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

Preparation method of molybdenum sulfide/three-dimensional macroporous graphene and lithium ion battery negative electrode material

A three-dimensional macropore and graphene technology, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of poor rate performance of lithium-ion batteries, easy stacking of sheet structures, and attenuation of discharge capacity to achieve enhanced battery rates Performance, low cost, and the effect of improving poor conductivity

Active Publication Date: 2019-12-10
YANGZHOU UNIV
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its poor conductivity, the sheet-like structure is easy to stack, resulting in poor rate performance, short cycle life, and attenuation of discharge capacity of lithium-ion batteries.

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 molybdenum sulfide/three-dimensional macroporous graphene and lithium ion battery negative electrode material
  • Preparation method of molybdenum sulfide/three-dimensional macroporous graphene and lithium ion battery negative electrode material
  • Preparation method of molybdenum sulfide/three-dimensional macroporous graphene and lithium ion battery negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of molybdenum glycerate spheres: Weigh 120 mg of molybdenum acetylacetonate into a 100 mL beaker, add 30 mL of isopropanol, 10 mL of water and 8 mL of glycerin, and then place the mixture under the condition of 55 kHz to make it Dissolved into a colorless and transparent solution, then transferred to a stainless steel autoclave lined with polytetrafluoroethylene with a capacity of 100 mL, set the temperature of the blast drying oven at 190 °C, and reacted for 3 h. After the reaction, it was naturally cooled to At room temperature, wash several times with ethanol centrifugation at 6000 rpm. Transfer to a blast drying oven, set the temperature at 60 °C, and dry for 12 h;

[0034] (2) Preparation of molybdenum glycerate spheres / three-dimensional macroporous graphene: Weigh 50 mg molybdenum glycerate spheres and 40 mg graphene oxide and disperse them in a beaker containing 40 mL deionized water, ultrasonically disperse for 1 h, then transfer to a 100 In a s...

Embodiment 2

[0044] In this example, the MoS prepared in Example 1 is used respectively 2 / 3D-rGO composites and MoS prepared by comparative examples 2 The electrode active material will be used to manufacture and assemble lithium-ion batteries and perform performance tests.

[0045] Use NMP as solvent to prepare MoS with prepared examples 2 / 3D-rGO composite material is used as the active material, acetylene black is used as the conductive agent, PVDF is used as the binder, the mass ratio of the three components is 8:1:1, the slurry is prepared by magnetic stirring for 8 hours, and the prepared slurry is prepared by a coating machine The good slurry is evenly coated on the copper foil and kept at 80°C for 10h. After drying, cut it into MoS with a microtome 2 / 3D-rGO electrode sheet, and then vacuum-dried at 120 °C for 12 h to remove a small amount of moisture. After the electrode piece is weighed, it is directly used as the negative electrode of the lithium-ion battery to assemble 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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of molybdenum sulfide / three-dimensional macroporous graphene for a lithium ion battery negative electrode material in the field of battery materials. According to the invention, molybdenum acetylacetonate powder is used as a molybdenum source, and the preparation method comprises the steps of adding the molybdenum acetylacetonate powder into a mixed solution composed of isopropanol, water and glycerol, preparing molybdenum glycerate spheres through solvothermal reaction, carrying out hydrothermal reaction on the molybdenum glycerate spheres and graphene oxide to obtain molybdenum glycerate sphere / three-dimensional macroporous graphene, taking thiourea as a sulfur source, taking ethanol and water as solvents, vulcanizing the molybdenum glyceratespheres by a solvothermal reaction to obtain molybdenum sulfide / three-dimensional macroporous graphene which is used for the lithium ion battery negative electrode material. The MoS2 / 3D-rGO compositematerial prepared by the method disclosed by the invention has the advantages that MoS2 is uniformly loaded on macroporous graphene, the specific surface area of graphene is increased, the infiltration of an electrolyte is facilitated, the migration rate of lithium ions is increased, structural collapse caused by volume expansion between molybdenum sulfide sheet layers can be effectively relievedby virtue of the porous structure of three-dimensional graphene, and the cycling stability of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a method for preparing molybdenum sulfide / three-dimensional macroporous graphene used as negative electrode active materials for lithium ion batteries. Background technique [0002] Lithium-ion batteries are widely used in mobile phones, portable computers, photographic / camera equipment, robots and electric vehicles due to their high specific power, long cycle life and good discharge performance, and in the fields of aerospace, artificial satellites and military communication equipment played a role. At present, for lithium-ion batteries, there are more and more types of positive and negative electrode materials, and their applications are becoming more and more extensive. As the mainstream battery for energy storage devices, the energy density of lithium-ion batteries needs to be improved. [0003] Molybdenum disulfide is a black solid material with a metallic luster...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/5815H01M4/625H01M4/628H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 李娟胡民远许丽佳刘祎婷胡钟方饶燕
Owner YANGZHOU UNIV
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