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

Preparation method for hollow micro-structure Co3S4@MoS2 of lithium ion battery negative electrode by MOF template

A lithium ion battery, hollow micro technology, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of volume change, large dissolved polysulfide, unsatisfactory cycle stability, and slow Li ion diffusion. , to achieve the effect of solving capacity attenuation, high success rate and easy operation

Inactive Publication Date: 2018-11-23
SOUTHWEAT UNIV OF SCI & TECH
View PDF2 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in reality, they are very easy to stack / re-stack into bulk materials, especially in the limited space for Li-ion storage at high rates
MoS 2 The biggest problem of nanosheets for flexible LIBs is that its realization is greatly hindered by their poor performance, mainly due to slow Li-ion diffusion, low electrical conductivity, and cycle stability due to large volume change and polysulfide dissolution. Unsatisfactory during cycling

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 for hollow micro-structure Co3S4@MoS2 of lithium ion battery negative electrode by MOF template
  • Preparation method for hollow micro-structure Co3S4@MoS2 of lithium ion battery negative electrode by MOF template
  • Preparation method for hollow micro-structure Co3S4@MoS2 of lithium ion battery negative electrode by MOF template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Cobalt nitrate hexahydrate (8.7364 g) was added to 300 mL of methanol respectively to form a solution and shaken for 3 minutes. 2-Methylimidazole (9.8430 g) was added to 100 mL of methanol to form a solution and shaken for 3 minutes. The two solutions were then mixed and treated with ultrasound (40000 Hz) for 10 minutes. The mixed solution was left at room temperature for 12 hours to obtain precipitation. Next, the precipitate was collected, separated by centrifugation, washed 5 times with methanol, and dried overnight at 80 °C to obtain the ZIF-67 precursor template.

[0045] Add 400 mg ZIF-67 precursor template and 200 mg dopamine into 500 mL Tris buffer solution (pH = 8, 10 mM) and stir for 5 h. The precipitate was collected by centrifugation, washed several times with deionized water and ethanol, and dried at 70 °C to obtain ZIF-67@PDA nanocubes. Finally, the ZIF-67@PDA nanocubes were annealed at 600 °C for 2 hours under Ar conditions, and the Co 3 o 4 @C sampl...

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
Resistanceaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of preparation of a nanometer material, in particular to a preparation method for a hollow micro-structure Co3S4@C@MoS2 of a lithium ion battery negative electrode by an MOF template. The method comprises the following steps of (1) preparing a ZIF-67 precursor template by a solution method; (2) coating the prepared ZIF-67 template with organic carbon ina solution; (3) performing high-temperature sintering on a product in an atmosphere furnace; (4) dispersing the sintered product in a salt solution; (5) performing hydrothermal reaction on a mixed solution, and collecting the product; (6) annealing the product to prepare a hollow Co3S4@C@MoS2-heterojunction structure. The method is simple, is convenient to operate, and is good in repeatability and high in product purity; and the prepared hollow Co3S4@C@MoS2-heterojunction structure has favorable performance when used as a lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of preparation of nanomaterials, in particular to a hollow microstructure Co 3 S 4 @C@MoS 2 method of preparation. Background technique [0002] Transition metal chalcogenides (such as SnS, MoS 2 , FeS 2 and CoS 2 ) as a promising class of anode materials with high theoretical capacity to store Li / Na ions via an electrochemical conversion mechanism. Transition metal chalcogenides generally have more favorable kinetics and higher initial Coulombic efficiencies than metal oxides compared to Mo bonds due to relatively weak ionic bonds. Among these metal chalcogenides, cobalt sulfides (such as CoS, CoS 2 ,Co 9 S 8 and Co 3 S 4 ) has received increasing attention, although most studies have focused on potential applications in Li / Na-ion batteries and supercapacitors. In fact, despite the high theoretical Li-ion storage capacity of cobalt sulfide, the cycle stability and rate performance are unsatisf...

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): H01M4/36H01M4/58H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/5815H01M4/625H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 姚卫棠戴金延张群斌刘小楠李节节
Owner SOUTHWEAT UNIV OF SCI & 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