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

Sodium-magnesium secondary battery and preparation method thereof

A magnesium secondary battery and electrolyte technology, applied in the field of sodium magnesium secondary battery and its preparation, can solve the problems of poor rate cycle performance, restricting the development of magnesium ion battery, large polarization and the like

Active Publication Date: 2016-11-16
JILIN UNIV
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of suitable cathode materials and electrolyte systems, and the strong Coulomb interaction between magnesium ions and other ions, the intercalation process of magnesium ions is slow, resulting in large polarization and rapid capacity decay during charge and discharge. The problem of poor rate cycle performance restricts the development of magnesium-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
  • Sodium-magnesium secondary battery and preparation method thereof
  • Sodium-magnesium secondary battery and preparation method thereof
  • Sodium-magnesium secondary battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] In the present invention, the preparation method of the positive electrode preferably includes the following steps: (a) adding TiS 2 , conductive aid and binding agent are mixed to obtain mixed slurry; (b) coating the mixed slurry obtained in the step (a) on a substrate to obtain a primary positive electrode; (c) drying the primary positive electrode After pressing, the positive electrode is obtained.

[0040] The present invention preferably uses TiS 2 , the conductive auxiliary agent and the binder are mixed to obtain a mixed slurry. In the present invention, the amount and type of raw materials in the mixed slurry are in accordance with the TiS mentioned in the above technical scheme 2 , conductive additives and binders. The present invention has no special requirements on the mixing method, and a mixing method well known to those skilled in the art can be used. The present invention preferably adopts the mode of manual agitation to mix described TiS 2 , conduct...

Embodiment 1

[0052] Preparation of electrolyte solution: put 1mol of sodium borohydride and 0.1mol of magnesium borohydride into a conical flask in the glove box, and add diethylene glycol dimethyl ether, under the action of a magnetic stirrer at 500r / min Stirring at high speed for 12 hours to obtain an electrolyte, the concentration of sodium borohydride in the obtained electrolyte is 1 mol / L, and the concentration of magnesium borohydride is 0.1 mol / L.

[0053] Preparation of positive electrode material: according to the mass ratio of 75:10:7 commercial TiS 2 , acetylene black and polyvinylidene fluoride are mixed in an agate mortar by manual stirring to obtain a mixed slurry, wherein the stirring rate is 100r / min, and the stirring time is 5min; the obtained mixed slurry is coated with On a 9μm stainless steel substrate, the amount of mixed slurry coating is based on the area of ​​the substrate as 3mg / cm 2 Then, the stainless steel substrate coated with the mixed slurry was dried for 10...

Embodiment 2

[0057] Prepare the electrolyte: put 0.5mol of sodium borohydride and 0.1mol of magnesium borohydride into the conical flask in the glove box, and add diethylene glycol dimethyl ether, under the action of a magnetic stirrer at 150r / min Stir at a high speed for 24 hours to obtain an electrolytic solution, the concentration of sodium borohydride in the obtained electrolytic solution is 0.5 mol / L, and the concentration of magnesium borohydride is 0.1 mol / L.

[0058] Preparation of positive electrode material: according to the mass ratio of 70:20:10 commercial TiS 2 , natural graphite and polyacrylic acid are mixed in an agate mortar by manual stirring to obtain a mixed slurry, wherein the stirring rate is 300r / min, and the stirring time is 5min; the obtained mixed slurry is coated with 10μm graphite On the foil substrate, the amount of mixed slurry coating is based on the area of ​​the substrate as 3mg / cm 2 Then, the graphite foil substrate coated with the mixed slurry was dried ...

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
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a sodium-magnesium secondary battery, which comprises a positive electrode, a negative electrode and an electrolyte, wherein the positive electrode comprises TiS2; the negative electrode is a magnesium metal; and the electrolyte is an organic solution system containing sodium ions and magnesium ions. Only the magnesium metal exists in the negative electrode and only precipitation and dissolution of the magnesium metal are carried out in the charging and discharging processes, so that the problem of poor cycle performance since a lithium metal is not easily intercalated and deintercalated is solved. The organic solution system containing the sodium ions and the magnesium ions is taken as the electrolyte of the secondary battery, so that the defects of low capacity and poor reversibility of an electrolyte battery which simply contains the magnesium ions, poor rate capability and fast capacity degradation caused by the polarization effect of the magnesium ions are improved. The organic solution system containing the sodium ions and the magnesium ions is taken as the electrolyte of the secondary battery, so that dendritic crystal caused by directly adopting metal ions is avoided and the safety is improved. The lithium metal is not used by the electrolyte and an electrode material, so that the cost of the battery is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of secondary batteries, in particular to a sodium-magnesium secondary battery and a preparation method thereof. Background technique [0002] Batteries are more and more widely used in modern society. Secondary batteries with high energy density, large capacity, high working voltage, low cost and environmental friendliness are the development direction of energy storage battery technology in the future. Lithium-ion batteries are favored by people because of their high energy density, long cycle life, high operating voltage, and wide operating temperature range. [0003] However, lithium metal is extremely active in the air, so it can be used in small-capacity secondary batteries, but it will inevitably cause safety problems when used in large-capacity storage. At the same time, the content of lithium element in nature is limited, and the price is relatively high. Studies have shown that rechargeable magnes...

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): H01M10/054H01M10/058
CPCH01M10/054H01M10/058Y02E60/10Y02P70/50
Inventor 魏英进赵赢营边筱扉陈楠杜菲陈岗
Owner JILIN 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