Preparation method of flexible anode of lithium-selenium battery

A battery and flexible technology, applied in the direction of battery electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems of reduced relative content of active materials, limited battery energy density, poor electrochemical performance of batteries, etc., to achieve volume expansion and good performance. Effect of ion transport ability and conductivity, high crystallinity

Active Publication Date: 2015-06-24
CENT SOUTH UNIV
View PDF3 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each process of the above method requires precise control, and the process is complicated
And the addition of inactive substances such as binders and conductive agents leads to a decrease in the relative content of active substances in the pole piece, which limits the energy density of the battery; the binder

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 flexible anode of lithium-selenium battery
  • Preparation method of flexible anode of lithium-selenium battery
  • Preparation method of flexible anode of lithium-selenium battery

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] Wash the bacterial cellulose membrane with deionized water (stored in the refrigerator), pre-freeze the sample with liquid nitrogen in a freeze dryer, freeze-dry it at -48°C and pressure 0.04 mbar for 24 hours to obtain bacteria Cellulose membrane, and then knock the bacterial cellulose membrane into discs. Put 0.89g Zn(NO 3 ) 2 ·6H 2 O, 0.49g bis-methylimidazole was dissolved in 100mL DMF to prepare ZIF-8 synthetic solution, the bacterial fiber membrane disc was immersed in the ZIF-8 synthetic solution with a concentration of 0.03mol / L, ultrasonicated for 30min, at 140℃ Under the hydrothermal reaction. After 24 hours of reaction, the product was washed, and then freeze-dried for 24 hours to obtain a ZIF-8 coated bacterial cellulose membrane material. Place the obtained product in a tube furnace, in an argon or nitrogen flow, carbonize at 800°C and keep it at a heating rate of 5°C / min for 4h to obtain a specific surface area of ​​1500m 2 / g, a self-sup...

Example Embodiment

[0041] Example 2

[0042] Wash the bacterial cellulose membrane with deionized water (stored in the refrigerator), pre-freeze the sample with liquid nitrogen in a freeze dryer, freeze-dry it at a temperature of -50°C and a pressure of 0.06 mbar for 20 hours to obtain bacteria Cellulose membrane, and then knock the bacterial cellulose membrane into discs. Put 0.89g Zn(NO 3 ) 2 ·6H 2 O, 0.74g of dimethylimidazole was dissolved in 100mL DMF to prepare ZIF-8 synthetic solution, the bacterial fiber membrane disc was immersed in the ZIF-8 synthetic solution with a concentration of 0.03mol / L, ultrasonicated for 30min, at 160℃ Under the hydrothermal reaction. After 18 hours of reaction, the product was washed, then freeze-dried for 20 hours to obtain ZIF-8 coated bacterial cellulose membrane material. Place the obtained product in a tube furnace, in an argon or nitrogen flow, at a heating rate of 5°C / min, carbonize at 900°C and hold for 3h, and obtain a specific surface area of ​​1400m...

Example Embodiment

[0043] Example 3

[0044] Bacterial cellulose membrane cleaned with deionized water (stored in the refrigerator), after pre-freezing the sample with liquid nitrogen in a freeze dryer, freeze-dried at a temperature of -30°C and a pressure of 0.01 mbar for 24 hours. Bacterial cellulose membrane, and then knock the bacterial cellulose membrane into discs. 1.48g Zn(NO 3 ) 2 ·6H 2 O, 0.82g of dimethylimidazole was dissolved in 100mL DMF to prepare ZIF-8 synthetic solution, the bacterial fiber membrane disc was immersed in the ZIF-8 synthetic solution with a concentration of 0.05mol / L, ultrasonicated for 30 minutes, at 200℃ Under the hydrothermal reaction. After 18 hours of reaction, the product was washed, and then freeze-dried for 24 hours to obtain ZIF-8 coated bacterial cellulose membrane material. Place the obtained product in a tube furnace, in an argon or nitrogen flow, carbonize at 800°C and keep it at a heating rate of 5°C / min for 4h to obtain a specific surface area of ​​15...

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
Specific surface areaaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of a flexible anode of a lithium-selenium battery. The flexible anode is compounded of a carbon fiber film and elemental selenium, wherein the carbon fiber film is self-supported and modified with nitrogen-containing porous carbon on the surface. The preparation method concretely comprises the steps of in situ forming a metal-organic framework ZIF-8 on a freeze-dried bacterial cellulose membrane, carrying out high temperature carbonization, and enabling the product to be compounded with a selenium-containing organic solvent. The flexible anode of the lithium-selenium battery, obtained by the method, has the advantages of good selenium fixing effect, high selenium content, high mechanical strength, etc. Furthermore, the preparation method is simple and does not need a complicated coating technology; the prepared flexible anode of the lithium-selenium battery is free of a bonding agent, a conductive agent and a current collector, is applied to the lithium-selenium battery and has excellent electrochemical performance.

Description

technical field [0001] The invention relates to a method for preparing a positive electrode of a lithium-selenium battery, belonging to the field of lithium-selenium batteries. Background technique [0002] The continuous growth of population, the gradual consumption of energy and the continuous deterioration of the environment make it extremely urgent to find efficient and clean energy storage devices. Among them, the high specific capacity and long service life of lithium batteries make them widely used in portable electronic devices and electric vehicle plug-in hybrid electric vehicles. However, at this stage, the improvement of the specific capacity of the positive electrode material of the lithium battery is limited, and the development of a battery system with high energy density has long been the general trend. The theoretical volumetric energy density of lithium-sulfur batteries is 3467mA h / cm 3 , It is expected to significantly improve the cruising range of electr...

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): H01M4/1397
CPCH01M4/139H01M4/362H01M10/052Y02E60/10
Inventor 张治安张娟赵星星李劼赖延清
Owner CENT SOUTH UNIV
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