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Hard carbon negative electrode material for high-performance lithium ion power battery, and preparation method and application of hard carbon negative electrode material

A negative electrode material and power battery technology, applied in the field of electrochemistry, can solve problems such as unsatisfactory continuous high-current discharge capacity, and achieve the effects of good electrochemical performance, simple preparation method, and mild and controllable conditions

Active Publication Date: 2016-02-24
SHANDONG YUHUANG NEW ENERGY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The specific capacity of graphite anode materials has reached the limit, and cannot meet the continuous high-current discharge capacity required by large-scale power batteries, etc.

Method used

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  • Hard carbon negative electrode material for high-performance lithium ion power battery, and preparation method and application of hard carbon negative electrode material
  • Hard carbon negative electrode material for high-performance lithium ion power battery, and preparation method and application of hard carbon negative electrode material
  • Hard carbon negative electrode material for high-performance lithium ion power battery, and preparation method and application of hard carbon negative electrode material

Examples

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Embodiment 1

[0030] Weigh 30g of phenolic resin, stir and dissolve in 60mL of absolute ethanol, filter out impurities, add 40g of phosphoric acid to the filtrate while stirring; dry in a 50°C oven. The dried sample was put into a tube furnace, and carbonized at 800 °C for 8 h at a heating rate of 2 °C / min under an argon atmosphere. The carbonized sample was milled in a ball mill at 300 r / min for 8 h, and then passed 300 mesh sieve to obtain the hard carbon negative electrode material.

Embodiment 2

[0032] Weigh 30g of phenolic resin, stir and dissolve in 60mL of absolute ethanol, filter out impurities, add 55g of phosphoric acid to the filtrate while stirring; dry in an oven at 80°C. The dried sample was put into a tube furnace, and carbonized at 1000°C for 5h at a heating rate of 5°C / min under an argon atmosphere. The carbonized sample was milled in a ball mill at 400r / min for 6h, and then passed 400 mesh sieve to obtain the hard carbon negative electrode material.

Embodiment 3

[0034] Weigh 30g of phenolic resin, stir and dissolve in 60mL of absolute ethanol, filter out impurities, add 45g of phosphoric acid to the filtrate while stirring; dry in an oven at 80°C. The dried sample was put into a tube furnace, and carbonized at 1200 °C for 5 h at a heating rate of 8 °C / min under an argon atmosphere. The carbonized sample was ball milled in a ball mill at 800 r / min for 5 h, and then passed 600 mesh sieve to obtain the hard carbon negative electrode material.

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Abstract

The invention discloses a hard carbon negative electrode material for a high-performance lithium ion power battery, and a preparation method and application of the hard carbon negative electrode material, belonging to the field of electrochemistry. The hard carbon negative electrode material disclosed by the invention is doped with phosphorus, the mass ratio of a phosphorus precursor to a hard carbon precursor is (8-11):6, the hard carbon precursor is phenolic resin, the phosphorus precursor is phosphoric acid, and the particle size of the hard carbon negative electrode material ranges from 10 to 50 micrometers. The rate performance of the hard carbon negative electrode material disclosed by the invention is obviously improved, and the hard carbon negative electrode material has wide research prospect in the field of actual application of the power battery.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a hard carbon negative electrode material for high-performance lithium-ion power batteries, a preparation method and application thereof. Background technique [0002] The specific capacity of graphite anode materials has reached the limit, and it cannot meet the continuous high-current discharge capacity required by large-scale power batteries. Therefore, the industry has also begun to turn its attention to non-graphite materials, such as hard carbon and other non-carbon materials. Hard carbon anode materials have many advantages, such as higher specific capacity than graphite anode materials, stable cycle performance, and excellent fast charge and discharge performance. Therefore, the development of hard carbon materials with high rate capacity has become a research hotspot in this field. [0003] Researchers are developing new anode materials for lithium batteries. The invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/587H01M10/0525
CPCH01M4/362H01M4/38H01M4/587H01M10/0525Y02E60/10
Inventor 石永倩唐其伟王瑛王胜伟赵成龙高洪森宋楠楠于恒杰田崇社马运法
Owner SHANDONG YUHUANG NEW ENERGY TECH
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