Unlock instant, AI-driven research and patent intelligence for your innovation.

A core-shell structure composite material containing transition metal phosphate and its construction method and application

A transition metal salt and composite material technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of poor control effect and actual contribution, uncontrollable thickness, uneven coating, etc., and achieve low charge transfer resistance, Excellent stability and the effect of accelerating the diffusion rate

Active Publication Date: 2020-05-26
INST OF CHEM CHINESE ACAD OF SCI +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, common coating methods, such as impregnation, high-energy ball milling, co-precipitation, etc., achieve coatings that are uneven, discontinuous, and the thickness cannot be controlled. Correspondingly, the coating and modification of materials Poor control and actual contribution, so it is important to develop a process that achieves uniform coating

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
  • A core-shell structure composite material containing transition metal phosphate and its construction method and application
  • A core-shell structure composite material containing transition metal phosphate and its construction method and application
  • A core-shell structure composite material containing transition metal phosphate and its construction method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1 Preparation of nickel phosphate-coated polystyrene microsphere composite with uniform core-shell structure

[0052] Add 0.04g of nickel sulfate, 0.04g of ammonium dihydrogen phosphate and 0.5g of precipitant urea into 30mL of polar mixed solvent (20mL of deionized water + 10mL of ethylene glycol) to obtain a light green clear solution, and then add the average particle size 0.1 g of polystyrene microspheres with a diameter of 500 nm, and adjusted to a pH value of about 3 with hydrochloric acid or ammonia water; stirred and refluxed at 80°C for 4 hours, centrifuged, washed, and dried, and the obtained particles were calcined at 300°C for 2 hours. A polystyrene microsphere material coated with nickel phosphate is obtained.

[0053] The polystyrene microsphere composite material coated with nickel phosphate above has a typical core-shell structure, and its transmission electron microscope shows figure 1 shown. The material constituting the core is polystyrene m...

Embodiment 2

[0054] Example 2 Preparation of nickel phosphate-coated phenolic resin microsphere composite with uniform core-shell structure

[0055] Add 0.04g of nickel sulfate, 0.04g of ammonium dihydrogen phosphate and 0.5g of precipitant urea into 30mL of polar mixed solvent (20mL of deionized water + 10mL of ethylene glycol) to obtain a light green clear solution, and then add the average particle size 0.1 g of phenolic resin microspheres (self-made) of 650 nm, and adjusted to a pH value of about 3 with hydrochloric acid or ammonia water; stirred and refluxed at 80 ° C for 4 hours, centrifuged, washed, and dried, and the obtained particles were calcined at 300 ° C for 2 hours, the nickel phosphate-coated phenolic resin microsphere composite material was obtained.

[0056] The above-mentioned phenolic resin microsphere composite material coated with nickel phosphate has a typical core-shell structure, and its transmission electron microscope is as follows: figure 2 shown. The materia...

Embodiment 3

[0057] Example 3 Preparation of Nickel Phosphate-coated Titanium Dioxide Particle Composite Material with Uniform Core-Shell Structure

[0058] Add 0.04g of nickel sulfate, 0.04g of ammonium dihydrogen phosphate and 0.5g of precipitant urea into 30mL of polar mixed solvent (20mL of deionized water + 10mL of ethylene glycol) to obtain a light green clear solution, and then add the average particle size It is 0.3g of titanium dioxide particles of 40nm, and adjusted to a pH value of about 3 with hydrochloric acid or ammonia water; stirred and refluxed at 80°C for 4 hours, centrifuged, washed, and dried, and the obtained particles were calcined at 400°C for 2 hours to obtain nickel phosphate Coated titanium dioxide particle composites.

[0059] The nickel phosphate-coated titanium dioxide particle composite obtained above has a typical core-shell structure, and its transmission electron microscope shows image 3 shown. The material constituting the core is titanium dioxide parti...

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
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a core-shell structure composite material comprising transitional metal phosphate, and a construction method and an application of the composite material. According to the method disclosed in the invention, a transitional metal phosphate uniform shell layer is controllably constructed in a polar mixed solvent; and by adoption of the scheme provided in the invention, construction of the uniform core-shell structure of phosphate on surfaces of different materials can be realized, and the thickness can be controlled to be (1-30nm). By virtue of the core-shell structure composite material comprising transitional metal phosphate provided by the invention, the secondary reaction between a positive electrode active material and an electrolyte can be reduced effectively, lattice distortion, metal dissolving out and the like in a charging-discharging process can be suppressed, and the electrochemical performance of the positive electrode material is obviously improved compared with that of the positive electrode material before treatment.

Description

technical field [0001] The invention belongs to the technical field of preparation of positive electrode materials for lithium batteries, and in particular relates to a method for controllably constructing a transition metal phosphate-containing core-shell structure composite material in a polar mixed solvent and an application thereof. Background technique [0002] The cathode materials of lithium-ion batteries currently used in the market generally have poor conductivity, cycle performance, rate performance and safety, and cannot meet the actual requirements of new energy vehicles for materials. Many studies have shown that the rapid attenuation of the capacity of electrode materials under high voltage is mainly caused by the side reactions between the electrode materials and the electrolyte. The structure of medium lattice distortion is the key to solve the problem of rapid capacity decay of electrode materials under high voltage. [0003] As a special new functional mat...

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 Patents(China)
IPC IPC(8): H01M4/36H01M10/0525
CPCH01M4/362H01M10/0525Y02E60/10
Inventor 曹安民张东万立骏
Owner INST OF CHEM CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com