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Graphene/zinc oxide wrapped solid carbon sphere lithium ion negative electrode plate and preparing method of buckle type lithium ion battery thereof

A lithium ion battery and negative electrode technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, battery electrodes, etc., can solve problems such as effective control of graphene agglomeration, and achieve the effects of low cost, reduced agglomeration, and wide sources.

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

[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 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;

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

Embodiment 2

[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 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;

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

Embodiment 3

[0053] 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:

[0054] S1. preparing solid carbon spheres;

[0055] 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;

[0056] 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;

[0057] 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 wrapped solid carbon sphere lithium ion negative electrode plate and a preparing method of a buckle type lithium ion battery thereof. A solid carbon sphere is introduced into a graphene / zinc oxide material, and the excellent electric conductivity of graphene and the rich porosity structure of the solid carbon sphere are combined and have a synergistic effect; on one hand, polymerization reaction can happen between graphene oxide and the solid carbon sphere, and therefore the bonding effect is achieved between the solid carbon sphere and graphene, and a uniform graphene-solid carbon sphere composite structure can be formed; on the other hand, due to the existence ofthe solid carbon sphere, graphene sheet layers are prevented from being stacked again, and the agglomeration of graphene is effectively reduced.

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 negative electrode sheet and a method for preparing a button-type lithium-ion battery. 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 th...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525H01M10/058
CPCH01M4/364H01M4/48H01M4/625H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 林荣铨
Owner 林荣铨
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