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Cathode material for lithium-ion power and energy storage battery and preparation method thereof

A technology for energy storage batteries and negative electrode materials, applied in battery electrodes, circuits, electrical components, etc., to achieve the effects of reduced production costs, good anisotropy, and high compaction density

Active Publication Date: 2010-12-15
JIXI BTR GRAPHITE IND PARK CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The negative electrode material of lithium-ion batteries widely used in industry is graphite material, its capacity is only 372mAh / g, and due to the unique layered structure of graphite material, it has limited cycle stability, and graphite material also has a high degree of electrolyte resistance. sensitivity

Method used

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  • Cathode material for lithium-ion power and energy storage battery and preparation method thereof
  • Cathode material for lithium-ion power and energy storage battery and preparation method thereof
  • Cathode material for lithium-ion power and energy storage battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1, 400 grams of coal tar pitch with a softening point of 60 ° C, 2.3 wt % of quinoline insoluble matter of coal tar pitch were added to a 2 L reactor, and 5.6 grams of ferric nitrate was added; with a heating rate of 3 ° C / min, the temperature was raised to 100 ℃, stirred at a stirring rate of 90 rpm for 4 hours; at a heating rate of 5 °C / min, the temperature was raised to 300 °C, and the temperature was kept constant for 2 hours; Generate a pitch product containing mesophase carbon microspheres; add 400g of quinoline to the pitch product containing mesophase carbon microspheres, heat to 160°C at a heating rate of 3°C / min, and stir at a speed of 100 rpm Suction filter with Buchner funnel for 1 hour; and use toluene to continuously extract the residual filter cake after filtration in a Soxhlet extractor until the extract is colorless or light yellow; The balls were cleaned with acetone, and baked in an oven at 100°C for 8 hours; the yield was 30%, and the avera...

Embodiment 2

[0053]Example 2, 400 grams of petroleum pitch with a softening point of 80°C and 3.5 wt% of quinoline insolubles were added to a 2L reaction kettle, and 20 grams of aluminum chloride was added; at a heating rate of 10°C / min, the temperature was raised to 140°C. Stir at a stirring rate of 95 rpm / min for 10 hours; at a heating rate of 10 °C / min, raise the temperature to 340 °C and keep the temperature constant for 1 hour; Pitch product of mesophase carbon microspheres; 2000 grams of coal tar light components (distillation range 150-200°C) are added to the pitch product containing mesophase carbon microspheres, and heated to 120°C at a heating rate of 10°C / min , and stirred at a speed of 80 rev / min for 0.5 hour, and suction-filtered with a Buchner funnel; and used quinoline to continuously extract the residual filter cake after filtration in a Soxhlet extractor until the extract was colorless or light Yellow; the extracted mesophase carbon microspheres were washed with acetone, a...

Embodiment 3

[0054] Example 3, 350 grams of coal tar pitch with a softening point of 110 ° C, 2.3 wt % of quinoline insolubles and 50 g of anthracene oil are added to a 2L reactor, and 30 grams of nickel acetate and 10 grams of cobalt nitrate are added; at 14 ° C / min The heating rate is raised to 160°C, and stirred at a stirring rate of 85 rpm for 12 hours; at a heating rate of 16°C / min, the temperature is raised to 330°C, and the temperature is kept at a constant temperature for 4 hours; at a heating rate of 10°C / min, the temperature is raised to 460 ℃, constant temperature reaction for 6 hours to generate a pitch product containing mesophase carbon microspheres; 800g of pyridine was added to the pitch product containing mesophase carbon microspheres, heated to 120°C at a heating rate of 8°C / min, and heated at 90°C Stir at a speed of rev / min for 2 hours, suction filter with a Buchner funnel; and use pyridine to continuously extract the filter cake remaining after filtration in a Soxhlet ...

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Abstract

The invention discloses a cathode material for a lithium-ion power and energy storage battery and a preparation method thereof, aiming to solve the problem on how to improve the high-magnification charge-discharge property of the battery and how to enable the battery to have good cycle property. The cathode material is obtained by carbonizing asphalt containing a catalyst at 500-1,300 DEG C. The preparation method comprises the following steps of: raising the temperature and the pressure to have a carbonized thermal polycondensation reaction; washing, extracting and then washing; drying to obtain mesophase microbead precursors; and then carbonizing to obtain the cathode material for the lithium-ion power and energy storage battery. Compared with the prior art, the invention reduces the production cost; because the mesophase soft carbon materials obtained by low-temperature carbonization are adopted, the interior of the cathode material is in a turbostratic structure capable of charging and discharging with high power and high current; and the main raw material of the mesophase soft carbon material is asphalt, so that compared with other hard carbons such as the resin type, the plant, and the like, the cathode material has yield improved by 3-5 times, low cost and higher specific capacity.

Description

technical field [0001] The invention relates to a battery negative electrode material and a preparation method thereof, in particular to a soft carbon negative electrode material and a preparation method thereof. Background technique [0002] Due to the increasingly urgent pressure on energy security and environmental protection, many developed countries in the world are competing to develop green energy products, among which the field of power supply represented by energy storage power supply is developing rapidly. The development of power materials as energy storage is also important. The negative electrode material of lithium-ion batteries widely used in industry is graphite material, its capacity is only 372mAh / g, and due to the unique layered structure of graphite material, it has limited cycle stability, and graphite material also has a high degree of electrolyte resistance. sensitivity. Contents of the invention [0003] The purpose of the present invention is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/133H01M4/1393C01B31/02
CPCY02E60/122Y02E60/10
Inventor 岳敏闫慧青黄东邓明华
Owner JIXI BTR GRAPHITE IND PARK CO LTD
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