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Semi-solid flow cell

A flow battery, semi-solid technology, used in regenerative fuel cells, sustainable manufacturing/processing, climate sustainability, etc., can solve problems such as low current density of flow batteries, increase electrode reaction area, and reduce manufacturing costs. , the effect of reducing the contact resistance

Active Publication Date: 2013-08-14
南京竞予能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of low current density of the current flow battery, the present invention provides a new type of semi-solid flow battery. The key is to add solid electrode particles to the electrolyte of the semi-solid flow battery to form an electrode suspension

Method used

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Embodiment 1

[0049] This embodiment provides a semi-solid all-vanadium redox flow battery.

[0050] A semi-solid all-vanadium redox flow battery, the semi-solid all-vanadium redox flow battery can reach a current density of 400mA / cm 2 . Among them, the positive electrolyte is VOSO 4 sulfuric acid solution, the negative electrolyte is V 2 (SO 4 ) 3 sulfuric acid solution, the active material is vanadium ions of different valence states dissolved in the electrolyte, wherein the concentration of sulfuric acid is preferably 1.5-3 mol / L, and the molar ratio of V and S elements is 1:2-3.

[0051] In this embodiment, the solid electrode particles added to the electrolyte of the semi-solid all-vanadium redox flow battery are mixed powders of graphite powder, activated carbon black powder and multi-walled carbon nanotubes.

[0052] The mixed powder preparation process is as follows:

[0053] 1) Put the hard carbon black in an environment filled with argon protective gas, and graphitize it at ...

Embodiment 2

[0060] This embodiment provides a semi-solid all-vanadium redox flow battery.

[0061] The difference from Example 1 is that the solid electrode particles added in the electrolyte are acetylene black particles loaded with tungsten oxide, and the preparation process is as follows:

[0062] 1) Heat acetylene black in a heating device at a heating rate of 5°C / min to 800°C and keep it warm for 2 hours. After cooling to room temperature naturally, wash, filter and dry with distilled water;

[0063] 2) Add 1.4g Na 2 WO 4 2H 2 Dissolve O in 14mL water, prepare a sodium tungstate solution with a mass concentration of 9%, add 1g of oxidized acetylene black, and add 16mL of 4mol / L hydrochloric acid dropwise at a speed of 3mL / min under magnetic stirring, and the solution pH=1 After adding all the hydrochloric acid and continuing to stir for 0.5h, stand and age at room temperature for 12 hours, then carry out suction filtration, washing, and drying;

[0064] 3) Then put it into the mu...

Embodiment 3

[0067] This embodiment provides a semi-solid sodium polysulfide-bromine flow battery.

[0068] A semi-solid sodium polysulfide-bromine flow battery, wherein the positive electrode electrolyte of the battery is an aqueous solution of sodium bromide (NaBr), and the added solid electrode particles are activated carbon particles with a volume content of 10%-50%; the negative electrode electrolyte Sodium polysulfide (Na 2 S x ) aqueous solution, the added solid electrode particles are carbon powder with cobalt or nickel on the surface, and the volume content is 10%-50%.

[0069] After the solid electrode particles are added to the electrolyte, they are dispersed by ultrasound to form a uniform and stable semi-solid suspension, which are stored in the positive and negative liquid storage tanks respectively, and connected to the battery stack through sealed pipes to form a circulation loop.

[0070] The positive and negative reaction chambers of the battery are separated by a catio...

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Abstract

The invention discloses a semi-solid flow cell which is provided with a cell stack formed by parallel connection of one individual cell or multiple individual cells, wherein at least one of a positive pole electrolyte and a negative pole electrolyte comprises solid electrode particles to form an electrode suspension liquid; the surfaces of the solid electrode particles have catalytic activity; and active substances dissolved in the electrolytes can have an electrochemical oxidation or reduction reaction on the surfaces of the particles. Because the solid electrode particles can enlarge electrochemical oxidation area of the active substances in the electrolytes but not participate in the electrochemical oxidation, a current collector of the semi-solid flow cell does not need to have catalytic activity, so that the manufacturing cost is greatly reduced; and meanwhile, the solid electrode particles have good conductivity for collecting current generated in the electrochemical reaction, so as to form a conductive network. According to the invention, the work current density of the cell can be increased, the multiplying power performance of the cell can be improved, the size of a cell module is reduced, and the manufacturing cost of the cell can be lowered.

Description

technical field [0001] The invention belongs to the technical field of chemical energy storage batteries, in particular to a liquid flow battery system. Background technique [0002] The development and application of renewable energy such as solar energy and wind energy is an effective way to solve the problems of energy supply and environmental protection in today's society, but it is restricted by its volatility, intermittent and dispersed characteristics, which affects the wide application of renewable energy technology. Driven by the market demand for power generation technology and smart grid construction, flow batteries have received more and more attention. [0003] The redox flow battery, also known as the redox flow battery, is a large-scale high-efficiency electrochemical energy storage device, which realizes the mutual conversion and energy storage of electrical energy and chemical energy through the change of the valence state of the reactive material. The curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCY02E60/528Y02E60/50Y02P70/50
Inventor 陈永翀冯彩梅张艳萍任雅琨韩立张萍王秋平
Owner 南京竞予能源有限公司
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