Coal-based battery negative electrode material and preparation method and application thereof

A battery negative electrode, coal-based technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of difficult combination of particulate matter, low organic matter content, low material capacity, etc., and achieve good sodium storage characteristics and low heat treatment temperature , the effect of high capacity

Active Publication Date: 2019-07-26
HUNAN JINYE HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the prior art, when anthracite is used as a raw material to prepare battery anode materials, in order to obtain a high degree of graphitization, high-temperature treatment above 2000°C is required, which increases energy consumption; when high-temperature treatment is not performed, the capacity of the material Problems such as lower and lower cond

Method used

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  • Coal-based battery negative electrode material and preparation method and application thereof
  • Coal-based battery negative electrode material and preparation method and application thereof
  • Coal-based battery negative electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] (1) Select coking coal with a volatile content of 15% in the ash-free base, a cohesive index of 65%, a maximum thickness of the colloidal layer of 25%, and a total heteroatom N, P, S and heteroatom content of 5%. As a raw material, 100 g of coking coal raw material dried at 120°C for 12 hours was put into a vibratory pulverizer for crushing for 2 minutes, then ball-milled for 6 hours in a planetary ball mill, sieved with a 325-mesh sieve, and the undersize was taken.

[0071] (2) Add 50 g of dried, crushed and sieved coking coal into a mixed acid solution with a mass ratio of hydrofluoric acid and sulfuric acid of 10:1, the liquid-solid ratio is 3, and the total acid concentration is adjusted to a pH value of 3. The mixture was stirred and reacted for 2 hours, filtered and washed until neutral to obtain coke purified by acid method, and the ash content of the purified coke was 0.4%.

[0072] (3) Get 2g of purified coking coal and 1g of graphene and carbon nanotube mixtu...

Embodiment 2

[0075] (1) Select the coking coal with a volatile content of 20% in the ash-free base, a cohesive index of 70%, a maximum thickness of the colloidal layer of 25%, and a total heteroatom N, P, S and heteroatom content of 10%. As a raw material, 100 g of coking coal raw material dried at 105°C for 12 hours was put into a vibrating pulverizer for crushing for 5 minutes, then ball milled in a planetary ball mill for 10 hours, sieved with a 325-mesh sieve, and the undersize was taken.

[0076] (2) Add 50 g of dried, crushed, and sieved coking coal into a mixed acid solution with a mass ratio of hydrofluoric acid and sulfuric acid of 10:1, the liquid-solid ratio is 5, and the total acid concentration is adjusted to a pH value of 4 at room temperature. The mixture was stirred and reacted for 5 hours, filtered and washed until neutral to obtain coke purified by acid method, and the ash content of the purified coke was 0.3%.

[0077] (3) Get 40g of purified coking coal and 1g of graphe...

Embodiment 3

[0080] (1) Select coking coal with ash-free base volatile content of 25%, cohesive index of 80%, maximum thickness of colloidal layer of 20%, heteroatoms N, P, S and total heteroatom content of 8%. As a raw material, put 100 g of coking coal raw material dried at 120° C. for 10 h into a vibratory pulverizer for crushing for 2 min, then ball mill for 6 h in a planetary ball mill, and sieve with a 325-mesh sieve to obtain the undersize.

[0081] (2) Add 50 g of dried, crushed and sieved coking coal into a mixed acid solution with a mass ratio of hydrofluoric acid and sulfuric acid of 8:1, the liquid-solid ratio is 4, and the total acid concentration is adjusted to a pH value of 3 at room temperature. The mixture was stirred and reacted for 4 hours, filtered and washed until neutral to obtain acid-purified coke, and the ash content of the purified coke was 0.4%.

[0082] (3) Get 40g of purified coking coal and 4g graphene and carbon nanosphere mixture (the mass ratio of graphene ...

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Abstract

The invention relates to the technical field of a battery negative electrode material, and particularly discloses a preparation method of a coal-based battery negative electrode material. The preparation method comprises the steps of mixing soft coal and graphene to obtain a mixed material; performing one-segment sintering on the mixed material under 400-500 DEG C, and then performing two-segmentsintering on the mixed material under 700-1,000 DEG C; and obtaining the coal-based battery negative electrode material. The invention also discloses the negative electrode material prepared by the method and application of the negative electrode material used as a negative electrode of a lithium ion battery or a sodium ion battery. The soft coal is creatively used as a raw material, the raw material is matched with the graphene, and the battery negative electrode with excellent electrical performance can be prepared under a special two-segment sintering mechanism.

Description

technical field [0001] The invention relates to a battery negative electrode material using bituminous coal as a raw material and a preparation method thereof, belonging to the field of battery negative electrode materials. Background technique [0002] As a new type of energy storage element, lithium-ion batteries have the advantages of high energy density, good cycle performance, and environmental protection. They have been widely used in portable devices such as mobile phones, game consoles, and notebook computers. Fields such as new energy grids have good development potential. With the continuous advancement of science and technology, the demand for lithium-ion batteries is also increasing. The corresponding sodium-ion battery is a new generation of energy storage components developed after lithium-ion batteries. It has significant advantages such as high specific capacity, high safety performance, and low price. It also has very broad prospects in the field of energy s...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M10/0525H01M10/054
CPCH01M4/362H01M4/583H01M4/625H01M10/0525H01M10/054Y02E60/10
Inventor 刘晓剑
Owner HUNAN JINYE HIGH TECH CO LTD
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