Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of NiCoOx/graphene lithium ion battery negative electrode material

A lithium-ion battery and negative electrode material technology, applied in battery electrodes, nanotechnology for materials and surface science, negative electrodes, etc., can solve the problems of low performance, poor controllability, and complexity of lithium-ion batteries, and achieve suitable Suitable for large-scale production, easy to control, and the effect of preventing agglomeration

Active Publication Date: 2022-03-04
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the current research on the preparation of nano-Co 3 o 4 There are many methods for battery anode materials with NiO, but these methods are usually complicated, poor controllability, and the prepared Co 3 o 4 Lithium-ion battery performance with NiO is not high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of NiCoOx/graphene lithium ion battery negative electrode material
  • Preparation method of NiCoOx/graphene lithium ion battery negative electrode material
  • Preparation method of NiCoOx/graphene lithium ion battery negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] NiCoO x The preparation of graphene lithium ion battery negative electrode material comprises the following steps:

[0045] (1) 1g Co 5 Ni 15 al 80 The alloy sheet was placed in 10mL of 3M hydrogen peroxide solution, 100mL of 2M sodium hydroxide solution was added, magnetically stirred at 2000rpm, and freely corroded at room temperature 25°C for 8h.

[0046] (2) Take 0.2 g of the corroded material in step (1), place it in 50 mL of ethanol and sonicate for 30 minutes, add 1 mL of aminopropyltrimethoxysilane, stir for 1 hour after sonicating for 30 minutes, centrifuge, and wash with ultrapure water for 3 times to obtain the precursor body.

[0047] (3) Graphene oxide powder was prepared by the hummers method, 20 mg of graphene oxide powder was added into 40 mL of ultrapure water and ultrasonicated for 1 h, then the precursor obtained in step (2) was added, magnetically stirred for 1 h at 25 ° C, and the rotation speed was 2000 rpm.

[0048] (4) Add 50 μL of ammonia w...

Embodiment 2

[0057] NiCoO x The preparation of / graphene lithium-ion battery negative electrode material, step is as follows:

[0058] (1) 1g Co 10 Ni 10 al 80 The alloy sheet was placed in 10mL of 3M hydrogen peroxide solution, 100mL of 2M sodium hydroxide solution was added, magnetically stirred at 2000rpm, and freely corroded at room temperature 25°C for 8h.

[0059] (2) Take 0.2 g of the corroded material in step (1), place it in 50 mL of ethanol and sonicate for 30 minutes, add 1 mL of aminopropyltrimethoxysilane, stir for 1 hour after sonicating for 30 minutes, centrifuge, and wash with ultrapure water for 3 times to obtain the precursor body.

[0060] (3) Graphene oxide powder was prepared by the hummers method, 20 mg of graphene oxide powder was added into 40 mL of ultrapure water and ultrasonicated for 1 h, then the precursor obtained in step (2) was added, magnetically stirred for 1 h at 25 ° C, and the rotation speed was 2000 rpm.

[0061] (4) Add 50 μL of ammonia water with...

Embodiment 3

[0070] NiCoO x The preparation of graphene lithium ion battery negative electrode material comprises the following steps:

[0071] (1) 1g Co 15 Ni 5 al 80 The alloy sheet was placed in 10mL of 3M hydrogen peroxide solution, 100mL of 2M sodium hydroxide solution was added, magnetically stirred at 2000rpm, and freely corroded at room temperature 25°C for 8h.

[0072] (2) Take 0.2 g of the corroded material in step (1), place it in 50 mL of ethanol and sonicate for 30 minutes, add 1 mL of aminopropyltrimethoxysilane, stir for 1 hour after sonicating for 30 minutes, centrifuge, and wash with ultrapure water for 3 times to obtain the precursor body.

[0073] (3) Graphene oxide powder was prepared by the hummers method, 20 mg of graphene oxide powder was added into 40 mL of ultrapure water and ultrasonicated for 1 h, then the precursor obtained in step (2) was added, magnetically stirred for 1 h at 25 ° C, and the rotation speed was 2000 rpm.

[0074] (4) Add 50 μL of ammonia w...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a NiCoOx / graphene lithium ion battery negative electrode material, and belongs to the technical field of lithium battery electrode materials. The preparation method comprises the following steps: firstly, carrying out dealloying treatment on an Al, Co and Ni ternary alloy, sequentially carrying out ultrasonic treatment on an obtained dealloying material in an alcohol solvent and aminopropyltrimethoxysilane to obtain a precursor, then putting the precursor in a graphene oxide dispersion liquid, adding ammonia water, adding citric acid after the reaction is finished, continuing the reaction to obtain an intermediate, and carrying out vacuum drying on the intermediate to obtain the Al-Co-Ni ternary alloy composite material. And then heating the intermediate and preserving heat to obtain the lithium ion battery negative electrode material. The prepared lithium ion battery negative electrode material is of a micro-nano structure, has rich active sites, is large in specific surface area and high in tap density, shows excellent cycling stability and high specific discharge capacity when being used in a lithium ion battery, and can be widely used as the lithium ion battery negative electrode material.

Description

technical field [0001] The invention belongs to the technical field of lithium battery electrode materials, and in particular relates to a preparation method of a NiCoOx / graphene lithium ion battery negative electrode material. Background technique [0002] In the field of lithium-ion battery technology, the current commercial negative electrode materials are mainly graphite materials, but this type of material has many disadvantages, such as: low theoretical specific capacity; short life; low initial charge and discharge efficiency; poor thermal stability, etc. . [0003] Compared with graphite materials, transition metal oxides have become a research hotspot because of their unique lithium storage mechanism and their relatively high reversible specific capacity. Among them, Co 3 o 4 Stable properties and high specific capacity, NiO has high lithium storage capacity and high specific capacity, both of which are metal oxide anode materials that are currently being studied...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/587H01M10/0525B82Y30/00B82Y40/00
CPCH01M4/362H01M4/523H01M4/587H01M10/0525B82Y30/00B82Y40/00H01M2004/027H01M2004/021Y02E60/10
Inventor 李东玮王康王玮杰李勇许冠辰李成龙张作瑞
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com