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

Molybdenum disulfide-coated carbon nanofiber used as negative electrode material for lithium-ion battery and preparation method of molybdenum disulfide-coated carbon nanofiber

A lithium-ion battery and carbon nanofiber technology, applied in the field of electrochemical power supply, can solve the problems of poor conductivity of molybdenum disulfide, etc., achieve stable cycle performance, good application prospects, and achieve the effect of large-scale production

Active Publication Date: 2018-02-09
HEFEI UNIV OF TECH
View PDF10 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the shortcomings of the above-mentioned prior art, the present invention provides a molybdenum disulfide-coated carbon nanofiber used as a negative electrode material for a lithium-ion battery and a preparation method thereof, aiming at solving the problems of the existing molybdenum disulfide Poor conductivity and volume expansion during battery charging and discharging to improve the cycle performance and rate performance of the battery and improve stability

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
  • Molybdenum disulfide-coated carbon nanofiber used as negative electrode material for lithium-ion battery and preparation method of molybdenum disulfide-coated carbon nanofiber
  • Molybdenum disulfide-coated carbon nanofiber used as negative electrode material for lithium-ion battery and preparation method of molybdenum disulfide-coated carbon nanofiber
  • Molybdenum disulfide-coated carbon nanofiber used as negative electrode material for lithium-ion battery and preparation method of molybdenum disulfide-coated carbon nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The present embodiment prepares lithium-ion battery negative electrode material according to the following steps:

[0036] a. Weigh 1.488g Zn(NO 3 ) 2 ·6H 2O was fully dissolved in 100mL of methanol, and another 3.28g of 2-methylimidazole was weighed and fully dissolved in 100mL of methanol; the 2-methylimidazole solution was quickly poured into Zn(NO 3 ) 2 ·6H 2 O solution, stirred vigorously at room temperature for 6h, and then centrifuged to separate the ZIF-8 nanoparticles; disperse the ZIF-8 nanoparticles with 5mL N,N-dimethylformamide, then add 0.35g PAN, stir for 8h, and prepare spinning precursors.

[0037] b. Pour the spinning precursor obtained in the above steps into a 10mL syringe, and load it on an electrospinning instrument for spinning to obtain composite nanofibers of ZIF-8 and PAN; the loaded voltage is 8.5kv, and the injection speed is 0.3 ml / h, the distance between the needle and the receiving screen is 20cm; the receiving screen is made of copp...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a molybdenum disulfide-coated carbon nanofiber used as a negative electrode material for a lithium-ion battery and a preparation method of the molybdenum disulfide-coated carbon nanofiber. The molybdenum disulfide-coated carbon nanofiber is characterized in that the outer surface of a mesoporous carbon nanofiber is coated with a layer of molybdenum disulfide nanosheet; andduring preparation, a nanofiber containing ZIF-8 is firstly prepared by using an electrostatic spinning assembly method, a porous carbon nanofiber is formed after high-temperature carbonization of thefiber, and the surface of the carbon nanofiber is coated with a layer of flaky molybdenum disulfide through a hydrothermal method, thereby obtaining a target product used as a negative electrode material for a lithium-ion battery. The molybdenum disulfide-coated carbon nanofiber is the negative electrode material for the lithium-ion battery capable of being charged and discharged, the problems ofpoor stability and poor conductivity of the flaky molybdenum disulfide material in charging and discharging processes of the battery are effectively solved, the cycle performance and the rate capability of the battery are improved and the electron transport rate in the cycle process of the battery is improved; and the preparation method is simple, massive production can be achieved and the preparation method has a good application prospect.

Description

technical field [0001] The invention relates to a rechargeable and dischargeable lithium ion battery negative electrode material and a preparation method thereof, belonging to the field of electrochemical power sources. Background technique [0002] Facing the current increasingly pressing energy and environmental issues, the development of efficient and stable lithium secondary batteries has become a top priority. Lithium-ion batteries have the characteristics of high energy density, long cycle life, and environmental friendliness (Energy Environ. Sci., 2014, 7, 3320–3325), and are widely used in portable electronic products and power or energy storage batteries and other fields. At present, graphite anode materials for commercial lithium-ion batteries have low specific capacity and poor rate performance, and the theoretical specific capacity of commercial carbon is 372 mAh g -1 (Journal of Alloys and Compounds 673 (2016) 215-219), and there is a large safety hazard, so th...

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): H01M4/36H01M4/58H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/5815H01M4/62H01M4/625H01M10/0525Y02E60/10
Inventor 张传玲姜志浩刘江涛卢兵荣李昊
Owner HEFEI UNIV OF TECH
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