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

Preparation method of lithium manganese phosphate-graphene composite material, lithium manganese phosphate-graphene composite material and application of composite material

A technology of lithium manganese phosphate and composite materials, applied in nanotechnology, active material electrodes, electrical components, etc. for materials and surface science, can solve the problems of low electronic conductivity, ion mobility limitation, etc., to improve the conductivity , The effect of improving the mobility of Li+ ions

Active Publication Date: 2021-04-13
GRIMAT ENG INST CO LTD +2
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extremely low electronic conductivity of lithium manganese phosphate and Li + Ion mobility also largely limits practical applications

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
  • Preparation method of lithium manganese phosphate-graphene composite material, lithium manganese phosphate-graphene composite material and application of composite material
  • Preparation method of lithium manganese phosphate-graphene composite material, lithium manganese phosphate-graphene composite material and application of composite material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] According to the first aspect of the present invention, the present invention provides a kind of preparation method of lithium manganese phosphate-graphene composite material, comprises the steps:

[0032] First, graphene oxide is used as a growth template, and nano-lithium manganese phosphate crystals are grown in situ on graphene oxide; then, graphene oxide is reduced to graphene, and graphene is coated on the surface of nano-lithium manganese phosphate crystals in situ, to obtain Lithium manganese phosphate-graphene composites.

[0033] In the present invention, the lithium manganese phosphate-graphene composite material is obtained by in-situ growth and in-situ coating. Compared with the synthesis of lithium manganese phosphate by the solid-state method, crystals are obtained from the bottom-up reaction of the ion size, and nano-sized manganese phosphate can be obtained. lithium. Compared with the conventional solvothermal synthesis of lithium manganese phosphate, ...

Embodiment 1

[0067] The present embodiment provides a kind of lithium manganese phosphate-graphene composite material, and its preparation method comprises the steps:

[0068] (1) Lithium source, manganese source, phosphate source are weighed according to the ratio of 3:1:1 according to the mol ratio of lithium ion, manganese ion and phosphate ion;

[0069] (2) Lithium source and phosphate source are dissolved in glycerol respectively to obtain lithium solution I and phosphate solution II;

[0070] (3) graphene oxide is dispersed in water, after ultrasonic treatment, obtain graphene oxide solution;

[0071] (4) dissolving the manganese source and an appropriate amount of ascorbic acid in the graphene oxide solution in step (3), stirring for 4-12h to obtain a mixed solution III of the manganese source and graphene oxide;

[0072] (5) Add the solution III obtained in step (4) into the reaction kettle, and add the phosphate solution II dropwise at a rate of 100-200mL / min. After the dropwise ...

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 provides a preparation method of a lithium manganese phosphate graphene composite material, the lithium manganese phosphate graphene composite material and application of the composite material, and relates to the technical field of battery materials. The preparation method comprises the following steps: taking graphene oxide as a growth template, and growing nano lithium manganese phosphate crystals on the graphene oxide in situ; and then reducing the graphene oxide into graphene, and coating the surface of the nano lithium manganese phosphate crystal with the graphene in situ to obtain the lithium manganese phosphate graphene composite material. According to the preparation method of the lithium manganese phosphate graphene composite material provided by the invention, on one hand, in-situ growth is realized by utilizing the coordination effect of a negatively charged functional group on graphene oxide and the steric hindrance effect of the large surface of the graphene oxide, and the Li<+> ion mobility of lithium manganese phosphate is improved; and on the other hand, through in-situ coating of graphene, the graphene layer and the lithium manganese phosphate crystal are tightly combined and uniformly and completely coated, so that the conductivity of the nano lithium manganese phosphate graphene composite material is effectively improved.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a preparation method of a lithium manganese phosphate-graphene composite material, a lithium manganese phosphate-graphene composite material and applications thereof. Background technique [0002] Cathode materials are still the main technical bottleneck that determines the energy density of power lithium-ion batteries. In the positive electrode materials used in lithium-ion batteries, in the olivine structure phosphate source material system, all oxygen ions are bonded to P through strong covalent bonds. 5+ constitute a stable (PO 4 ) 3- Polyanionic groups, so the oxygen in the lattice is not easy to lose, which makes the material very safe and suitable for use as power batteries in the field of new energy vehicles and energy storage, but LiFePO 4 The voltage platform of the material is low (3.4V), and its energy density is limited. [0003] Lithium manganese phosp...

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 Applications(China)
IPC IPC(8): H01M4/62H01M4/58H01M10/0525B82Y30/00B82Y40/00
CPCH01M4/5825H01M4/625H01M10/0525B82Y30/00B82Y40/00H01M2004/028H01M2004/021Y02E60/10
Inventor 罗熳蒋文全夏信德薛建军尹鸿章郭亚茹
Owner GRIMAT ENG INST CO LTD
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