Check patentability & draft patents in minutes with Patsnap Eureka AI!

Lithium iron phosphate coated with monatomic loaded nitrogen-phosphorus co-doped carbon composite material as well as preparation method and application of lithium iron phosphate

A carbon composite material, lithium iron phosphate technology, which is applied in active material electrodes, electrical components, electrochemical generators, etc. Enhanced coating effect and strong controllability

Active Publication Date: 2022-04-22
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low electronic conductivity and ion diffusion rate of LFP seriously affect the electrochemical performance, making the rate and low temperature performance of LFP at a disadvantage in the competition with ternary lithium batteries.

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
  • Lithium iron phosphate coated with monatomic loaded nitrogen-phosphorus co-doped carbon composite material as well as preparation method and application of lithium iron phosphate
  • Lithium iron phosphate coated with monatomic loaded nitrogen-phosphorus co-doped carbon composite material as well as preparation method and application of lithium iron phosphate
  • Lithium iron phosphate coated with monatomic loaded nitrogen-phosphorus co-doped carbon composite material as well as preparation method and application of lithium iron phosphate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 0.05g tetra-tert-butylporphyrazine (purchased from Aldrich Company), 0.2g manganese chloride tetrahydrate, and 0.01g ammonium molybdate to 10mL 1,2,4-trichlorobenzene successively, and pass into N 2 As a protective gas, heated to 230 ° C, stirred and refluxed for 4 hours. After the reaction, the solvent was removed by distillation under reduced pressure, and the mixed solution of benzene and chloroform with a volume ratio of 10:1 was used as the eluting agent, and silica gel was used as the adsorbent to elute and collect the product to obtain tetra-tert-butylporphyrazine manganese complex thing.

[0017] Mix the prepared tetra-tert-butylporphyrazine manganese complex, lecithin, chloroform and water at a mass ratio of 0.1:1:1:100, stir at 25°C for 4h, and rotate at 200r / min . Subsequently, the obtained mixture was dried at 60° C. for 24 h to obtain a lecithin complex intercalated with manganese tetra-tert-butylporphyrazine complex. Iron phosphate and lithium carbo...

Embodiment 2

[0019] Add 0.05g tetra-tert-butyl porphyrazine (purchased from Aldrich), 0.1g anhydrous zinc chloride, and 0.01g ammonium molybdate to 10mL 1,2,4-trichlorobenzene in sequence, and pass through N 2 As a protective gas, heated to 230 ° C, stirred and refluxed for 4 hours. After the reaction is over, the solvent is removed by distillation under reduced pressure, and the mixed solution of benzene and chloroform with a volume ratio of 10:1 is used as an eluent, and silica gel is used as an adsorbent to elute and collect the product tetra-tert-butylporphyrazine zinc complex .

[0020] Mix the prepared tetra-tert-butylporphyrazine zinc complex with lecithin, chloroform and water at a mass ratio of 0.2:1:1:100, stir at 25°C for 4h, and rotate at 200r / min . Subsequently, the obtained mixture was dried at 80° C. for 24 h to obtain a lecithin complex intercalated with tetra-tert-butylporphyrazine zinc complex. Iron phosphate and lithium hydroxide are mixed in a ratio of 1:1.05, and th...

Embodiment 3

[0022] Add 0.05g tetra-tert-butylporphyrazine (purchased from Aldrich), 0.1g anhydrous copper chloride, and 0.01g ammonium molybdate to 10mL 1,2,4-trichlorobenzene successively, and pass through N 2 As a protective gas, heated to 230 ° C, stirred and refluxed for 4 hours. After the reaction is over, the solvent is removed by distillation under reduced pressure, and the mixed solution of benzene and chloroform with a volume ratio of 10:1 is used as an eluent, and silica gel is used as an adsorbent to elute and collect the product tetra-tert-butylporphyrazine copper complex .

[0023] Mix the prepared tetra-tert-butylporphyrazine copper complex with lecithin, chloroform and water at a mass ratio of 0.1:2:1:100, stir at 25°C for 4h, and rotate at 300r / min . Subsequently, the obtained mixture was dried at 50° C. for 24 h to obtain a lecithin complex intercalated with tetra-tert-butylporphyrazine copper complex. Iron phosphate and lithium acetate are mixed in a ratio of 1:1.03, ...

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 lithium iron phosphate coated with a monatomic loaded nitrogen-phosphorus co-doped carbon composite material as well as a preparation method and application of the lithium iron phosphate. The preparation method of the material comprises the following steps: inserting a tetra-tert-butyl tetra-azaporphyrin metal complex between lecithin layers to obtain a tetra-tert-butyl tetra-azaporphyrin metal complex intercalated lecithin compound; mixing the compound with iron phosphate and a lithium source, and carrying out ball milling treatment to obtain a precursor; and performing step-by-step sintering on the precursor in a protective atmosphere to obtain the monatomic loaded nitrogen-phosphorus co-doped carbon composite material coated lithium iron phosphate. The monatomic loaded nitrogen-phosphorus co-doped carbon composite coating layer is formed by virtue of the synergistic conversion effect of the tetra-tert-butyl tetraazaporphyrin metal complex and the lecithin intercalation material, so that the conjugation degree of pi electrons on a nitrogen-carbon ring can be enhanced, electron transfer can be accelerated, the coating uniformity of the conductive layer can be improved, and the pseudocapacitance effect can be promoted; therefore, the rate and low-temperature performance of the material are improved.

Description

technical field [0001] The invention belongs to the technical field of positive electrode materials for lithium-ion batteries, and relates to lithium iron phosphate coated with a single-atom-loaded nitrogen-phosphorus co-doped carbon composite material and a preparation method and application thereof. Background technique [0002] Lithium iron phosphate (LFP) cathode has unique advantages such as high reversible specific capacity, stable charging and discharging platform, high safety, long cycle life, abundant resources and low price, making it widely used in energy storage systems and electric vehicles (such as buses, It has been widely used in low-speed electric vehicles and other special-purpose vehicles, and has become a new generation of lithium-ion battery cathode materials with the most potential for development and application. LFP is an olivine structure, Li + lies on a straight chain of alternating planar octahedrons, and all Li + Deintercalation can only occur a...

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): H01M4/62H01M4/36H01M4/58H01M10/0525
CPCH01M4/62H01M4/624H01M4/625H01M4/366H01M4/5825H01M10/0525H01M2004/028Y02E60/10
Inventor 贾雪莹刘兴亮姚杰李鹏飞张路遥
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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