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

Preparation method capable of increasing electrochemical performance of magnesium-sodium-doped lithium permanganate anode material

A positive electrode material, lithium manganate technology, which is applied in the field of preparation of magnesium and sodium double doping to improve the electrochemical performance of lithium manganate positive electrode material, can solve the problem of three-dimensional diffusion channel blockage of lithium ions, and achieve excellent cycle stability, Broad application prospects and the effect of improving electrochemical performance

Inactive Publication Date: 2017-02-22
GUILIN UNIVERSITY OF TECHNOLOGY
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Jahn-Teller effect still exists, and the three-dimensional diffusion channels of lithium ions may still be blocked

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 capable of increasing electrochemical performance of magnesium-sodium-doped lithium permanganate anode material
  • Preparation method capable of increasing electrochemical performance of magnesium-sodium-doped lithium permanganate anode material
  • Preparation method capable of increasing electrochemical performance of magnesium-sodium-doped lithium permanganate anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Dissolve 0.0357mol of manganese sulfate monohydrate in 250mL of deionized water, and then add 25mL of absolute ethanol dropwise.

[0026] (2) Dissolve 0.357mol ammonium bicarbonate in 250mL deionized water.

[0027] (3) Slowly add the solution obtained in step (2) dropwise into the solution obtained in step (1) for 3 times to obtain a milky white suspension, stir it with a DF-101S heat-collecting magnetic stirrer at 35°C for 1 hour, and age After 3 hours, a pale pink precipitate was obtained; the pale pink precipitate was suction-filtered, washed, and dried in a vacuum oven at 40°C for 8 hours to obtain a pale pink manganese carbonate powder.

[0028] (4) Place the light pink manganese carbonate powder obtained in step (3) in a muffle furnace for pre-sintering at 300°C for 2 hours. After pre-sintering, wash it with hydrochloric acid with a concentration of 0.1 mol / L for 2 days, filter it with suction, and wash it. Send it to 100°C for vacuum drying for 12 hours to ...

Embodiment 2

[0033] (1) Dissolve 0.0357mol of manganese sulfate monohydrate in 250mL of deionized water, and then add 25mL of absolute ethanol dropwise.

[0034] (2) Dissolve 0.357mol ammonium bicarbonate in 250mL deionized water.

[0035] (3) Slowly add the solution obtained in step (2) dropwise into the solution obtained in step (1) for 3 times to obtain a milky white suspension, stir it with a DF-101S heat-collecting magnetic stirrer at 35°C for 1 hour, and age After 3 hours, a pale pink precipitate was obtained; the pale pink precipitate was suction-filtered, washed, and dried in a vacuum oven at 40°C for 8 hours to obtain a pale pink manganese carbonate powder.

[0036] (4) Place the light pink manganese carbonate powder obtained in step (3) in a muffle furnace for pre-sintering at 300°C for 2 hours. After pre-sintering, wash it with hydrochloric acid with a concentration of 0.1 mol / L for 2 days, filter it with suction, and wash it. Send it to 100°C for vacuum drying for 12 hours to ...

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 preparation method capable of increasing the electrochemical performance of a magnesium-sodium-doped lithium permanganate anode material. The preparation method includes the steps of firstly, dissolving manganese sulfate monohydrate into deionized water, and dropwise adding anhydrous ethanol; secondly, dissolving ammonium bicarbonate into deionized water; thirdly, mixing the obtained solutions, stirring, aging, performing precipitation and suction filtration, washing, and drying to obtain manganese carbonate; fourthly, pre-sintering the manganese carbonate, washing with hydrochloric acid, performing suction filtration, washing, and drying to obtain manganese dioxide; fifthly, grinding a lithium source, the manganese dioxide, a magnesium ion doping source and a sodium ion doping source, sintering, and cooling to obtain the magnesium-sodium-doped lithium permanganate anode material Li1-xNaxMgyMn2-yO4, wherein x=0.01-0.2, and y=0.01-0.2. The preparation method has the advantages that the method is simple in process, environmentally friendly, low in cost and capable of preparing the well-crystallized magnesium-sodium-doped lithium permanganate anode material even in distribution, and the electrochemical performance of the material is increased evidently.

Description

technical field [0001] The invention relates to a preparation method for improving the electrochemical performance of a lithium manganate cathode material by doping magnesium and sodium. Background technique [0002] In recent years, people have paid more and more attention to the development and application of new energy and new materials, so as to drive the development of various portable electronic product industries and electric vehicle industries. Due to the advantages of high specific energy, good safety, long cycle life, green and pollution-free, lithium-ion secondary batteries have attracted attention from all over the world. Today, the research and development of cathode materials for lithium-ion batteries is one of the key factors restricting the development of lithium-ion power batteries. Due to the lithium manganese oxide cathode material battery has outstanding advantages such as high working voltage, good cycle performance, long service life, low cost, environ...

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): H01M4/505H01M10/0525
CPCH01M4/505H01M10/0525Y02E60/10
Inventor 肖顺华毛雁芳
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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