Preparing method of nanometer nickel-cobalt-sulphur particles serving as positive electrode of lithium sulphur battery

A lithium-sulfur battery and nano-nickel technology, which is applied in the field of preparation of nano-nickel-cobalt-sulfur particles, can solve the problems of high battery sealing performance, damage to the battery structure, positive electrode volume expansion, etc., to reduce the shuttle effect, increase the specific surface area, small size effect

Active Publication Date: 2018-05-29
DONGHUA UNIV
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in addition to the disadvantages of traditional lithium-ion batteries, lithium-sulfur batteries have more serious problems: metal lithium will gradually generate lithium dendrites during charging and discharging, which will eventually pierce the separator and cause a short circuit of the battery; Lithium, so the sealing performance of the battery is very high; the discharge intermediate product lithium polysulfide can be dissolved in the electrolyte,

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
  • Preparing method of nanometer nickel-cobalt-sulphur particles serving as positive electrode of lithium sulphur battery
  • Preparing method of nanometer nickel-cobalt-sulphur particles serving as positive electrode of lithium sulphur battery
  • Preparing method of nanometer nickel-cobalt-sulphur particles serving as positive electrode of lithium sulphur battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 75 mg of cobalt nitrate hexahydrate, 75 mg of nickel nitrate hexahydrate and 3 g of sodium acetate and dissolve in 40 mL of deionized water, then add 0.2 g of potassium persulfate or ammonium persulfate and stir for 30 min to obtain a pink solution.

[0031] (2) Pour the pink solution obtained in step (1) into the lining of a 50mL polytetrafluoroethylene autoclave, seal it, place it in a constant temperature oven, and raise the temperature to 180°C at a rate of 10°C / min for 6 hours. , after being naturally cooled, washed with deionized water and ethanol respectively, centrifuged several times until there were no foreign ions, and placed in a constant temperature vacuum oven at 60°C for 12 hours to obtain a fluffy and dry black nickel cobaltate nanopowder.

[0032] (3) Take 30 mg of black nickel cobaltate nanopowder in step (2), add 40 mL of deionized water and ultrasonically disperse for 30 minutes, add 0.96 g of sodium sulfide nonahydrate, and pour the mixture...

Embodiment 2

[0035] (1) Weigh 100 mg of cobalt nitrate hexahydrate, 50 mg of nickel nitrate hexahydrate and 3 g of sodium acetate and dissolve in 40 mL of deionized water, then add 0.2 g of potassium persulfate or ammonium persulfate and stir for 60 min to obtain a pink solution.

[0036] (2) Pour the pink solution obtained in step (1) into the lining of a 50mL polytetrafluoroethylene autoclave, seal it, place it in a constant temperature oven, and raise the temperature to 180°C at a rate of 10°C / min for 6 hours. , after natural cooling, wash with deionized water and ethanol respectively, centrifuge several times until there are no foreign ions, and place in a constant temperature vacuum oven at 60°C for 12 hours to obtain fluffy and dry black nickel cobaltate nanopowder.

[0037] (3) Take 30 mg of black nickel cobaltate nanopowder in step (2), add 40 mL of deionized water and ultrasonically disperse for 30 minutes, add 0.96 g of sodium sulfide nonahydrate, and pour the mixture into the lin...

Embodiment 3

[0039] (1) Weigh 50 mg of cobalt nitrate hexahydrate, 100 mg of nickel nitrate hexahydrate and 3 g of sodium acetate and dissolve in 40 mL of deionized water, then add 0.2 g of potassium persulfate or ammonium persulfate and stir for 60 min to obtain a pink solution.

[0040] (2) Pour the pink solution obtained in step (1) into the lining of a 50mL polytetrafluoroethylene autoclave, seal it, place it in a constant temperature oven, and raise the temperature to 180°C at a rate of 10°C / min for 6 hours. , after natural cooling, wash with deionized water and ethanol respectively, centrifuge several times until there are no foreign ions, and place in a constant temperature vacuum oven at 60°C for 12 hours to obtain fluffy and dry black nickel cobaltate nanopowder.

[0041](3) Take 30 mg of black nickel cobaltate nanopowder in step (2), add 40 mL of deionized water and ultrasonically disperse for 30 minutes, add 0.96 g of sodium sulfide nonahydrate, and pour the mixture into the lini...

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
Sizeaaaaaaaaaa
Coulombic efficiencyaaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparing method of nanometer nickel-cobalt-sulphur particles serving as a positive electrode of a lithium sulphur battery. The preparing method comprises the steps of dissolving cobalt nitrate hexahydrate, nickel nitrate hexahydrate and sodium acetate into a solvent, adding potassium peroxodisulfate or ammonium persulfate, stirring, pouring the mixture into a reaction kettle to be reacted, cooling, washing, centrifuging, drying, dissolving the mixture into a solvent, conducting ultrasonic treatment, adding sodium sulfide nonahydrate, putting the mixture into the reaction kettle to be reacted, cooling, washing, centrifuging and drying to obtain the nanometer nickel-cobalt-sulphur particles. The preparing method is simple, feasible, safe, and environmentally friendly, raw materials are easy to obtain, the cost is low, and the preparing method is suitable for large-scale production; the prepared nanometer nickel-cobalt-sulphur particles have small size, the specific area is increased, the nickel-cobalt-sulphur particles have a good effect of fixing polysulfide, and the shuttling effect of the battery is obviously weakened. Besides, compared with oxides andbinary sulfides which are used for sulfur fixation generally, nickel-cobalt-sulphur has good electrical conductivity. On the condition that a certain specific capacity is guaranteed, the circulating stability of the battery is improved, and the preparing method has a huge potential in solving the current problem existing in lithium sulphur batteries.

Description

technical field [0001] The invention belongs to the field of preparation of ion battery electrode materials, in particular to a preparation method of nano-nickel-cobalt-sulfur particles used as positive poles of lithium-sulfur batteries. Background technique [0002] The efficient utilization and storage of energy has always been a major scientific and technological problem in the development of energy. During this period, lithium-ion batteries have entered people's lives as a high-load, portable device. Lithium-sulfur batteries have a high theoretical specific capacity (1675mAh / g), which is far higher than the current graphite-based lithium battery. ion battery (372mAh / g), thus becoming a promising next-generation energy storage device. However, in addition to the disadvantages of traditional lithium-ion batteries, lithium-sulfur batteries have more serious problems: metal lithium will gradually generate lithium dendrites during charging and discharging, which will eventua...

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): H01M4/58H01M10/052C01G53/00B82Y30/00
CPCB82Y30/00C01G53/006C01P2004/64H01M4/5815H01M10/052H01M2004/021H01M2004/028Y02E60/10
Inventor 邹儒佳何书昂胡俊青张剑华唐蓉师雨婷徐超霆崔哲许鸣东张文龙关国强黄小娟
Owner DONGHUA 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