Cathode material and preparation method and application thereof

A cathode material, composite carbon technology, applied in the direction of positive electrode, battery electrode, active material electrode, etc., can solve the problems of low discharge specific capacity, wide band gap, poor conductivity, etc., to improve discharge specific capacity, improve stability, The effect of improving rate performance and cycle performance

Active Publication Date: 2020-04-17
LANGFANG GREEN IND TECH CENT +1
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Normally, the specific energy of a lithium-ion battery is determined by the specific capacity and the working voltage of the battery. In the known periodic table, fluorine has the strongest electronegativity, and the bond strength of the formed ionic bond compound is much higher than that of sulfide. And nitride, so when fluoride is used as the positive electrode material of lithium ion battery, its discharge voltage platform is much higher than that of sulfide and nitride, but because fluoride has strong ionic bonds, wide energy band gap and poor conductivity, it is usually an insulator. This leads to the low discharge specific capacity of fluoride as the cathode material of lithium-ion batteries during use
Therefore, althou

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
  • Cathode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Preparation of nitrogen, phosphorus, sulfur, chlorine in situ co-doped composite carbon materials

[0061] Weigh an appropriate amount of trimeric phosphazene chloride, pyrrole, thiourea, and hexachloro-1,3-butadiene so that the atomic ratio of nitrogen, phosphorus, sulfur, and chlorine is 1:1:3:0.1, and the above materials are mixed Finally, react at 180°C for 12h under high-pressure airtight conditions of 4MPa, cool the reacted product, wash with deionized water three times, and vacuum-dry at 90°C for 12h to obtain the first product. After high temperature treatment for 15 hours, nitrogen, phosphorus, sulfur and chlorine in-situ co-doped composite carbon materials were obtained.

[0062] (2) Preparation of nano titanium oxide sol

[0063] Add tetrabutyl titanate to absolute ethanol solution, and add diethanolamine dropwise while stirring. The molar ratio of tetrabutyl titanate to diethanolamine is 1:1. After fully stirring, add dropwise while stirring Adjust the...

Embodiment 2

[0067] (1) Preparation of nitrogen, phosphorus, sulfur, chlorine in situ co-doped composite carbon materials

[0068] Weigh an appropriate amount of trimeric phosphazene chloride, pyrrole, thiourea, and hexachloro-1,3-butadiene so that the atomic ratio of nitrogen, phosphorus, sulfur, and chlorine is 1:2:1:1, and mix the above substances Finally, react at 180°C for 12h under a high-pressure airtight condition of 4MPa, cool the reacted product, wash with deionized water three times, and vacuum-dry at 90°C for 12h to obtain the first product. After high temperature treatment for 4 hours, nitrogen, phosphorus, sulfur and chlorine in-situ co-doped composite carbon materials were obtained.

[0069] (2) Preparation of nano-titanium oxide sol

[0070] Industrial grade titanium oxysulfate (TiOSO 4 ) dispersed in deionized water, configured into a titanyl sulfate aqueous solution with a mass concentration of 5%, adding an appropriate amount of concentrated sulfuric acid to adjust the...

Embodiment 3

[0074] (1) Preparation of nitrogen, phosphorus, sulfur, chlorine in situ co-doped composite carbon materials

[0075] Weigh an appropriate amount of adenosine diphosphate, pyridine, mercaptan and hexachloro-1,3-butadiene so that the atomic ratio of nitrogen, phosphorus, sulfur and chlorine is 3:1:3:0.5, after the above materials are mixed, in React at 260°C for 2.5h under high-pressure airtight conditions of 3MPa, cool the reacted product, wash with deionized water 4 times, and vacuum-dry at 80°C for 16h to obtain the first product, which is treated at 1000°C in nitrogen After 1h, nitrogen, phosphorus, sulfur, and chlorine in-situ co-doped composite carbon materials were obtained.

[0076] (2) Preparation of nano titanium oxide sol

[0077] Industrial grade titanium oxysulfate (TiOSO 4 ) dispersed in deionized water, configured into an aqueous solution of titanyl sulfate with a mass concentration of 5%, adding an appropriate amount of concentrated sulfuric acid to adjust the...

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
Particle sizeaaaaaaaaaa
Molar concentrationaaaaaaaaaa
Login to view more

Abstract

The invention provides a cathode material and a preparation method and application thereof. The cathode material comprises a composite carbon material, a nano titanium oxide and FeF3(H2O)0.33, the composite carbon material and the titanium oxide coate the surface of the FeF3 (H2O)0.33, and the composite carbon material is a nitrogen, phosphorus, sulfur and chlorine co-doped composite carbon material. The method comprises the following steps: 1) dispersing a nitrogen, phosphorus, sulfur and chlorine co-doped composite carbon material and FeF3(H2O)0.33 in a nano titanium oxide sol, carrying outultrasonic treatment, and carrying out spray drying to obtain a cathode material precursor; and 2) performing microwave treatment to obtain the cathode material. The cathode material provided by the invention has good electrical conductivity and specific discharge capacity, and after the novel cathode material is assembled into a lithium ion battery, the specific discharge capacity of the lithiumion battery is greater than 215mAh/g under 1C multiplying power, and the capacity retention ratio is greater than or equal to 95% after 50 times of circulation, so that the cathode material and the preparation method and the application thereof have a wide application prospect.

Description

technical field [0001] The invention belongs to the field of lithium ion battery positive electrode material preparation technology and lithium ion battery, and relates to a positive electrode material and its preparation method and application. Background technique [0002] Since the beginning of the 21st century, energy shortage and environmental pollution have become severe problems faced by all mankind. With the rapid development of the electronic industry and new energy vehicles, people's demand for various batteries is becoming increasingly urgent. Lithium-ion batteries have outstanding advantages such as large discharge specific capacity, high voltage platform, safety, long life, and environmental friendliness. At present, they are widely used in various fields such as small portable batteries, power batteries for new energy vehicles, and energy storage. The competition in the lithium-ion battery industry is becoming more and more fierce. Finding new electrode materia...

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): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/582H01M4/624H01M4/625H01M4/628H01M10/0525H01M2004/021H01M2004/028Y02E60/10
Inventor 谭强强徐宇兴
Owner LANGFANG GREEN IND TECH CENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap