Lithium ion battery cathode material carbon microsphere and preparation method thereof

A technology for lithium ion batteries and negative electrode materials, which is applied in battery electrodes, carbon preparation/purification, circuits, etc., can solve the problems of poor cycle performance and rate performance, low energy density of carbon microspheres, and easy agglomeration of carbon microspheres. Achieve the effect of improved rate performance, suitable for large-scale mass production, and high uniformity of morphology

Active Publication Date: 2013-09-04
QINGHAI TAIFENG XIANXING LITHIUM ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to: provide a simple and effective lithium-ion battery negative electrode material carbon microspheres and its preparation method, to overcome the existing technology of carbon microspheres in the existing carbon microsphere materials, which are easy to agglomerate, unevenly dispersed, and have high irreversible capacity Defects, solve the problems of low energy density, poor cycle performance and rate performance of existing carbon microspheres

Method used

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  • Lithium ion battery cathode material carbon microsphere and preparation method thereof
  • Lithium ion battery cathode material carbon microsphere and preparation method thereof

Examples

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Embodiment 1

[0026] At room temperature, add 0.1 g of glucose (2 g / L) and 0.009 g of ferrocene (0.001 mol / L) to 50 ml of acetone, and sonicate until the ferrocene is completely dissolved. Then the solution is added to a solvothermal reaction kettle, put into an oven with a temperature of 180°C, and last for 20 hours; the obtained material is filtered, and washed repeatedly with ethanol ultrasonic waves to obtain a black-gray precipitate; the black-gray precipitate is heated at 80°C Drying at 550° C. under nitrogen atmosphere for 5 hours, and heat treatment at 550° C. for 2 hours; cooling in the furnace, and grinding the heat-treated material to obtain the carbon microsphere material of the present invention.

[0027] Obtained carbon microsphere material is carried out transmission electron microscope observation, the result is as follows figure 1 shown. from figure 1 It can be seen from the figure that the obtained carbon microsphere material has smooth surface, uniform shape, uniform pa...

Embodiment 2

[0030] At room temperature, add 2.0g sucrose (10g / L) and 0.076g cobalt dicene (0.002mol / L) to 200ml ethanol, and sonicate until the cobalt dicene is completely dissolved. Then the solution is added into a solvothermal reaction kettle, put into an oven with a temperature of 200°C, and last for 10 hours; the obtained material is filtered, and washed repeatedly with acetone ultrasonic waves to obtain a black-gray precipitate; the black-gray precipitate is heated at 120°C Drying for 2 hours, and then in argon atmosphere, heat treatment at 450 ° C for 10 hours; cooling with the furnace, grinding the heat-treated material to obtain the carbon microsphere material of the present invention.

Embodiment 3

[0032] At room temperature, in 500ml of acetone, add 25g of phenolic resin (50g / L) and 0.283g of nickelocene (0.003mol / L), sonicate until the nickelocene is completely dissolved. Then the solution is added into the solvothermal reaction kettle, put into an oven with a temperature of 220° C., and continue for 15 hours; the obtained material is filtered, and ultrasonically washed repeatedly with deionized water to obtain a black-gray precipitate; the black-gray precipitate is in Dry at 100°C for 2.5 hours, then heat-treat in a nitrogen atmosphere at 530°C for 4 hours; cool in the furnace, and grind the heat-treated material to obtain the carbon microsphere material of the present invention.

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Abstract

The invention discloses a lithium ion battery cathode material carbon microsphere and a preparation method thereof. The preparation method comprises that in the presence of a catalyst, through optimization of condition factors such as a temperature in a reaction vessel system, time and carbon source kinds, a carbon microsphere intermediate having controllable morphology is obtained, and the carbon microsphere intermediate is sintered into a carbon microsphere sample in an inert atmosphere in a tubular furnace. The preparation method ingeniously and efficiently utilizes raw materials, fills the gap of development of a nano-material in lithium ion battery cathode material preparation, enriches a material preparation method, and effectively solves the problem that the existing carbon cathode material of a lithium ion battery has a high first irreversible capacity and poor rate discharge performances.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery negative electrode materials, and in particular relates to a lithium-ion battery negative electrode material carbon microsphere and a preparation method thereof. Background technique [0002] With the continuous development of science and technology, lithium-ion batteries with small size, light weight, high capacity, low price, long service life and high safety performance are now used in modern life, especially to reduce environmental pollution, improve energy use efficiency and optimize life. levels play an increasingly important role. The development of lithium-ion battery materials, especially anode materials, has now become an important subject of scientific research. [0003] At present, the anode materials of commercial lithium-ion batteries are all carbon materials, such as artificial / natural graphite, petroleum coke, carbon fiber, pyrolytic resin carbon, and mesocarbon micros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02H01M4/587C01B32/05
CPCY02E60/10
Inventor 张卫东周恒辉汪晓雅
Owner QINGHAI TAIFENG XIANXING LITHIUM ENERGY TECH CO LTD
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