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

Preparation method of lithium ion battery negative electrode spherical WO3 material with micro-nano hierarchical structure

A lithium-ion battery and hierarchical structure technology, which is applied to battery electrodes, secondary batteries, structural parts, etc., can solve the problems of low charge-discharge specific capacity and poor cycle performance stability, and achieve simple synthesis methods, uniform appearance, and easy The effect of mass production

Active Publication Date: 2016-02-24
HEILONGJIANG UNIV
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the WO synthesized by existing methods 3 Negative electrode materials have the problems of low charge-discharge specific capacity and poor cycle performance stability. To provide a lithium-ion battery negative spherical WO with a micro-nano hierarchical structure 3 Material preparation method

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 lithium ion battery negative electrode spherical WO3 material with micro-nano hierarchical structure
  • Preparation method of lithium ion battery negative electrode spherical WO3 material with micro-nano hierarchical structure
  • Preparation method of lithium ion battery negative electrode spherical WO3 material with micro-nano hierarchical structure

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0012] Specific implementation mode 1: In this implementation mode, a lithium-ion battery negative electrode spherical WO with a micro-nano hierarchical structure 3 The preparation method of the material is as follows: 1. Mix tungsten hexachloride and solvent, stir it magnetically for 20-60 minutes, and prepare a mixed solution with a concentration of 0.01-0.1mol / L; 2. Adjust the pH value of the mixed solution between 2-6 3. Transfer the mixed solution to the reaction kettle, react at a temperature of 120-250°C for 2-48 hours, then wash with anhydrous methanol, and dry in vacuum to obtain a tungsten oxide precursor; 4. Put the tungsten oxide precursor Sintering at 400-800°C for 1-8 hours in an air atmosphere to obtain a lithium-ion battery negative electrode spherical WO with a micro-nano hierarchical structure 3 Material.

[0013] The synthesis method of this embodiment is simple, controllable and easy for large-scale production. The synthesized product is pure phase WO 3 ...

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the solvent in step 1 is methanol, isopropanol or acetic acid. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 1, a mixed solution with a concentration of 0.0286 mol / L is prepared. Others are the same as in the first or second embodiment.

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
First discharge specific capacityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a lithium ion battery negative electrode spherical WO3 material with a micro-nano hierarchical structure, relates to a preparation method of a lithium ion battery negative electrode material and aims to solve the problems of low charge and discharge capacity and poor cycling stability of the WO3 negative electrode material synthesized with an existing method. The method comprises steps as follows: preparation of a tungsten hexachloride mixed solution; adjustment of a pH (potential of hydrogen) value of the mixed solution; preparation of a tungsten oxide precursor; sintering; obtaining of the lithium ion battery negative electrode spherical WO3 material. The material has uniform morphology, better monodispersity, higher charge and discharge capacity and excellent cycling stability. The preparation method is applied to the field of lithium ion battery electrode materials.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a lithium ion battery. Background technique [0002] At present, commercial lithium-ion battery graphite-based anode materials have the disadvantages of low specific capacity and poor safety performance, which cannot meet people's increasing demand for lithium-ion battery performance. WO 3 As an important metal oxide semiconductor material, it has the advantages of good stability, wide sources, and cheap price. When it is used as the negative electrode material of lithium ion battery, its theoretical mass specific capacity is about 700mAh / g, which is far higher than the current commercial lithium ion battery negative electrode graphite material (theoretical specific capacity is 372mAh / g). However, WO synthesized by existing methods 3 Negative electrode materials also have disadvantages such as low charge-discharge specific capacity and poor cycle performance stability....

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
IPC IPC(8): H01M4/1391H01M10/0525
CPCH01M4/1391H01M10/0525Y02E60/10
Inventor 张现发霍丽华童晖徐英明程晓丽高山赵辉
Owner HEILONGJIANG UNIV
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