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

A kind of preparation method of porous flower flake lithium battery cathode material

A positive electrode material, lithium battery technology, applied in battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc., can solve the problems of high preparation cost, complicated preparation process, and inability to effectively inhibit polysulfide compounds , to achieve the effect of low preparation temperature, simple preparation method, and inhibition of the formation of polysulfides

Active Publication Date: 2020-11-06
SHANGQIU NORMAL UNIVERSITY
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are copper sulfide lithium battery positive electrode materials prepared by chemical vapor deposition and hydrothermal method, the preparation process is relatively complicated, the preparation cost is high, and most of the obtained flake-like structures need to be coated on the current collector, and Cannot effectively inhibit the formation of polysulfide compounds

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 kind of preparation method of porous flower flake lithium battery cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a porous flower flake lithium battery positive electrode material, comprising the following steps:

[0032] (1) After polishing 0.1g copper foil (thickness 50μm) with No. 0-6 sandpaper in sequence, then ultrasonically clean it with acetone, absolute ethanol, and deionized water, and then put the copper foil into the reaction kettle; Copper chloride hydrate, 0.4g thiourea and 0.05g polyvinylpyrrolidone (PVP) are dissolved in the ethanol of 95% (v / v), make precursor solution, precursor solution is added reactor according to the amount of 60% of reactor volume middle;

[0033] (2) Use a pipette to transfer 1ml of aqueous carbon quantum dot solution with a concentration of 10mg / ml into the reaction kettle, and stir for 20min to mix the precursor solution and aqueous carbon quantum dots evenly;

[0034] (3) After sealing the reaction kettle, put it into a blast drying oven, heat it at 120°C for 5h, wash it with absolute ethanol three times, then wash ...

Embodiment 2

[0038] A method for preparing a porous flower flake lithium battery positive electrode material is prepared by the following steps:

[0039] (1) Soak 0.3g of copper foil (thickness 50μm) in sulfuric acid with a mass fraction of 25% and 3% for 3 minutes, then ultrasonically clean it with acetone, absolute ethanol, and deionized water, and then put the copper foil into the reaction kettle; 0.5g cupric chloride dihydrate, 0.4g thiourea and 0.8g PVP were dissolved in 95% ethanol to obtain a precursor solution, which was added to the reactor according to the amount of 80% of the reactor volume;

[0040] (2) Use a pipette to transfer 2ml of water-phase carbon quantum dot solution with a concentration of 20mg / ml into the reaction kettle, and stir for 60min to mix the precursor solution and water-phase carbon quantum dots evenly;

[0041] (3) After sealing the reaction kettle, put it into a blast drying oven, heat it at 220°C for 72h, wash it with absolute ethanol three times, then wa...

Embodiment 3

[0045] A method for preparing a porous flower flake lithium battery positive electrode material is prepared by the following steps:

[0046] (1) Soak 0.2g of copper foil (thickness 50μm) with 25% and 3% sulfuric acid for 3 minutes, then ultrasonically clean it with acetone, absolute ethanol, and deionized water in sequence, and then put the copper foil into the reaction kettle; 0.5g copper chloride dihydrate, 0.4g thiourea and 0.4g PVP were dissolved in 95% ethanol to prepare a precursor solution, and the precursor solution was added to the reactor according to 70% of the volume of the reactor;

[0047] (2) Use a pipette to transfer 1.5ml of aqueous carbon quantum dot solution with a concentration of 10mg / ml into the reaction kettle, and stir for 30min to mix the precursor solution and aqueous carbon quantum dots evenly;

[0048] (3) After sealing the reaction kettle, put it into a blast drying oven, heat it at 200°C for 12h, wash it with absolute ethanol three times, then was...

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
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method for a porous flower-like lithium battery positive electrode material. A hydrothermal method is used for preparing a porous flower-like lithium battery positive electrode. The preparation method is simple. Compared with a method for preparing a nano flower-like structure in a high vacuum condition or a high temperature condition, the technology has not avacuum degree requirement, does not need the high temperature condition, and is capable of remarkably reducing the preparation cost. In addition, the technology further has the advantages of low device requirements, easy acquisition of reactants, lower preparation temperature, and easy control of reaction conditions and the like. The porous flower-like lithium battery positive electrode materialprepared by the preparation method provided by the invention is directly grown on a current collector, so the good electric contact of the electrode material and the current collector is guaranteed, while the porous flower-like lithium battery positive electrode material is applied to a lithium battery later, the porous flower-like lithium battery positive electrode material is helpful to improvethe performance of the lithium battery. The porous flower-like lithium battery positive electrode material prepared by the preparation method provided by the invention has the specific surface area and charging-discharging performance superior to a cuprous sulfide thin film, and is capable of effectively improving the performance of the lithium battery.

Description

technical field [0001] The invention relates to a method for preparing a porous flower-shaped lithium battery positive electrode material, belonging to the technical field of lithium batteries. Background technique [0002] Lithium-ion batteries have been widely used in the fields of portable electronic devices and aviation and navigation due to their advantages such as high actual working voltage, high mass and volumetric energy density, and stable cycle performance during charge and discharge. However, at present, lithium-ion batteries are still difficult to provide long-distance guarantee for transportation vehicles. Therefore, it is the research work of lithium-ion batteries to study large-scale, high specific energy, low cost, and good safety lithium-ion battery materials that can meet high-load and renewable needs. direction for future efforts. Porous flake cuprous sulfide, because of its Cu + The radius and Li + The radius is relatively close, Cu 2 S and Li 2 The...

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): H01M4/58H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/5815H01M10/0525Y02E60/10
Inventor 李立强焦景轩李莉李飙许俊丽
Owner SHANGQIU NORMAL UNIVERSITY
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