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Preparation method of Super P/CoO self-assembled porous nano rodlike composite negative electrode material for lithium-ion battery

A lithium-ion battery, nanorod-like technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of difficult to control the size of loaded CoO particles, complex graphene preparation process, etc., to improve electrical conductivity and structural stability, Uniform morphology and the effect of accelerating electrochemical reaction

Active Publication Date: 2016-09-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of graphene used in this method is complicated, and the particle size of loaded CoO is difficult to control

Method used

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  • Preparation method of Super P/CoO self-assembled porous nano rodlike composite negative electrode material for lithium-ion battery
  • Preparation method of Super P/CoO self-assembled porous nano rodlike composite negative electrode material for lithium-ion battery
  • Preparation method of Super P/CoO self-assembled porous nano rodlike composite negative electrode material for lithium-ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Example 1: A preparation method of Super P / CoO self-assembled porous nano-rod composite lithium-ion battery negative electrode material,

[0022] 1) Take 5ml of analytically pure isopropanolamine and add it to 65ml of deionized water, mix well to form solution A;

[0023] 2) Take 6mmol of Co(NO 3 ) 2 ·6H 2 O, 18 mmol of NH 4 Add F to solution A in sequence under stirring, and then add 0.024g of Super P after the substances in the solution are completely dissolved, and stir magnetically for 20 minutes to obtain suspension B;

[0024] 3) Ultrasonic treatment of the suspension B for 1 h;

[0025] 4) Add the ultrasonically treated suspension B into the reaction kettle, seal the reaction kettle, place it in a homogeneous reactor, heat it from room temperature to 120°C, keep it warm for 5h, and then cool it naturally to room temperature to obtain the suspension C ;

[0026] 5) The suspension C was centrifuged and washed with deionized water and absolute ethanol for 3 ti...

Embodiment 2

[0032]Example 2: A preparation method of Super P / CoO self-assembled porous nano-rod composite lithium-ion battery negative electrode material,

[0033] 1) Take 6ml of analytically pure isopropanolamine and add it to 64ml of deionized water, and mix well to form solution A;

[0034] 2) Take 6mmol of Co(NO 3 ) 2 ·6H 2 O, 20 mmol of NH 4 Add F to solution A sequentially under stirring conditions, and then add 0.06g of Super P after the substances in the solution are completely dissolved, and stir magnetically for 25 minutes to obtain suspension B;

[0035] 3) Ultrasonic treatment of the suspension B for 1.5 h;

[0036] 4) Add the ultrasonically treated suspension B into the reaction kettle, seal the reaction kettle, place it in a homogeneous reactor, heat it from room temperature to 140°C, keep it warm for 6h, and then cool it naturally to room temperature to obtain the suspension C ;

[0037] 5) The suspension C was centrifuged and washed with deionized water and absolute ...

Embodiment 3

[0039] Embodiment 3: A kind of preparation method of Super P / CoO self-assembled porous nano-rod composite lithium-ion battery negative electrode material,

[0040] 1) Take 7ml of analytically pure isopropanolamine and add it to 63ml of deionized water, mix well to form solution A;

[0041] 2) Take 6mmol of Co(NO 3 ) 2 ·6H 2 O, 22 mmol of NH 4 F is added in the solution A successively under the condition of stirring, after the substance in the solution is completely dissolved, add 0.072g of Super P, stir magnetically for 30min to obtain the suspension B;

[0042] 3) Ultrasonic treatment of the suspension B for 2 hours;

[0043] 4) Add the ultrasonically treated suspension B into the reaction kettle, seal the reaction kettle, place it in a homogeneous reactor, heat it from room temperature to 160°C, keep it warm for 7h, and then cool it naturally to room temperature to obtain the suspension C ;

[0044] 5) The suspension C was centrifuged and washed with deionized water an...

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Abstract

The invention provides a preparation method of a Super P / CoO self-assembled porous nano rodlike composite negative electrode material for a lithium-ion battery. Conductive carbon black Super P with excellent conductivity is utilized as a carbon material compounded with CoO, so that the preparation process is relatively simple; and improvement of the conductivity and the structure stability of the CoO negative electrode material is achieved more efficiently. The self-assembled porous nano rodlike CoO / Super P composite is obtained through combination of a hydrothermal method and thermal treatment; the lithium ion intercalation / deintercalation distances is greatly reduced by nanoscale CoO particles and the one-dimensional rodlike structure; the electrochemical reaction rate is improved; the specific surface area of the material is increased by the porous structure; active sites of electrochemical reaction and the contact area of the electrode material and an electrolyte are increased; and quick and effective electrochemical reaction is facilitated. Due to these structural characteristics, the lithium storage capacity of the CoO / Super P composite is increased; the rate capability is improved; and the preparation method has important significance for research and development of the negative electrode material for the lithium-ion battery.

Description

technical field [0001] The invention relates to a preparation method of a lithium ion battery negative electrode material, in particular to a preparation method of a Super P / CoO self-assembled porous nanorod composite lithium ion battery negative electrode material. Background technique [0002] Lithium-ion battery is a kind of portable, green, high-energy and environment-friendly chemical power source with the highest specific energy at present. Lithium-ion batteries have the advantages of high voltage, large specific energy, stable discharge voltage, light weight, and long storage and working life. They have been widely used in various portable electronic devices, medical and aviation fields. At present, graphite is the most widely used commercial lithium-ion battery negative electrode material. Graphite has a two-dimensional layered structure and is a good conductor of electricity, but its theoretical capacity is only 372mAh / g, and it is not easy to charge and discharge q...

Claims

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Application Information

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IPC IPC(8): H01M4/525H01M4/62H01M10/0525
CPCH01M4/525H01M4/625H01M10/0525Y02E60/10
Inventor 曹丽云康倩李嘉胤黄剑锋许占位吴建鹏程娅伊李倩颖
Owner SHAANXI UNIV OF SCI & TECH
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