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

Electrolyte for aqueous zinc ion battery and application thereof

A zinc-ion battery and electrolyte technology, which is applied in the direction of aqueous electrolyte, cylindrical shell battery/battery, secondary battery, etc., can solve the problem of restricting the development of water-based zinc-ion batteries, low solubility of zinc trifluoromethanesulfonate, and low voltage window and other problems, to achieve the effect of inhibiting the growth of zinc dendrites, reducing the dissolution effect, and inhibiting the decomposition

Pending Publication Date: 2020-11-06
PEKING UNIV SHENZHEN GRADUATE SCHOOL
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the use of cheap zinc sulfate solution is easy to produce zinc dendrites and basic zinc sulfate Zn 4 (OH) 6 (SO 4 ) 4 ·nH 2 O and other by-products; although the use of zinc trifluoromethanesulfonate solution can reduce the generation of zinc dendrites, it is expensive; and the solubility of zinc sulfate and zinc trifluoromethanesulfonate is low, causing their voltage window to be biased. Low, prone to more side reactions, limiting the development of aqueous zinc-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
  • Electrolyte for aqueous zinc ion battery and application thereof
  • Electrolyte for aqueous zinc ion battery and application thereof
  • Electrolyte for aqueous zinc ion battery and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The specific composition of the aqueous electrolyte in this example is water and electrolyte, and the electrolyte is composed of high-concentration supporting electrolyte salt and zinc salt, wherein the high-concentration supporting electrolyte salt is lithium acetate, and the zinc salt is zinc acetate. The preparation method of the electrolyte in this example includes: weighing each component according to the molar concentration of lithium acetate of 15 mol / kg and the molar concentration of zinc acetate of 0.3 mol / kg, and dissolving them in water to obtain the water-based electrolytic solution of this example. Liquid, labeled as high-concentration supporting electrolyte salt electrolyte.

[0037] In order to compare the zinc dendrite inhibition effect of the electrolyte, this example prepared electrolytes with the same components and different concentrations for comparison. The composition and concentration are: lithium acetate 1mol / kg, zinc acetate 0.3mol / kg, marked as...

Embodiment 2

[0046] The specific composition of the aqueous electrolyte in this example is water and electrolyte, and the electrolyte is composed of a high-concentration supporting electrolyte salt and a zinc salt, wherein the high-concentration supporting electrolyte salt is potassium acetate, and the zinc salt is zinc acetate. The preparation method of the electrolyte in this example includes: weighing the components according to the molar concentration of potassium acetate of 30 mol / kg and the molar concentration of zinc acetate of 1 mol / kg, and dissolving them in water to obtain the aqueous electrolyte of this example , labeled as a high-concentration supporting electrolyte salt electrolyte.

[0047] In order to compare the zinc dendrite inhibition effect of the electrolyte, this example prepared electrolytes with different concentrations of the same components used for comparison, the composition and concentration of which are: potassium acetate 1mol / kg, zinc acetate 1mol / kg, marked as...

Embodiment 3

[0054] The specific composition of the water-based electrolyte in this example is water, ammonium acetate and zinc trifluoromethanesulfonate. The electrolyte salt is dissolved in water and configured to the required mass molar concentration, wherein ammonium acetate is a high-concentration supporting electrolyte salt. It is 25mol / kg; zinc trifluoromethanesulfonate is a zinc salt, and its concentration is 0.5mol / kg.

[0055] The same method as in Example 1 was used to observe the growth of dendrites on the surface of the zinc sheet using the aqueous electrolyte of this example. The results show that the surface of the zinc sheet using the high-concentration ammonium acetate aqueous electrolyte of this example is smooth and there is no obvious dendrite growth.

[0056] Using the same method as in Example 1, the electrochemical window test was performed on the aqueous electrolyte solution of this example. The results show that the electrochemical window of the high-concentration...

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 an electrolyte for an aqueous zinc ion battery and application thereof. The electrolyte for the aqueous zinc ion battery comprises solvent water and electrolyte, and the electrolyte is composed of high-concentration supporting electrolyte salt and zinc salt; the mass molar concentration of the high-concentration supporting electrolyte salt is not less than 10 mol / kg, and the high-concentration supporting electrolyte salt is selected from at least one of lithium acetate, potassium acetate, ammonium acetate and sodium perchlorate. According to the electrolyte disclosed bythe invention, a large amount of water molecules are consumed and the electrochemical activity of the water molecules is reduced by utilizing a strong solvation effect of high-concentration supporting electrolyte salt and solvent water molecules; therefore, hydration of zinc ions is reduced, corrosion dissolution of the zinc negative electrode is reduced, and decomposition of water molecules on the surface of the electrode is inhibited; the effects of reducing hydrogen evolution reaction and reducing zinc dissolution are achieved. The electrolyte provided by the invention can effectively inhibit zinc ions from forming zinc dendrites in dissolution and deposition, and inhibits the growth of the zinc dendrites; the electrochemical window of the electrolyte is improved, and the cycle life ofthe aqueous zinc ion battery is prolonged.

Description

technical field [0001] The present application relates to the field of aqueous zinc-ion batteries, in particular to an electrolyte for aqueous zinc-ion batteries and its application. Background technique [0002] Lithium-ion batteries are currently the most deeply researched energy storage technology, and they occupy a dominant position in the application field of lithium-ion secondary batteries from portable electronic products, such as mobile phones, power tools, etc., to automobiles. However, the high cost of lithium, limited reserves and safety issues of lithium-ion batteries limit its development and application. [0003] Aqueous zinc-ion batteries are considered to be one of the most promising energy storage systems due to their high theoretical capacity, low cost, environmental protection, and safety, and have received extensive attention and in-depth research in recent years. The electrolyte of aqueous zinc-ion batteries generally adopts zinc sulfate or zinc trifluo...

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): H01M10/38H01M10/36H01M10/42H01M10/04
CPCH01M10/36H01M10/38H01M10/4235H01M10/0427H01M2300/0002H01M2300/0088Y02E60/10Y02P70/50
Inventor 李锐邓文君
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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