Graphite negative electrode material, lithium ion battery, preparation method and application

A lithium-ion battery, graphite negative electrode technology, applied in the direction of battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of difficult acquisition of added components, complicated preparation process, low compaction density, etc., to achieve improved cycle Performance and capacity play, a wide range of sources, and the effect of easy processing

Pending Publication Date: 2020-06-05
SHANGHAI SHANSHAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a graphite negative electrode material, a lithium ion battery, etc. in view of the defects in the prior art such as low compaction density of graphite negative electrode materials, high production cost, complicated preparation process, and difficult availability of added components. , preparation methods and applications

Method used

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  • Graphite negative electrode material, lithium ion battery, preparation method and application
  • Graphite negative electrode material, lithium ion battery, preparation method and application
  • Graphite negative electrode material, lithium ion battery, preparation method and application

Examples

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Embodiment 1

[0041] The raw mesophase carbon microspheres are crushed and classified in a crushing classifier to obtain F1 material (D50 is 25.6 μm), and 20 kg of F1 material is mixed with anthracite powder (D50 is 15.2 μm) 10 kg, catalyst (SiO 2 ) 1.6kg was alternately added in a cantilever double-helix conical mixer and mixed for 2 hours, then catalyzed graphitization (3000° C.) was carried out for 48 hours, and the composite graphite negative electrode material of the present invention was obtained. The half-cell capacity was 356.3mAh / g, and the initial efficiency was 91.6%. .

Embodiment 2

[0043] The raw mesophase carbon microspheres are crushed and classified in a crushing classifier to obtain F1 material (D50 is 25.6 μm), and 15 kg of F1 material is mixed with anthracite powder (D50 is 19.9 μm) 15 kg, catalyst (Fe 2 o 3 ) 2.5kg was alternately added in a cantilever double-helix conical mixer and mixed for 2 hours, then catalyzed graphitization (3200° C.) was carried out for 48 hours, and the composite graphite negative electrode material of the present invention was obtained. The half-cell capacity was 357.1mAh / g, and the initial efficiency was 93.4%. .

Embodiment 3

[0045] Mesophase carbon microspheres are crushed and classified in a crushing classifier to obtain F1 material (D50 is 20.7 μm), and 10 kg of F1 material is mixed with anthracite powder (D50 is 15.2 μm) 20 kg, catalyst (SnO 2 ) 3.2kg is alternately added in a cantilever double-helix conical mixer and mixed for 1 hour, then catalyzed graphitization (2800° C.) is processed for 36 hours, and the composite graphite negative electrode material of the present invention is obtained. The half-cell capacity is 355.9mAh / g, and the initial efficiency is 92.7%. .

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Abstract

The invention discloses a graphite negative electrode material, a lithium ion battery, a preparation method and application. The preparation method comprises the following step: carrying out graphitization high-temperature treatment on a mixture of mesocarbon microbeads, anthracite powder and a catalyst, wherein the mass ratio of the mesocarbon microbead green pellets to the anthracite powder is 1: 9-8: 1, wherein the particle size D50 of the anthracite powder is 10-20 [mu] m. The graphite negative electrode material prepared by the preparation method disclosed by the invention is high in compaction density, and the energy density of the battery is correspondingly improved.

Description

technical field [0001] The invention belongs to the field of lithium electronic batteries, and in particular relates to a graphite negative electrode material, a lithium ion battery, a preparation method and an application. Background technique [0002] The graphitized product of mesocarbon microspheres is an excellent negative electrode material for lithium-ion batteries. In recent years, lithium-ion batteries have been widely used in mobile phones, notebook computers, digital cameras and portable appliances. Lithium-ion batteries have excellent performances such as high energy density, high working voltage, small size, light weight, no pollution, fast charging and discharging, and long cycle life. They are ideal energy sources for development in the 21st century. Mesocarbon microspheres, as a negative electrode material for lithium-ion secondary batteries, have the characteristics of low potential, good flatness, large specificity, high initial charge and discharge efficie...

Claims

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Application Information

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IPC IPC(8): C01B32/205H01M4/587H01M10/0525
CPCC01B32/205H01M4/587H01M10/0525Y02E60/10
Inventor 谢秋生董爱想陈然刘盼
Owner SHANGHAI SHANSHAN TECH CO LTD
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