Lithium ion battery electrode material preparation method

A technology for lithium ion batteries and electrode materials, which is applied in the field of preparation of lithium ion battery positive electrodes, can solve the problems of inability to increase specific capacity and reduce the energy density of electrode materials, and achieve good cycle and rate performance, good cycle stability, and energy density. high effect

Active Publication Date: 2017-07-25
NANJING UNIV OF TECH
View PDF6 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve this problem and make full use of active materials, it is often necessary to add a large amount of conductive carbon additives through physical mixing during the electrode preparat

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 electrode material preparation method
  • Lithium ion battery electrode material preparation method
  • Lithium ion battery electrode material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Take anhydrous aluminum chloride and sodium chloride and mix them evenly at a weight ratio of 4.6:1, and heat to 100~200℃ and stir for 10~50min to form a molten salt phase;

[0041] (2) Take 9,10-anthraquinone and pyromellitic anhydride and mix them evenly at a molar ratio of 1:1, then add them to the molten salt phase of step (1), mix well, and roast at 250°C for time. 20h.

[0042] (3) Add the calcined product in step (2) to 50 mL of 10 wt% hydrochloric acid solution, stir and acidify for 30 hours, and then filter with suction to obtain a crude product;

[0043] (4) The crude product obtained in step (3) is refluxed with deionized water, ethanol, and toluene one time in turn, each reflux time is 12-24h, and finally vacuum-dried at 60-100℃, the obtained black solid powder is For the product.

[0044] Use XRD to observe the product synthesized in Example 1, such as figure 1 Shown. From figure 1 It can be seen that there is a broad diffraction peak around 26.5°, which corr...

Embodiment 2

[0047] The difference from the above example 1 is that the raw materials in step (2) are 9,10-anthraquinone, phenazine and pyromellitic anhydride, and the molar ratio is 0.5:0.5:1 and mixed uniformly. The rest of the steps and the formula are uniform. Same as Example 1.

[0048] Use XRD to observe the product synthesized in Example 2, such as Image 6 As shown, a broad diffraction peak is observed at about 26.5° in 2θ, corresponding to the (002) crystal plane, which is a characteristic peak of carbon or graphite structure. From Figure 7 STEM image of the product and Figure 8 The nitrogen distribution map shows that the nitrogen atoms are successfully doped and the distribution is relatively uniform. Use SEM and TEM to observe the morphology of the product, such as Picture 9 with Picture 10 As shown, it can be seen from the figure that the synthesized product has a graphite-like sheet structure. Picture 11 It is the total spectrum of the X-ray photoelectron spectrum of the pr...

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 relates to a lithium ion battery electrode material preparation method. The method includes: well mixing anhydrous aluminum chloride and sodium chloride, heating and stirring to obtain a fused salt phase; well mixing a fused ring compound with anhydride according to a molar ratio of 1:1, adding into the fused salt phase, well mixing, and calcining; adding products obtained after calcination into hydrochloric acid solution, stirring for acidolysis for 12-48h, and leaching to obtain a crude product; sequentially subjecting the crude product to reflux with deionized water, ethyl alcohol and methyl benzene for one time, and performing vacuum drying to obtain a lithium ion battery electrode material. The method is simple, feasible, low in cost, green and environmental friendly, and completion in fused salt systems such as NaCl-AlCl3 can be realized; by binary or polybasic copolycondensation, flaws are introduced into the material to reduce intermolecular close packing and enhance electrochemical reaction activity of the electrode material; by doping of heteroatoms, electrical conductivity of the material is effectively improved; high energy density, high specific capacity and excellent rate and cycle performances are realized.

Description

Technical field [0001] The invention relates to a method for preparing a positive electrode of a lithium ion battery, in particular to the design and synthesis of a molecularly regulated conjugated polymer. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high energy density and power density, long cycle life, wide operating temperature range, no memory effect and good safety performance. They have been widely used in portable electronic products. After recent years of research technology and the expansion of application fields, lithium-ion batteries have begun to advance in a diversified direction, and there is also a huge demand in electric vehicles and energy storage power stations. Traditional inorganic cathode materials, including lithium-containing metal oxides or phosphates, have limited capacity enhancement, poor safety and stability, unfriendly environment, and high cost, which limit their application in large power batteri...

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): H01M4/60H01M4/36H01M10/0525
CPCH01M4/362H01M4/602H01M10/0525Y02E60/10
Inventor 黄程王小丽叶飞刘俊凯黄维
Owner NANJING UNIV OF TECH
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