Preparation method of graphite negative electrode material containing hollow carbon nanostructure for lithium ion battery

A lithium-ion battery, carbon nanostructure technology, used in battery electrodes, structural parts, circuits, etc.

Active Publication Date: 2013-01-09
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no better material to meet the future demand for high-performance batteries

Method used

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  • Preparation method of graphite negative electrode material containing hollow carbon nanostructure for lithium ion battery
  • Preparation method of graphite negative electrode material containing hollow carbon nanostructure for lithium ion battery
  • Preparation method of graphite negative electrode material containing hollow carbon nanostructure for lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: Using ethylene tar as the raw material for preparing asphalt, adding nickel nitrate and picric acid (explosive agent) in the tar by mass ratio (adding 5g nickel nitrate and 5g picric acid to 100g ethylene tar), during the heating process in the prepared asphalt During the heating process, the nickel nitrate decomposes (begins to decompose at 110°C), and then continues to heat up, and the picric acid reaches the decomposition temperature (about 300°C) and produces a slight explosion, which makes the nickel oxide more evenly dispersed, and the temperature rises to 420°C. Continue to stir for about 0.5 hour, stop, and finally prepare pitch with uniform dispersion of nano-metal nickel particles. Among them, the mass fraction of metal in the asphalt is 10%, and after being crushed, it is ground through a 100-mesh standard sieve for future use. Select natural flake graphite as the graphite source, wet ball mill through a 100-mesh standard sieve, and set aside. ...

Embodiment 2

[0048] Example 2, using coal tar as the raw material for preparing asphalt, adding nickel nitrate and picric acid (explosive agent) (100g coal tar with 1g nickel nitrate and 5g picric acid) in the coal tar by mass ratio, heating up in the prepared asphalt Stir continuously during the heating process. During the heating process, nickel nitrate decomposes (begins to decompose at 75°C) to obtain nickel oxide. After continuing to heat up, picric acid reaches the decomposition temperature (about 300°C) and produces a slight explosion, which makes the nickel oxide more evenly dispersed. The temperature rises To 420°C, continue to stir for about 0.5 hours, stop, and finally prepare asphalt with uniform dispersion of nano-metal nickel particles. Among them, the mass fraction of metal in the asphalt is 1%, and it is crushed and ground through a 300-mesh standard sieve for future use. Choose natural flake graphite as the graphite source, wet ball mill through a 300-mesh standard sieve,...

Embodiment 3

[0050] Use petroleum residue as the raw material for asphalt preparation, add ferric nitrate and picric acid (explosive agent) in the petroleum residue according to the mass ratio (add 30g ferric nitrate and 5g picric acid to 100g coal tar), during the heating process of the prepared asphalt Stir constantly, ferric nitrate decomposes to iron oxide during the heating process, then continue to heat up, picric acid reaches the decomposition temperature (about 300°C) and produces a slight explosion, which makes the iron oxide more uniformly dispersed, the temperature rises to 420°C, and continues to stir for about 0.5 Hours, stop, and finally modulated into asphalt with uniform dispersion of nano-metal iron particles. Among them, the mass fraction of metal in the asphalt is 20%, and after crushing, it is ground and passed through a 300-mesh standard sieve for future use. Select graphite microcrystals as the graphite source, wet ball milling through a 200-mesh standard sieve, and s...

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Abstract

The invention relates to a preparation method of a graphite negative electrode material containing a hollow carbon nanostructure for a lithium ion battery. The preparation method comprises the following steps of: firstly adopting an explosion method to prepare asphalt doped with nano-metal particles, crushing the asphalt doped with the nano-metal particles to obtain powdered asphalt with the particle size of 60-300 meshes, adopting the powdered asphalt as a binding agent, taking natural graphite as aggregate, uniformly mixing the two by adopting a ball milling way or a mechanical stirring method, and adopting a hot-pressing sintering method to obtain the graphite negative electrode material containing the hollow carbon nanostructure for the lithium ion battery. A catalyst disclosed by the invention has the advantages of high lithium storage capacity, high coulombic efficiency, good cycle performance, excellent rate capability and low cost.

Description

technical field [0001] The invention relates to a preparation method of a lithium ion battery negative electrode material, in particular to a preparation method of a lithium ion battery graphite negative electrode material containing a hollow carbon nanostructure. Background technique [0002] Lithium-ion batteries are rapidly popularized in the field of electronic products such as mobile phones, cameras, and laptop lights due to their high energy density, long cycle life, and no memory effect, and have made some progress in power tools, electric bicycles, and electric vehicles. However, with the continuous development of society, people have higher requirements and expectations for lithium-ion batteries, hoping for larger capacity, higher Coulombic efficiency, better rate performance, and longer life. The improvement of battery performance depends on the development and improvement of electrode materials. Therefore, for a long time, improving the specific capacity of lithi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38
CPCY02E60/12Y02E60/10
Inventor 史景利马灿良赵云李进宋燕郭全贵
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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