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Hard carbon negative electrode material

A negative electrode material and hard carbon technology, applied in the field of new energy, can solve the problems of little improvement in important performance such as safety and life, poor comprehensive performance of lithium batteries, and short life, so as to enhance the electronic interaction rate, improve battery performance, The effect of improving discharge capacity

Active Publication Date: 2019-01-22
宁波禾木纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the energy density of lithium-ion batteries using ternary NCM as the positive electrode has reached 250Wh / kg, which is very close to the limit of this material, but the important performances such as safety and life have not improved much, or even declined.
[0007] Aiming at the current disadvantages of poor comprehensive performance and short life of lithium batteries, Publication No. 106784812A improves the preparation method of lithium iron phosphate batteries so that the batteries have the advantages of fast charging and low temperature use
However, the change of the positive electrode still cannot meet the current demand

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Pretreatment: Weigh raw materials according to the above-mentioned negative electrode material, including the following components in parts by weight: 50 parts of vanadium pentoxide, 10 parts of carbon source, 3 parts of boron powder, 3 parts of filler, wherein the carbon source is rhamnose, A mixture of lactose and maltose, the filler is a mixture of tin nitride, silicon nitride and silver chloride, the carbon source is dissolved in water, put into container 1, and vanadium pentoxide is put into container 2;

[0034] Oil-water mixing heat: add 25ml of deionized water to containers 1 and 2 respectively, then add 8 drops of mixed oil of peanut oil, linseed oil and castor oil, put containers 1 and 2 in a closed device, heat to 110°C and keep warm 45s, then pour the solution in container 1 into container 2, add boron powder, continue to heat up to 250°C and keep warm for 1.3h, cool naturally after the reaction is complete, filter and vacuum dry at 90°C for 9h to obtain a se...

Embodiment 2

[0037] Pretreatment: Weigh raw materials according to the above-mentioned negative electrode material, including the following components in parts by weight: 45 parts of vanadium pentoxide, 9 parts of carbon source, 2 parts of boron powder, 1 part of filler, wherein the carbon source is maltose, and the filler For tin nitride, the carbon source is dissolved in water, packed in container 1, and vanadium pentoxide is packed in container 2;

[0038] Oil-water mixing heat: add 25ml of deionized water to containers 1 and 2 respectively, then add 8 drops of mixed oil of peanut oil, linseed oil and castor oil, put containers 1 and 2 in a closed device, heat to 110°C and keep warm 45s, then pour the solution in container 1 into container 2, add boron powder, continue to heat up to 250°C and keep warm for 1.3h, cool naturally after the reaction is complete, filter and vacuum dry at 90°C for 9h to obtain a semi-finished negative electrode material;

[0039]Post-processing: Deposit tin n...

Embodiment 3

[0041] Pretreatment: Weigh raw materials according to the above-mentioned negative electrode material, including the following components in parts by weight: 55 parts of vanadium pentoxide, 11 parts of carbon source, 4 parts of boron powder, and 5 parts of filler, wherein the carbon source is lactose, and the filler For silicon nitride, the carbon source is dissolved in water, packed in container 1, and vanadium pentoxide is packed in container 2;

[0042] Oil-water mixing heat: add 25ml of deionized water to containers 1 and 2 respectively, then add 8 drops of mixed oil of peanut oil, linseed oil and castor oil, put containers 1 and 2 in a closed device, heat to 110°C and keep warm 45s, then pour the solution in container 1 into container 2, add boron powder, continue to heat up to 250°C and keep warm for 1.3h, cool naturally after the reaction is complete, filter and vacuum dry at 90°C for 9h to obtain a semi-finished negative electrode material;

[0043] Post-processing: us...

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Abstract

The invention discloses hard carbon negative electrode material, belonging to the technical field of new energy sources. hard carbon negative electrode material is subjected to processes such as pretreating, oil-water heat mixing and post-treatment. By taking advantage of cheap raw materials, the reaction is carried out by a specific oil-water mixing process, the carbon layer coating of vanadium oxide is realized, The structure stability of vanadium oxide is improved, and the electrode material with excellent performance is obtained. The anode material formed finally has larger layer spacing,which is conducive to the free movement of lithium ions between layers. The nanostructured morphology can shorten the diffusion distance of lithium ions, alleviate the volume change caused by lithiumion deintercalation, and greatly improve the performance of the battery.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a hard carbon negative electrode material. Background technique [0002] A lithium-ion battery that can be charged and used repeatedly is called a lithium secondary battery, and its research and development began in the 1970s and 1980s. In 1991, Sony of Japan successfully produced the world's first rechargeable and commercially available lithium battery, marking the arrival of a new era of energy storage. [0003] In the initial stage of the development of lithium secondary batteries, they were mainly used as backup power sources for electronic products, but after entering the 21st century, lithium ion batteries began to be used more and more for power drive power. Especially since Tesla released the new Model S and Model X in 2012, the Chinese government has taken the opportunity to continuously introduce various policy measures to promote the development of Chin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/485H01M4/624H01M4/625H01M10/0525Y02E60/10
Inventor 李伟力刘伟奇朱意军
Owner 宁波禾木纳米科技有限公司
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