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

a fes 2 Synthesis method and battery of composite cathode material

A composite cathode material and a synthesis method technology are applied in the synthesis field of FeS2 composite cathode material, which can solve the problems of hindering industrial development, low discharge performance and high open circuit voltage, and achieve the effects of being beneficial to transmission, high specific capacity and prolonging life.

Active Publication Date: 2020-01-14
东莞市天球实业有限公司 +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the lithium battery using iron disulfide as the positive electrode material has the problems of high open circuit voltage and low discharge performance during discharge, which hinders its further industrial development.

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 fes <sub>2</sub> Synthesis method and battery of composite cathode material
  • a fes <sub>2</sub> Synthesis method and battery of composite cathode material
  • a fes <sub>2</sub> Synthesis method and battery of composite cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment one: a kind of FeS 2 Composite positive electrode material, the composite positive electrode material is coated with FeS by metal powder 2 powder, where the FeS 2 The mass percentage content of the powder is 98%, the mass percentage content of the metal powder is 2%, and the metal powder is zinc powder.

[0026] Its preparation steps are as follows:

[0027] (1) Weighing 1.44g of ferrous oxalate, 3g of thiourea and 0.03g of PVP was dissolved in 50mL of deionized water to form a mixed solution;

[0028] (2) Stir the mixed solution at a constant temperature in a water bath at 60°C for 1 hour, then add 3.72 g of disodium EDTA and 0.96 g of sulfur powder, keep stirring, adjust the pH of the solution to 7 with ammonia water, and form a sol;

[0029] (3) After the sol is formed, it is heated to 70° C. and stirred for 3 hours to obtain a wet gel, which is dried at 120° C. under vacuum for 8 hours to obtain a dry gel;

[0030] (4) Place the obtained xerogel in a ...

Embodiment 2

[0035] Embodiment two: a kind of FeS 2 Composite positive electrode material, the composite positive electrode material is coated with FeS by metal powder 2 powder, where the FeS 2 The mass percentage content of the powder is 98%, the mass percentage content of the metal powder is 2%, and the metal powder is copper powder.

[0036] Its preparation steps are as follows:

[0037] (1) take by weighing the ferrous citrate that quality is 2.68g, the thiourea of ​​1.5g and 0.027gPVP be dissolved in 50mL deionized water and form mixed solution;

[0038] (2) Stir the mixed solution at a constant temperature in a water bath at 55°C for 0.5h, then add 3.84g of citric acid and 1.28g of sulfur powder, keep stirring, adjust the pH of the solution to 7.5 with ammonia water, and form a sol;

[0039] (3) After the sol is formed, it is heated to 80° C. and stirred for 2 hours to obtain a wet gel, which is dried at 140° C. under vacuum for 6 hours to obtain a dry gel;

[0040] (4) Place the...

Embodiment 3

[0044] Embodiment three: a kind of FeS 2 Synthesis method and battery of composite positive electrode material, the composite positive electrode material is coated with FeS by metal powder 2 powder, where the FeS 2 The mass percentage content of the powder is 98%, the mass percentage content of the metal powder is 2%, and the metal powder is silver powder.

[0045] Its preparation steps are as follows:

[0046] (1) Take by weighing 1.74g of ferrous acetate, 2.25g of thiourea and 0.02g of PVP dissolved in 50mL of deionized water to form a mixed solution;

[0047] (2) Stir the mixed solution at a constant temperature in a water bath at 50° C. for 1 hour, then add 3.72 g of disodium EDTA and 0.16 g of sulfur powder, keep stirring, adjust the pH of the solution to 8 with ammonia water, and form a sol;

[0048] (3) After the sol is formed, heat it up to 75°C and stir for 2.5 hours to obtain a wet gel, and dry the obtained wet gel at 130°C under vacuum for 10 hours to obtain a dr...

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

No PUM Login to View More

Abstract

The invention discloses a synthesis method of a FeS2 composite positive electrode material, and a battery. The method comprises the following steps: dispersing a ferrous salt of an organic acid, thiourea, PVP and a chelating agent in a solvent, carrying out a polymerization reaction to form sol, further generating gel, carrying out heat treatment and grinding to prepare FeS2 powder, adding metal powder with the mass percentage of 0.1-2%, and carrying out surface coating in order to obtain the FeS2 composite positive electrode material. The battery comprises the composite positive electrode material synthesized through the method. The synthesized composite positive electrode material has the characteristics of high purity, small particle size, fast ion diffusion rate and high specific capacity, and effectively controls the open circuit voltage of the produced battery to be lower than 1.83 V; and the metal powder is used to coat iron disulfide, so the electric conductivity of the positive electrode material is enhanced, the rate performances are improved, the erosion of an electrolyte to the material is alleviated, the life of the battery is prolonged, and the discharge performance of the battery at a heavy current is effectively improved.

Description

technical field [0001] The invention relates to the technical field of cathode materials for lithium primary batteries, in particular to a FeS 2 Synthesis method and battery of composite cathode material. Background technique [0002] Lithium-iron disulfide battery is a high-energy, light-weight, and environmentally friendly primary lithium battery. It can be used in a wide temperature range and can be used in the temperature range of -40 to 60 ° C. Among them, the low-temperature performance is particularly outstanding, and the energy density is high. The positive electrode material of the battery is two The theoretical capacity of iron sulfide is 890mAh / g, and the capacity of a single AA (No. 5) battery is higher than 3000 mAh. When used in heavy-duty applications, the performance is 4 to 10 times that of ordinary batteries. Currently, it is mainly used in digital products, In electrical appliances such as mobile phones, wireless equipment, medical equipment, game console...

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): H01M4/36H01M4/58H01M4/62H01M6/14
CPCH01M4/362H01M4/5815H01M4/626H01M4/628H01M6/14
Inventor 黄理博
Owner 东莞市天球实业有限公司
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