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

Lithium ion battery positive electrode material uniformly coated with MOF (Metal Organic Framework) and preparation method of lithium ion battery positive electrode material

A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of complex preparation process, high cost, and difficulty in forming a uniform coating layer, and achieve high specific capacity, good Rate performance, the effect of improving electrochemical performance

Active Publication Date: 2022-03-15
HUAZHONG UNIV OF SCI & TECH
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxide, fluoride, phosphate and other types of materials are used as cladding materials (Adv.Energy Mater.2019, 9, 1901597; Adv.Energy Mater. ; Energy Storage Materials 38(2021) 309–328), but its preparation process is complicated, the cost is high, and it is difficult to form a uniform coating layer

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 ion battery positive electrode material uniformly coated with MOF (Metal Organic Framework) and preparation method of lithium ion battery positive electrode material
  • Lithium ion battery positive electrode material uniformly coated with MOF (Metal Organic Framework) and preparation method of lithium ion battery positive electrode material
  • Lithium ion battery positive electrode material uniformly coated with MOF (Metal Organic Framework) and preparation method of lithium ion battery positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] A method for preparing a positive electrode material of a lithium-ion battery coated with MOF uniformly provided by an embodiment of the present invention, such as figure 1 shown, including the following steps:

[0030] (1) Add 2,5-dihydroxyterephthalic acid or its derivatives into an organic solvent and stir for 10-20 minutes to obtain a solution of 2,5-dihydroxyterephthalic acid, namely solution A;

[0031] (2) Add the lithium-ion battery positive electrode particles into the solution A under stirring, and stir at room temperature for 4h to 8h to obtain the mixed solution B; wherein the hydroxyl group in 2,5-dihydroxyterephthalic acid and the lithium-ion battery positive electrode The residual alkali on the particle is combined, and the 2,5-dihydroxyterephthalic acid is coated on the surface of the positive electrode particle of the lithium-ion battery through hydrogen bonding;

[0032] (3) Add the metal salt to the mixed solution B under stirring, stir at room tempe...

Embodiment 1

[0042] A method for preparing a positive electrode material for a lithium-ion battery with uniformly coated MOF, comprising the following steps:

[0043] (1) Add 25mL of N,N-dimethylformamide into a 50mL beaker, add 10.4mg of 2,5-dihydroxyterephthalic acid under the condition of stirring speed of 500r / min, and make it fully Dissolving to obtain solution A of 2,5-dihydroxyterephthalic acid;

[0044] (2) Under mechanical stirring at 500r / min, slowly add 0.6g of lithium-rich manganese-based cathode material (Li 1.2 mn 0.54 co 0.13 Ni 0.13 o 2 ) to obtain a mixed solution B of 2,5-dihydroxyterephthalic acid coated lithium-rich manganese-based positive electrode material;

[0045] (3) Slowly add 10.6 mg of magnesium acetate tetrahydrate to the mixed solution B obtained in step (2) under mechanical stirring at 500 r / min to obtain a mixed solution C of Mg-MOF coated lithium-rich manganese-based positive electrode material;

[0046] (4) Stir the mixed solution C at 25°C for 15h;...

Embodiment 2

[0050] A method for preparing a positive electrode material for a lithium-ion battery with uniformly coated MOF, comprising the following steps:

[0051] (1) Add 25mL of N,N-dimethylformamide into a 50mL beaker, add 6.3mg of 2,5-dihydroxyterephthalic acid at a stirring speed of 500r / min, and dissolve it fully , to obtain 2,5-dihydroxyterephthalic acid solution A;

[0052] (2) Under the mechanical stirring of 500r / min, slowly add 1.2g lithium-rich manganese-based cathode material (Li 1.2 mn 0.54 co 0.13 Ni 0.13 o 2 ) to obtain a mixed solution B of 2,5-dihydroxyterephthalic acid coated lithium-rich manganese-based positive electrode material;

[0053] (3) Under mechanical stirring at 500r / min, slowly add 6.7mg of zirconium chloride to the mixed solution B obtained in step (2), to obtain a mixed solution C of Zr-MOF coated lithium-rich manganese-based positive electrode material;

[0054] (4) Stir the mixed solution C at 40°C for 8h;

[0055] (5) Suction filtration of 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
Login to View More

Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly discloses an MOF uniformly coated lithium ion battery positive electrode material and a preparation method thereof, the preparation method comprises the following steps: S1, at room temperature, adding lithium ion battery positive electrode particles into a 2, 5-dihydroxy terephthalic acid solution to obtain a mixed solution, hydroxyl in the 2, 5-dihydroxy terephthalic acid is combined with residual alkali on the lithium ion battery positive electrode particles to form the lithium ion battery positive electrode particles coated with the 2, 5-dihydroxy terephthalic acid; and S2, adding a metal salt into the mixed solution, and reacting the 2, 5-dihydroxy terephthalic acid coated on the lithium ion battery positive electrode particles with metal ions to generate MOF, thereby obtaining the MOF uniformly coated lithium ion battery positive electrode material. The lithium ion battery positive electrode material uniformly coated with the MOF can be obtained through the preparation method, and the lithium ion battery positive electrode material has high specific capacity, good rate capability and stable cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and more specifically relates to a lithium ion battery positive electrode material uniformly coated with MOF and a preparation method thereof. Background technique [0002] As a material for providing lithium ions in lithium-ion batteries, the performance of positive electrode materials directly affects the performance and application of lithium-ion batteries. In recent years, lithium-rich manganese-based, ternary, and lithium cobalt oxide cathode materials with high energy density have attracted much attention, and they are favorable competitors for the next generation of commercial lithium-ion battery cathode materials. However, due to its high operating voltage and poor cycle stability, its further application is limited. [0003] So far, different methods have been used to improve the performance of lithium-rich manganese-based, ternary, and lithium cobalt oxide cathode 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): H01M4/62H01M10/0525C08G83/00
CPCH01M4/62H01M4/628H01M10/0525C08G83/008Y02E60/10
Inventor 方淳王志昊韩建涛徐佳王鑫李琪
Owner HUAZHONG UNIV OF SCI & TECH
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