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Honeycomb porous hard carbon lithium ion battery negative electrode material and preparation method thereof and lithium ion battery

A lithium-ion battery and anode material technology, which is applied in battery electrodes, carbon preparation/purification, secondary batteries, etc., can solve the problems of low reversible capacity, cumbersome operation, and poor rate cycle performance of hard carbon anode materials

Active Publication Date: 2019-12-17
博尔特新材料(银川)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the methods reported in the literature can synthesize hard carbon negative electrode materials, the methods all have the defects of many synthesis steps and complicated operations, and the obtained hard carbon negative electrode materials have low reversible capacity and poor rate cycle performance. low temperature performance is poor

Method used

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  • Honeycomb porous hard carbon lithium ion battery negative electrode material and preparation method thereof and lithium ion battery
  • Honeycomb porous hard carbon lithium ion battery negative electrode material and preparation method thereof and lithium ion battery
  • Honeycomb porous hard carbon lithium ion battery negative electrode material and preparation method thereof and lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) pulverizing coffee beans to obtain coffee powder with a particle size less than 100 mesh;

[0035] (2) The coffee powder is heated from 20°C to 400°C at a heating rate of 2°C / min in helium, subjected to low-temperature carbonization treatment for 6 hours, then cooled naturally until the temperature of the calcined product is 20°C, and then pulverized to obtain Precursor;

[0036] (3) Disperse 100 parts by weight of the precursor in water, then add 5 parts by weight of polyvinyl alcohol, stir and disperse at a speed of 500 rpm for 6 hours to obtain a slurry, and then dry it to obtain material particles;

[0037] (4) Heat the material particles from 20°C to 900°C at a heating rate of 5°C / min in helium, perform high-temperature carbonization treatment for 10 hours, and then cool naturally until the temperature of the calcined product is 20°C, then pulverize and shake To prepare honeycomb porous hard carbon lithium ion battery negative electrode material A1.

Embodiment 2

[0039] (1) pulverizing coffee beans to obtain coffee powder with a particle size less than 100 mesh;

[0040] (2) Heat the coffee powder from 25°C to 250°C at a heating rate of 2°C / min in argon, perform low-temperature carbonization treatment for 10 hours, then cool naturally until the temperature of the calcined product is 25°C, and then pulverize to obtain Precursor;

[0041] (3) Dispersing 100 parts by weight of the precursor in dichloromethane, then adding 20 parts by weight of asphalt, stirring at a speed of 1000 rpm for 0.5 h to obtain a slurry, followed by drying to obtain material particles;

[0042] (4) Raise the temperature of the material particles from 25°C to 650°C at a rate of 2°C / min in nitrogen, perform high-temperature carbonization treatment for 20 hours, then cool naturally until the temperature of the calcined product is 25°C, then pulverize and compact Prepare honeycomb porous hard carbon lithium ion battery negative electrode material A2.

Embodiment 3

[0044] (1) pulverizing coffee beans to obtain coffee powder with a particle size less than 100 mesh;

[0045] (2) Heating the coffee powder from 30°C to 600°C at a rate of 2°C / min in argon, carbonizing at a low temperature for 2 hours, then cooling naturally until the temperature of the calcined product is 30°C, and then pulverizing to obtain Precursor;

[0046](3) Disperse 100 parts by weight of the precursor in a mixed solvent of ethanol and water with a volume ratio of 1:1, then add 1 part by weight of methyl cellulose, and stir at a speed of 50 rpm for 10 h to prepare a slurry , followed by drying treatment to obtain material particles;

[0047] (4) Raise the temperature of the material particles from 30°C to 1400°C at a rate of 10°C / min in nitrogen, perform high-temperature carbonization treatment for 3 hours, then cool naturally until the temperature of the calcined product is 30°C, then pulverize and compact The honeycomb porous hard carbon lithium ion battery negativ...

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Abstract

The invention discloses a honeycomb porous hard-carbon anode material for a lithium ion battery, a preparation method of the honeycomb porous hard-carbon anode material as well as the lithium ion battery. According to the method, coffee powder is prepared firstly and subjected to low-temperature carbonization in an inert gas, a precursor is prepared and subjected to organic carbon source coating treatment with a solvent and an organic carbon source, material particles are obtained and subjected to high-temperature carbonization, and the honeycomb porous hard-carbon anode material for the lithium ion battery is prepared. The method adopts a simple process and a simple and controllable synthetic route, micro-control of morphology and size of the material is easy, and the prepared honeycomb porous hard-carbon anode material for the lithium ion battery is high in reversible capacity, high in rate property and cycle performance and good in low-temperature performance.

Description

technical field [0001] The invention relates to a new type of energy material, in particular to a honeycomb porous hard carbon lithium-ion battery negative electrode material, a preparation method thereof, and a lithium-ion battery. Background technique [0002] As a new type of high-energy battery, lithium-ion batteries are widely used in small devices such as mobile communication equipment, portable computers, video cameras, cameras, MP3, etc. Electric vehicle (HEV), pure electric vehicle (EV) power supply. Especially with the rapid development of electric vehicles and solar / wind energy storage for lithium-ion batteries, high requirements are placed on the safety, cycle performance, rate performance and high and low temperature performance of lithium-ion batteries. As an important part of lithium-ion batteries, negative electrode materials directly affect the performance of lithium-ion batteries. At present, graphite, as the most widely used carbon-based lithium-ion batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05H01M4/587H01M10/0525
CPCC01P2002/72C01P2004/03C01P2006/12H01M4/587H01M10/0525Y02E60/10
Inventor 侯春平贺超孙永林
Owner 博尔特新材料(银川)有限公司
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