2.5 liters, the pH value is 2, then weigh 5 grams of stannous chloride and dissolve it in the above hydrochloric acid solution. Weigh 20 grams of nickel oxide, a lithium-ion battery negative electrode material, and add it into the above-mentioned acidic tin chloride solution, and stir in a water bath with a constant temperature of 40° C. for 1 hour.

[0067] S2. Filter the above mixture, take the solid part after filtering, then add it to about 1 liter of distilled water and stir evenly, then filter, take the solid part, repeat washing 5 times, and measure the hydrogen ion concentration index of the lotion to be about 7 (PH).

[0068] S3. Weigh 100 mg of graphene and add it to distilled water, set the volume to 100 ml, and then sonicate for 1 hour to obtain a suspension of graphene, and then add the solid substance treated by S2 into it and stir for 30 minutes.

[0069] S4. Use a centrifuge to d...

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Abstract

The invention relates to the field of a lithium-ion battery negative material, and particularly discloses a graphene / metal oxide composite negative material of a lithium ion battery and a preparation method of the material. The method comprises the following steps of: S1, placing the metal oxide negative material into a tin salt acid aqueous solution, and stirring at a constant temperature; S2, filtering the mixture, obtaining the solid matters, and washing the solid matters through water; S3, placing the solid matters which are treated in the S2 into a graphene turbid liquid and stirring; S4, centrifugally separating the substance obtained in S3, and drying a centrifugal substrate to obtain a product. The method is simple in preparation process and applicable to the industrialized production, and the graphene and the metal oxide in the prepared graphene / metal oxide composite negative material are closely compounded.

Description

[0001] technical field [0002] The invention relates to the field of negative electrode materials for lithium ion batteries, more specifically, to a graphene / metal oxide composite negative electrode material for lithium ion batteries and a preparation method thereof. Background technique [0003] With the increasingly prominent global energy problems, countries attach great importance to the development and research of a new generation of clean energy, and lithium-ion batteries have attracted much attention as clean energy storage devices. Lithium-ion batteries are a new generation of secondary batteries after lead-acid batteries, nickel-cadmium batteries and nickel-metal hydride batteries. Effect, no environmental pollution and wide operating temperature range, etc., are widely used in mobile phones, laptop computers and other electronic products. Lithium-ion batteries bring more room for development. [0004] Lithium-ion battery anode materials are the key components of...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/62
CPCY02E60/10
Inventor 李奇李高仁童叶翔吴其修唐仁衡肖方明
Owner SUN YAT SEN UNIV
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