Unlock instant, AI-driven research and patent intelligence for your innovation.

Salt cavern-based aqueous organic flow battery system

A flow battery and system technology, applied in fuel cells, regenerative fuel cells, circuits, etc., can solve problems such as hidden dangers, low Coulomb efficiency, and limited solubility of active materials, and achieve stable charge and discharge performance, high safety performance, and high solubility. Effect

Active Publication Date: 2021-03-02
CHINASALT JINTAN
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering the limited vanadium ore resources and high vanadium ore prices in the world (V 2 o 5 , $20 / kg), the popularization and long-term use of vanadium redox flow batteries are difficult to achieve
Vanadium flow batteries and zinc-bromine flow batteries are traditional flow battery technologies, which have some technical defects: such as self-discharge and low Coulombic efficiency caused by the shuttle effect of active materials between electrodes; corrosive electrolytes are not environmentally friendly and safe Hidden danger
[0005] At present, aqueous liquid flow batteries still face some challenges, such as limited solubility of active materials (organic substances), easy cross-contamination of electrolyte, low operating current density, and prone to water electrolysis side reactions, etc.

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
  • Salt cavern-based aqueous organic flow battery system
  • Salt cavern-based aqueous organic flow battery system
  • Salt cavern-based aqueous organic flow battery system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The negative electrode active material in the negative electrode electrolyte solution 23 is 0.1mol L -1 riboflavin, the positive electrode active material in the positive electrode electrolyte solution 22 is 0.2mol L -1 TEMPO, the supporting electrolyte in the positive electrolyte 22 and the negative electrolyte 23 are both 2.5mol L -1 Sodium chloride solution, the pH regulator NaOH was used to adjust the pH of the solution to 10.0, and the coulombic efficiency, voltage efficiency and energy efficiency of the single cell of the salt cavern-based aqueous system organic flow battery system (Ⅰ) were assembled as shown in Table 1 shown.

Embodiment 2

[0076] The negative electrode active material in the negative electrode electrolyte solution 23 is 0.1mol L -1 riboflavin, the positive electrode active material in the positive electrode electrolyte solution 22 is 0.2mol L -1 TEMPO, the supporting electrolyte in the positive electrolyte 22 and the negative electrolyte 23 are both 2.5mol L -1 Sodium chloride solution, using the pH regulator NaOH to adjust the pH of the solution to 10.5, the coulombic efficiency, voltage efficiency and energy efficiency of the single cell of the salt cavern-based aqueous system organic flow battery system (II) assembled are shown in Table 1 shown.

Embodiment 3

[0078] The negative electrode active material in the negative electrode electrolyte solution 23 is 0.1mol L -1 riboflavin, the positive electrode active material in the positive electrode electrolyte solution 22 is 0.2mol L -1 TEMPO, the supporting electrolyte in the positive electrolyte 22 and the negative electrolyte 23 are both 2.5mol L -1 Sodium chloride solution, using the pH regulator NaOH to adjust the pH of the solution to 9.5, the coulombic efficiency, voltage efficiency and energy efficiency of the single cell of the salt cavern-based aqueous system organic flow battery system (Ⅲ) assembled are shown in Table 1 shown.

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
pore sizeaaaaaaaaaa
pore sizeaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a water phase system organic flow cell system based on salt holes, which comprises two electrolyte storage warehouses that are salt holes with physical soluble cavities formedby exploring a salt mine. An electrolyte is stored in the soluble cavity. The electrolyte comprises a positive active material, a negative active material and a supporting electrolyte. The positive active material is a 2,2,6,6-tetramethyl piperidine oxynitride compound. The negative active material is an alloxazin compound or riboflavin. The positive and negative active materials are directly dissolved or dispersed in a system taking water as a solvent in a form of a body, and the supporting electrolyte is dissolved in the system. A flow cell pile is communicated with the two electrolyte storage warehouses, separately. The water phase system organic flow cell system based on salt holes not only has the advantages of low cost, high safety performance, stable charge and discharge performance, high solubility of the active materials and the like, but also can solve the problem of electrochemical energy storage on a large scale, and some waste salt hole resources are fully used.

Description

technical field [0001] The invention belongs to the field of liquid flow batteries, and in particular relates to an organic liquid flow battery system based on a salt cave in an aqueous phase system, and the battery system can be applied to large-scale chemical energy storage. Background technique [0002] With the rapid development of the human economy, the problems of environmental pollution and energy shortage are becoming more and more serious, which has prompted countries all over the world to extensively develop and utilize renewable energy such as wind energy, solar energy, and tidal energy. However, these renewable energy sources are discontinuous, unstable, restricted by regional environment, and difficult to connect to the grid, resulting in low utilization rate, high wind and light abandonment rate, and waste of resources. Therefore, it is necessary to vigorously develop efficient, cheap, safe and reliable energy storage technology that can be used in conjunction ...

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 Patents(China)
IPC IPC(8): H01M8/18
CPCH01M8/188Y02E60/50
Inventor 陈留平徐俊辉韩俊甜崔耀星苏志俊李丹马旭强
Owner CHINASALT JINTAN