阅读说明：本技术 一种高温纯化石墨碳烯锂离子电池负极材料及其制备方法 (High-temperature purified graphite carbene lithium ion battery cathode material and preparation method thereof ) 是由 陈新江 赵亮 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种高温纯化石墨碳烯锂离子电池负极材料及其制备方法,其制备过程包括以下步骤：将球形石墨碳烯与包覆材料与溶剂混合,抽真空,脱除溶剂；将所获得的物料进行热聚合；将所获得的物料进行纯化和石墨化获得石墨碳烯锂离子电池负极材料,本发明涉及石墨负极材料制备技术领域,本发明简化了传统石墨锂离子电池负极材料制备工艺,球形石墨碳烯包覆完毕后采用高温石墨化处理,将杂质剔除,取消了化学提纯工艺环节,既减低了生产成本又保护了环境,产品性能明显提高,生产流程简单,利于工业化生产,有效避免了资源的浪费,给石墨负极材料的生产带来了方便。(The invention discloses a high-temperature purified graphene lithium ion battery cathode material and a preparation method thereof, wherein the preparation process comprises the following steps: mixing the spherical graphite carbene with the coating material and a solvent, vacuumizing, and removing the solvent; thermally polymerizing the obtained material; the invention relates to the technical field of graphite cathode material preparation, and discloses a graphite carbene lithium ion battery cathode material which is prepared by purifying and graphitizing the obtained material.)

1. The high-temperature purified graphene lithium ion battery cathode material and the preparation method thereof are characterized in that the preparation process comprises the following steps:

s1, mixing the spherical graphite carbene with the coating material and the solvent, vacuumizing, and removing the solvent;

s2, carrying out thermal polymerization on the material obtained in the step S1;

s3, purifying and graphitizing the material obtained in the step S2 to obtain the graphite carbene lithium ion battery negative electrode material.

2. The high-temperature purified graphene lithium ion battery anode material and the preparation method thereof according to claim 1, wherein the coating material of step S1 comprises any one of coal tar, coal pitch and petroleum pitch.

3. The high temperature purified graphene lithium ion battery anode material and the preparation method thereof as claimed in claim 1, wherein the step S1 is mixing the spherical graphene and the coating material with the solvent at a temperature of 100-350 ℃.

4. The high temperature purified graphene lithium ion battery anode material and the preparation method thereof as claimed in claim 1, wherein the thermal polymerization temperature in step S2 is 400-550 ℃, the polymerization pressure is 0.01-10MPa, and the reaction time is 10-480 minutes.

5. The claim 1 discloses a high temperature purified graphene lithium ion battery anode material and the preparation method thereof according to claim 1, wherein the material obtained in step S2 is subjected to purification and graphitization treatment at a temperature of 2200-3000 ℃ in step S3.

6. The high-temperature purified graphene lithium ion battery negative electrode material according to claim 1, wherein the graphitization treatment is performed under a protective atmosphere in step S3.

7. The high temperature purified graphene lithium ion battery anode material according to claim 1, wherein the protective atmosphere comprises any one of argon, neon or nitrogen.

8. The high temperature purified graphene lithium ion battery negative electrode material according to claim 5, wherein the temperature rise time of the graphitization treatment in the step S3 is 16-52 h.

Technical Field

The invention relates to the technical field of preparation of lithium battery cathode materials, in particular to a high-temperature purified graphite carbene lithium ion battery cathode material and a preparation method thereof.

Background

With the development of society and the progress of times, lithium batteries become indispensable components in life and can be applied to various aspects of daily life of people, wherein graphite materials are widely applied to lithium ion battery cathode materials;

chinese patent CN108807942A discloses a method for preparing a lithium ion negative electrode material by using graphene oxide, comprising the following steps: s1: preparing materials: preparing a graphene oxide raw material and a coating material, wherein the weight ratio of the graphene oxide raw material to the coating material is 75:25-80:20 for later use; s2: grinding: putting the graphene oxide raw material in S1 into grinding equipment for grinding treatment to obtain a primary graphene oxide raw material for later use; s3: and (3) purification: putting the primarily processed graphene oxide raw material in S2 into a purification device for primary graphitization and purification treatment to obtain a purified graphene raw material;

the process can realize the preparation of the graphite cathode material, but the process has the disadvantages of complex flow, complex operation, higher economic cost and inconvenient use.

Disclosure of Invention

The invention aims to provide a high-temperature purified graphene lithium ion battery cathode material and a preparation method thereof, and mainly aims to solve the problems that the existing preparation process is complex and is not beneficial to industrial production.

