Supercharge Your Innovation With Domain-Expert AI Agents!

Three-dimensional nano molybdenum-based lithium ion battery negative electrode material and preparation method thereof

A lithium-ion battery, three-dimensional nanotechnology, applied in battery electrodes, nanotechnology, nanotechnology and other directions, can solve the problems of low specific energy storage capacity, poor charge-discharge cycle stability, etc., and achieve small energy storage capacity attenuation, The effect of stable structure and good energy storage capacity performance

Pending Publication Date: 2022-05-31
NARI TECH CO LTD +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the above-mentioned problems of low energy storage specific capacity and poor charge-discharge cycle stability, and provides a method for preparing a three-dimensional nano-molybdenum-based lithium-ion battery negative electrode material

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
  • Three-dimensional nano molybdenum-based lithium ion battery negative electrode material and preparation method thereof
  • Three-dimensional nano molybdenum-based lithium ion battery negative electrode material and preparation method thereof
  • Three-dimensional nano molybdenum-based lithium ion battery negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Place the molybdenum trioxide nanobelt sample in the middle of the quartz tube, and place a sufficient amount of sublimed sulfur sample near the inlet of the quartz tube, and discharge the internal air through the quartz tube with a flow rate of 500 sccm for 15 minutes, and then pass Inject hydrogen at a flow rate of 200 sccm, and heat to 300°C at a heating rate of 20°C / min. Then, the sublimated sulfur was slowly moved to the heating zone in the furnace at a temperature of 300°C and kept for 45 minutes. The sublimated sulfur reacts with hydrogen at 300°C to generate hydrogen sulfide gas, which realizes the surface sulfidation of the molybdenum trioxide nanobelt, so that the molybdenum disulfide nanomask grows in situ on the surface of the molybdenum trioxide nanobelt. Afterwards, the introduction of hydrogen gas was stopped, and the flow rate of 200 sccm was used to feed argon gas into the quartz tube, and the sample was cooled to room temperature to obtain a molybdenum...

Embodiment 2

[0042] The molybdenum trioxide nanoribbon sample is placed in the middle of the quartz tube, and the argon gas with a flow rate of 600 sccm is passed into the quartz tube for 15 minutes to exhaust the internal air, and then the hydrogen sulfide gas with a flow rate of 200 sccm is introduced, and the temperature is increased at 10 ° C / Heat up to 300°C at a heating rate of min and hold for 45 minutes. Afterwards, the introduction of hydrogen sulfide gas was stopped, and argon gas was introduced into the quartz tube at a flow rate of 300 sccm, and the sample was cooled to room temperature to obtain molybdenum disulfide nanomask nanobelts with molybdenum oxide inside.

[0043] Add 100 mg molybdenum disulfide nanomask nanobelts into 200 ml hydrochloric acid and stir magnetically for 24 hours. Then pour the solution into a centrifuge tube and centrifuge at a speed of 12000r / min for 10 minutes. After centrifugation, pour out the supernatant, add hydrochloric acid again to 200 ml, ...

Embodiment 3

[0046] Carry out the making of lithium ion battery to the lithium ion battery material prepared by the present invention, the method is as follows:

[0047] The lithium-ion battery shell is a CR2025 button battery shell, the metal lithium sheet is used as the counter electrode, the metal copper foil is used as the collector electrode, and the microporous membrane of polypropylene material is used as the diaphragm (the model is Cellgard 2400), and the concentration is 1.0 mol / L LiPF 6 A solution of ethylene carbonate and dimethyl carbonate (volume ratio 1:1) was used as the electrolyte. Ultra-pure conductive carbon black powder is used as the conductive agent of the active material, and polyacrylic acid is used as the binder. The lithium ion battery material prepared in the present invention, the mass ratio of the conductive agent and the binder is 7:2:1, add an appropriate amount of ionic water to disperse, grind for about 20 minutes to make it fully and evenly mixed, and 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

No PUM Login to View More

Abstract

The invention discloses a three-dimensional nano molybdenum-based lithium ion battery negative electrode material and a preparation method thereof, a three-dimensional molybdenum disulfide nano mask is synthesized on the surface of a molybdenum trioxide nanobelt in situ by an in-situ synthesis method, and a molybdenum oxide structure in the nano mask is etched by hydrochloric acid to obtain a hollow structure of molybdenum disulfide nanotubes and molybdenum oxide. Due to relatively high specific surface area and good structural stability, a lithium ion battery performance test shows that the specific capacity of the finally obtained material is kept at about 1150 mAh / g after 250 cycles under the charge-discharge current density of 100 mAh / g. Compared with similar materials, the material not only shows higher energy storage capacity performance, but also has smaller attenuation degree of energy storage capacity.

Description

technical field [0001] The invention relates to a three-dimensional nanomolybdenum-based lithium-ion battery negative electrode material and a preparation method thereof, belonging to the technical field of lithium-ion battery energy storage. Background technique [0002] Lithium-ion batteries are widely used in energy storage systems due to their high energy density, long life and high efficiency. At present, the most common negative electrode material is graphite, but due to its unstable structure, lithium ions will damage the graphite structure during charging and discharging, resulting in capacity loss, and graphite has only a theoretical specific capacity of 372 mAh / g. Due to the above problems, it is difficult to further improve the energy storage capacity of the current lithium-ion battery. Molybdenum disulfide is a very promising material in energy storage applications. It has good energy storage properties due to its unique layered structure, and it has a wide inte...

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): C01G39/02C01G39/06H01M4/58H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCC01G39/02C01G39/06H01M4/5815H01M4/62H01M10/0525B82Y30/00B82Y40/00C01P2004/80C01P2004/04C01P2002/72C01P2006/40C01P2004/17Y02E60/10
Inventor 刘泽晨刁东宇李照国张婷张丛丛琚璐
Owner NARI TECH CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com