Graphene/zinc oxide coated solid carbon sphere lithium ion battery negative electrode material and preparation method thereof

A technology for lithium ion batteries and negative electrode materials, which is applied in battery electrodes, circuits, electrical components, etc., can solve problems such as effective control of graphene agglomeration, and achieve the effects of low cost, wide sources, and reduced agglomeration.

Inactive Publication Date: 2018-04-24
林荣铨
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these preparation methods have a common problem, that is, they cannot effectively control the agglomeration of graphene during the preparation of graphene / zinc oxide composites.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a method for preparing a graphene / zinc oxide-coated solid carbon sphere lithium ion battery negative electrode material, comprising the following steps:

[0030] S1. preparing solid carbon spheres;

[0031] S11. Prepare an aqueous glucose solution, then add it to the reactor for hydrothermal reaction, cool naturally after the reaction, centrifuge until the pH reaches 7, then dry, and calcinate the dried product to obtain solid carbon spheres;

[0032] S2. Dissolve graphene in deionized water, add a dispersant, and ultrasonically disperse to obtain a graphene solution, then add zinc nitrate and ammonia water to the graphene solution in sequence, stir evenly in a water bath at 90°C for 2 hours, then add solid carbon spheres, After stirring evenly, transfer it to a high-pressure reactor, and conduct a hydrothermal reaction at 90°C for a reaction time of 6 hours. After the reaction, it is centrifuged and dried;

[0033] S3. Calcining the dried prod...

Embodiment 2

[0037] This embodiment provides a method for preparing a graphene / zinc oxide-coated solid carbon sphere lithium ion battery negative electrode material, comprising the following steps:

[0038] S1. preparing solid carbon spheres;

[0039] S11. Prepare an aqueous glucose solution, then add it to the reactor for hydrothermal reaction, cool naturally after the reaction, centrifuge until the pH reaches 7, then dry, and calcinate the dried product to obtain solid carbon spheres;

[0040] S2. Dissolve graphene in deionized water, add a dispersant, and ultrasonically disperse to obtain a graphene solution, then add zinc nitrate and ammonia water to the graphene solution in sequence, stir evenly in a water bath at 90°C for 4 hours, then add solid carbon spheres, After stirring evenly, transfer it to a high-pressure reactor, and conduct a hydrothermal reaction at 110°C for a reaction time of 16 hours. After the reaction, it is centrifuged and dried;

[0041] S3. Calcining the dried pr...

Embodiment 3

[0045] This embodiment provides a method for preparing a graphene / zinc oxide-coated solid carbon sphere lithium ion battery negative electrode material, comprising the following steps:

[0046] S1. preparing solid carbon spheres;

[0047] S11. Prepare an aqueous glucose solution, then add it to the reactor for hydrothermal reaction, cool naturally after the reaction, centrifuge until the pH reaches 7, then dry, and calcinate the dried product to obtain solid carbon spheres;

[0048] S2. Dissolve graphene in deionized water, add a dispersant, and ultrasonically disperse to obtain a graphene solution, then add zinc nitrate and ammonia water to the graphene solution in sequence, stir evenly in a water bath at 90°C for 6 hours, then add solid carbon spheres, After stirring evenly, transfer it to a high-pressure reactor, and conduct a hydrothermal reaction at 120°C for a reaction time of 24 hours. After the reaction, it is centrifuged and dried;

[0049] S3. Calcining the dried pr...

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Abstract

The invention relates to the technical field of lithium ion negative electrode materials, and discloses a graphene / zinc oxide coated solid carbon sphere lithium ion battery negative electrode materialand a preparation method thereof. The preparation method includes the following steps of S1, preparing a solid carbon sphere; S11, preparing an aqueous glucose solution, adding the solution to a reactor for hydrothermal reaction, after the reaction, naturally cooling, centrifuging to pH of 7, then drying, and calcining the dried product to obtain the solid carbon sphere; S2, dissolving graphene in deionized water, adding a dispersant, performing ultrasonic dispersion to obtain a graphene solution, then successively adding zinc nitrate and ammonia water to the graphene solution, stirring uniformly for 2-6 h in a 90 DEG C water bath, then adding the solid carbon sphere, stirring uniformly, transferring to an autoclave, performing hydrothermal reaction for 6-24 h at 90-120 DEG C, and after the reaction, centrifuging and drying; S3, calcining the dried product to obtain the graphene / zinc oxide coated solid carbon sphere lithium ion battery negative electrode material.

Description

technical field [0001] The invention relates to the technical field of lithium-ion negative electrode materials, and more specifically, to a graphene / zinc oxide-coated solid carbon sphere lithium-ion battery negative electrode material and a preparation method thereof. Background technique [0002] The negative electrode material of lithium-ion batteries is mainly used as the main body of lithium storage, and the intercalation and deintercalation of lithium ions are realized during the charging and discharging process. From the perspective of the development of lithium ions, the research on negative electrode materials plays a decisive role in the emergence of lithium ion batteries. Common lithium-ion battery negative electrode materials, such as graphite negative electrode materials, titanium-based negative electrode materials, etc., but because the potential of graphite negative electrode materials is very close to that of metal lithium electrodes, when the battery is repe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M4/62
CPCH01M4/362H01M4/38H01M4/48H01M4/625Y02E60/10
Inventor 林荣铨
Owner 林荣铨
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