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preparation method of nanometer Fe2O3/CoS-AC negative electrode material

A negative electrode material, fe2o3 technology, which is applied in the field of preparation of negative electrode materials for lithium ion batteries, can solve the problems of poor cycle performance, low battery specific capacity, etc., and achieves the effects of low discharge platform, simple preparation process and good conductivity

Inactive Publication Date: 2019-01-22
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a nano Fe 2 o 3 The preparation method of / CoS-AC negative electrode material mainly solves the problems of low specific capacity and poor cycle performance of traditional lithium-ion batteries on the market

Method used

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  • preparation method of nanometer Fe2O3/CoS-AC negative electrode material

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Effect test

Embodiment 1

[0011] 1) Add 48 parts by weight of cobalt nitrate hexahydrate, 200 parts by weight of 75% ethanol solution, and 2 parts by weight of activated carbon into a four-necked flask equipped with a stirrer, a condenser and a thermometer, and stir magnetically for 30 minutes at 150rmp. Add 1 part by weight of thiourea, 14 parts by weight of Fe 3 o 4 / SiO 2 / NiO 2 Composite materials, ultrasonically disperse the mixture for 30min, transfer the solution to a polytetrafluoroethylene reactor at 160°C for 24h, then cool naturally to room temperature, and use 200 parts by weight of absolute ethanol and 200 parts by weight of deionized water to react the liquid Wash and dry in a vacuum oven at 60°C for 12 h to prepare a black powder for later use;

[0012] 2) Weigh 50 parts by weight of the above black powder, fully mix with 2 parts by weight of NaOH, 20 parts by weight of absolute ethanol, and 18 parts by weight of oleic acid, stir at 60°C for 2 hours, and slowly add 1 part by weight of...

Embodiment 2

[0016] Exactly the same as Example 1, the difference is: add 54 parts by weight of cobalt nitrate hexahydrate and 10 parts by weight of Fe 3 o 4 / SiO 2 / NiO 2 composite material.

Embodiment 3

[0018] Exactly the same as Example 1, the difference is: add 42 parts by weight of cobalt nitrate hexahydrate and 18 parts by weight of Fe 3 o 4 / SiO 2 / NiO 2 composite material.

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Abstract

The invention discloses a preparation method of nanometer Fe2O3 / CoS-AC negative electrode material The preparation method of AC cathode material is that cobalt nitrate hexahydrate, activated carbon and KMnO4 are used as main raw materials, Fe3O4 / SiO2 / NiO2 composite material is introduced, and the cathode material with high specific capacity and high rate performance of lithium battery is synthesized by physical compounding. Compared with the traditional electrode material, the novel negative electrode material prepared by the invention can be used as an effective buffer medium to weaken the negative effect of volume change and improve the actual specific capacity and magnification performance of the negative electrode material due to the introduction of the ferromanganese cobalt oxide during charging and discharging.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a lithium ion battery. Background technique [0002] With the rapid development and application of electric vehicles and electronic equipment, people's demand for high-capacity and long-life batteries is increasing day by day. Lithium-ion batteries are called It is the most promising chemical power source, but there are still problems in safety, performance and cost in its practical application and development. At present, commercial anode materials are mainly traditional carbon materials based on graphite, which can be divided into three categories according to their structural characteristics: graphite, easily graphitizable carbon (soft carbon) and difficult graphitizable carbon (hard carbon). However, the theoretical specific capacity of graphite-based anode materials is low (372mAh / g), and the rate performance is limited, which is far from meeting the needs of electr...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/52H01M4/58H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/362H01M4/52H01M4/5815H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 刘新卓士创张永伟
Owner XUZHOU NORMAL UNIVERSITY
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