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Electrode material with porous hollow nanotube structure, preparation method thereof, negative electrode and lithium ion battery

A technology for lithium ion batteries and electrode materials, applied in the field of new energy materials, can solve the problems of lack of performance, complicated material synthesis methods, etc., and achieve the effects of improving rate performance, simple and easy-to-obtain reagents, and enriching pore structure.

Active Publication Date: 2021-03-16
长沙坚冰科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Co with these special morphological structures 3 o 4 The material synthesis method is cumbersome and does not show superior performance in lithium storage

Method used

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  • Electrode material with porous hollow nanotube structure, preparation method thereof, negative electrode and lithium ion battery
  • Electrode material with porous hollow nanotube structure, preparation method thereof, negative electrode and lithium ion battery
  • Electrode material with porous hollow nanotube structure, preparation method thereof, negative electrode and lithium ion battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of electrode material with porous hollow nanotube structure comprises the following steps:

[0043] S1. Weigh 0.02mol CO (no 3 ) 2 ·6H 2 O. 0.005mol PvP and 0.005mol PEO, dissolved in 30ml deionized water at the same time; In addition, 1 mmol of hexamethylene tetramine was added to 40 ml of methanol and stirred until it was completely dissolved. All the mixed solutions of methanol and hexamethylene tetramine were added to the aqueous solution containing cobalt ions and stirred continuously for 1 h to obtain the mixed solution;

[0044] S2. Transfer the mixture obtained in step S1 to a 150ml round bottom flask, reflux at 90 ℃ for 6h, cool to room temperature after the reaction, filter the reflux reaction product, and then freeze-dry at - 40 ℃ for 24h to obtain the precursor powder;

[0045] S3. Put the precursor powder prepared in step S2 into a covered porcelain crucible and transfer it to a muffle furnace, calcine it at 300 ℃ for 180min, and then cool ...

Embodiment 2

[0047] A preparation method of electrode material with porous hollow nanotube structure comprises the following steps:

[0048] S1. Weigh 0.025mol CO (no 3 ) 2 ·6H 2 O. 0.005mol PvP and 0.005mol PEO, dissolved in 30ml deionized water at the same time; In addition, 1mmol hexamethylene tetramine is added to 20ml methanol, stirred until it is completely dissolved, and the mixed solution of methanol and hexamethylene tetramine is added to the aqueous solution containing cobalt ion and stirred continuously for 1h to obtain the mixed solution;

[0049] S2. Transfer the mixture obtained in step S1 to a 150ml round bottom flask, reflux at 60 ℃ for 4h, cool to room temperature after the reaction, filter the reflux reaction product, and then freeze dry at - 40 ℃ for 12h;

[0050] S3. Put the precursor powder prepared in step S2 into a covered porcelain crucible and transfer it to a muffle furnace, calcine it at 500 ℃ for 60min, and then cool it to room temperature after the reaction, so as ...

Embodiment 3

[0052] A preparation method of electrode material with porous hollow nanotube structure comprises the following steps:

[0053] S1. Weigh 0.02mol CO (CH 3 COO) 2 ·4H 2 O. 0.005mol PvP and 0.005mol PEO, dissolved in 30ml deionized water at the same time; In addition, 1mmol hexamethylenetetramine was added to 20ml ethanol, stirred until completely dissolved, and the mixed solution of methanol and hexamethylenetetramine was added to the aqueous solution containing cobalt ion and stirred continuously for 1h to obtain the mixed solution;

[0054] S2. Transfer the mixture obtained in step S1 to a 150ml round bottom flask, reflux at 80 ℃ for 6h, cool to room temperature after the reaction, filter the reflux reaction product, and then freeze dry at - 40 ℃ for 12h;

[0055] S3. Put the precursor powder prepared in step S2 into a covered porcelain crucible and transfer it to a muffle furnace, calcine it at 350 ℃ for 120min, and then cool it to room temperature after the reaction, so as to o...

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Abstract

The invention relates to an electrode material with a porous hollow nanotube structure and a preparation method thereof, a negative electrode and a lithium ion battery. The electrode material is assembled from a plurality of Co3O4 particles, the porosity of the electrode material ranges from 45% to 60%, and the BET specific surface area of the electrode material is 300-400m<2> / g. The electrode material with a porous hollow nanotube structure provided by the invention has a larger specific surface area and rich pore channel structures, so that the contact area of the material and electrolyte isincreased, a large number of electrochemical reaction active sites are provided, transfer of electrons and ions between a solid phase and a liquid phase is facilitated, electrochemical reaction is accelerated, and finally, the rate capability of the material is improved.

Description

technical field [0001] The invention relates to the field of new energy materials, in particular to an electrode material with a porous hollow nanotube structure and a preparation method thereof, a negative electrode material of a lithium-ion battery and a lithium-ion battery. Background technology [0002] Lithium ion battery is a new type of energy storage equipment, which has developed rapidly in recent years and is widely used in mobile portable electronic equipment, electric transportation vehicles and aerospace equipment because of its advantages over traditional secondary batteries (nickel hydrogen and lead-acid batteries, etc.), such as high energy density, high cycle stability, high and stable output voltage, environmental friendliness and no pollution. Electrode material is an important part of lithium-ion battery, which determines the performance of the battery. [0003] Transition metal oxide co 3 O 4 It can obtain a high specific discharge capacity of 890mah / g and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M4/131H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/131H01M4/48H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 朱海廖凯思黄婷裴树岗曾平平刘萱冯卓
Owner 长沙坚冰科技有限责任公司
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