The technical scheme of the invention is that the high-temperature purified graphite carbene lithium ion battery cathode material and the preparation method thereof are characterized in that the preparation process comprises the following steps:

s1, mixing the spherical graphite carbene with the coating material and the solvent, vacuumizing, and removing the solvent;

s2, carrying out thermal polymerization on the material obtained in the step S1, wherein the thermal polymerization temperature is 400-550 ℃, the polymerization reaction pressure is 0.01-10MPa, and the reaction time is 10-480 minutes;

s3, purifying and graphitizing the material obtained in the step S2 to obtain the graphite carbene lithium ion battery negative electrode material.

Preferably, the coating material of step S1 includes any one of coal tar, coal pitch and petroleum pitch.

Preferably, the spherical graphitic carbene and the coating material are mixed with the solvent at the temperature of 100-350 ℃ in step S1.

Preferably, the thermal polymerization temperature in step S2 is 400-550 ℃, the polymerization pressure is 0.01-10MPa, and the reaction time is 10-480 minutes.

Preferably, in step S3, the material obtained in step S2 is subjected to purification and graphitization treatment at a temperature of 2200-3000 ℃.

Preferably, the graphitization treatment is performed under a protective atmosphere in step S3.

Preferably, the protective atmosphere comprises any one of argon, neon or nitrogen.

Preferably, the temperature rise time of the graphitization treatment in step S3 is 16-52 h.

The invention has the beneficial effects that: the invention simplifies the preparation process of the traditional graphite lithium ion battery cathode material, adopts high-temperature graphitization treatment after the spherical graphite carbene is coated, eliminates impurities, cancels the link of chemical purification process, reduces the production cost, protects the environment, obviously improves the product performance, has simple production flow, is beneficial to industrial production, effectively avoids the waste of resources and brings convenience to the production of the graphite cathode material.

Detailed Description

The present invention will be further described with reference to the following examples.

Example 1: a high-temperature purified graphene lithium ion battery cathode material and a preparation method thereof are disclosed, wherein the preparation process comprises the following steps:

s1, mixing the spherical graphite carbene with a coating material and a solvent at the temperature of 100 ℃, vacuumizing, and removing the solvent, wherein the coating material is coal tar;

s2, carrying out thermal polymerization on the material obtained in the step S1, wherein the thermal polymerization temperature is 400 ℃, the polymerization reaction pressure is 0.01MPa, and the reaction time is 10 minutes;

s3, purifying and graphitizing the material obtained in the step S2 at the temperature of 2200 ℃ to obtain the graphene lithium ion battery cathode material, and graphitizing the material under the protective atmosphere condition, wherein the temperature rise time of the graphitization treatment is 16h, and the protective atmosphere is argon.

Example 2: a high-temperature purified graphene lithium ion battery cathode material and a preparation method thereof are disclosed, wherein the preparation process comprises the following steps:

s1, mixing the spherical graphite carbene with the coating material and the solvent at the temperature of 250 ℃, vacuumizing, and removing the solvent, wherein the coating material is coal pitch;

s2, carrying out thermal polymerization on the material obtained in the step S1, wherein the thermal polymerization temperature is 470 ℃, the polymerization reaction pressure is 05MPa, and the reaction time is 240 minutes;

s3, purifying and graphitizing the material obtained in the step S2 at the temperature of 2600 ℃ to obtain the graphene lithium ion battery cathode material, and graphitizing the graphene lithium ion battery cathode material under the protective atmosphere condition, wherein the temperature rise time of the graphitization treatment is 35 hours, and the protective atmosphere is neon.

Example 3: a high-temperature purified graphene lithium ion battery cathode material and a preparation method thereof are disclosed, wherein the preparation process comprises the following steps:

s1, mixing the spherical graphite carbene with the coating material and the solvent at the temperature of 350 ℃, vacuumizing, and removing the solvent, wherein the coating material is petroleum asphalt;

s2, carrying out thermal polymerization on the material obtained in the step S1, wherein the thermal polymerization temperature is 550 ℃, the polymerization reaction pressure is 10MPa, and the reaction time is 480 minutes;

s3, purifying and graphitizing the material obtained in the step S2 at the temperature of 3000 ℃ to obtain the graphite carbene lithium ion battery negative electrode material, and graphitizing under the condition of protective atmosphere, wherein the temperature rise time of the graphitization is 52h, and the protective atmosphere is nitrogen.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.