Electrode material with porous hollow nanotube structure and 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 improving contact area.

Active Publication Date: 2020-01-03
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 and preparation method thereof, negative electrode and lithium ion battery
  • Electrode material with porous hollow nanotube structure and preparation method thereof, negative electrode and lithium ion battery
  • Electrode material with porous hollow nanotube structure and preparation method thereof, negative electrode and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of an electrode material with a porous hollow nanotube structure, comprising the steps of:

[0043] S1. Weigh 0.02mol Co(NO 3 )2·6H 2 O, 0.005mol PVP and 0.005mol PEO were dissolved in 30mL deionized water at the same time; in addition, 1mmol hexamethylenetetramine was added to 40mL methanol, stirred until completely dissolved, and the mixed solution of methanol and hexamethylenetetramine was dropped completely Add to the aqueous solution containing cobalt ions and continue to stir for 1h to obtain a mixed solution;

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

[0045] S3. Put the precursor powder prepared in step S2 into a covered porcelain crucible and transfer it to a muffle furnace, calcinate at 300°C for 180 minutes, and coo...

Embodiment 2

[0047] A preparation method of an electrode material with a porous hollow nanotube structure, comprising the steps of:

[0048] S1. Weigh 0.025mol Co(NO 3 ) 2 ·6H 2 O, 0.005mol PVP and 0.005mol PEO were dissolved in 30mL deionized water at the same time; in addition, 1mmol hexamethylenetetramine was added to 20mL methanol, stirred until completely dissolved, and the mixed solution of methanol and hexamethylenetetramine was dropped completely Add to the aqueous solution containing cobalt ions and continue to stir for 1h to obtain a mixed solution;

[0049] S2. Transfer the mixed solution obtained in step S1 to a 150mL round-bottomed flask, reflux at 60°C for 4h, cool to room temperature after the reaction is complete, suction filter the reflux reaction product, and then freeze-dry at -40°C 12h;

[0050] S3. Put the precursor powder prepared in step S2 into a covered porcelain crucible and transfer it to a muffle furnace, calcinate at 500°C for 60 minutes, and cool to room t...

Embodiment 3

[0052] A preparation method of an electrode material with a porous hollow nanotube structure, comprising the steps of:

[0053] S1. Weigh 0.02mol Co(CH 3 COO) 2 4H 2 O, 0.005mol PVP and 0.005mol PEO were 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 dropped completely Add to the aqueous solution containing cobalt ions and continue to stir for 1h to obtain a mixed solution;

[0054] S2. Transfer the mixed solution obtained in step S1 to a 150mL round-bottomed flask, reflux at 80°C for 6h, cool to room temperature after the reaction is complete, filter the reflux reaction product, and then freeze-dry at -40°C 12h;

[0055] S3. Put the precursor powder prepared in step S2 into a covered porcelain crucible and transfer it to a muffle furnace, calcinate at 350°C for 120 minutes, and cool to room temperat...

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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, and more specifically, to an electrode material with a porous hollow nanotube structure and a preparation method thereof, a negative electrode material for a lithium ion battery, and a lithium ion battery. Background technique [0002] Lithium-ion batteries have advantages over traditional secondary batteries (nickel metal hydride and lead-acid batteries, etc.), such as high energy density, high cycle stability, high and stable output voltage, environmental friendliness and pollution-free, etc. It is a new type of energy storage device, which has developed rapidly in recent years and is widely used in mobile portable electronic devices, electric transportation vehicles, and aerospace equipment. Electrode materials are an important part of lithium-ion batteries and determine the performance of batteries. [0003] Transition metal oxide Co 3 o 4 It can obtain a higher discharge specific capac...

Claims

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Application Information

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Patent Type & Authority Applications(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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