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

Zinc-nickel/air hybrid flow battery system

A flow battery and hybrid technology, applied in fuel cells, battery electrodes, regenerative fuel cells, etc., can solve the problems of poor battery energy density and poor stability, and achieve solutions to poor stability, increase energy density, and widen the system. Effect

Inactive Publication Date: 2018-03-06
BEIJING UNIV OF CHEM TECH
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of incomplete discharge of zinc and poor stability of carbon-based electrode caused by oxygen evolution reaction, the positive electrode adopts divalent nickel compound and oxygen reduction composite electrode. The oxidation-reduction reaction not only solves the problem of poor stability caused by incomplete zinc discharge and oxygen evolution reaction damage to carbon-based electrodes, but also increases the energy density of the battery and broadens the system of flow battery application systems

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
  • Zinc-nickel/air hybrid flow battery system
  • Zinc-nickel/air hybrid flow battery system
  • Zinc-nickel/air hybrid flow battery system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Electrolyte preparation:

[0035] Weigh 44.896g of KOH and 4.08g of ZnO, dissolve in deionized water, and set the volume to 100mL to prepare an alkaline zincate aqueous solution.

[0036] Positive electrode preparation:

[0037] A 3cm×3cm hydrophobic carbon paper is used as a current collector, and nickel hydroxide active material is coated on one side, and an oxygen reduction catalyst layer and a gas diffusion layer are coated on the other side. The specific preparation process is as follows:

[0038] Weigh 9mg of 40wt% Pt / C and 90mg of 0.5wt% Nafion solution in a reagent bottle with a balance, then add an appropriate amount of ethanol, and sonicate for 10 minutes. Spray the prepared slurry on one side of the carbon paper collector to act as an oxygen reduction catalytic layer.

[0039] Use a balance to weigh 48mg of acetylene black into a reagent bottle, then add 48mg of PTFE, then add an appropriate amount of ethanol, ultrasonicate for 30min, and stir for 30min. T...

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 zinc-nickel / air hybrid flow battery system and relates to an energy storage technology of a flow battery. The zinc-nickel / air hybrid flow battery system comprises single batteries or a battery module formed by two or more single batteries, a liquid storage tank, a circulating pump and a pipeline, wherein each single battery comprises a positive electrode, a frame and a negative electrode; a composite electrode of a bivalent nickel compound layer and an oxygen reduction layer is adopted by each positive electrode; an electrolyte is an alkaline zincate water solution and is transferred into each frame when charged; an active material bivalent nickel on each positive electrode is oxidized into trivalent nickel and oxygen evolution reaction is carried out; and zinc ions in the electrolyte are deposited on each negative electrode in a form of a zinc element. The trivalent nickel on each positive electrode is reduced into bivalent oxide or hydroxide of nickel when discharged, and then subjected to oxygen reduction reaction; and the zinc element on each negative electrode is oxidized into the zinc ions to return to the liquid storage tank. According to the flow battery, the problems of incomplete zinc discharge and poor stability caused by the damage of the oxygen evolution reaction to a carbon-based electrode are solved, the energy density of the battery isimproved and the system of an application system of the flow battery is expanded.

Description

technical field [0001] The invention relates to a flow battery energy storage technology, in particular to a zinc-nickel / air hybrid flow battery system. technical background [0002] The development and utilization of renewable energy such as solar energy, wind energy and tidal energy cannot do without efficient and large-scale energy storage equipment. Among many energy storage devices, flow batteries have become one of the most promising energy storage devices due to their low cost, high efficiency, long life, and no geographical constraints. Patent CN101127393A invents a zinc-nickel flow battery, which uses nickel hydroxide or nickelous oxide as the positive electrode, deposited zinc as the negative electrode, and strongly alkaline zincate aqueous solution as the electrolyte, and the flowing electrolyte improves material transfer The process slows down the concentration polarization during the zinc deposition process, and effectively improves the dendrite and deformation...

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): H01M4/86H01M8/18H01M8/2455
CPCH01M4/8657H01M8/188H01M8/2455Y02E60/50
Inventor 程元徽李东明向中华张宁远
Owner BEIJING UNIV OF CHEM 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