CN106654333A - Electrolyte stabilizing agent for all-vanadium redox flow battery and preparation method for electrolyte stabilizing agent - Google Patents
Electrolyte stabilizing agent for all-vanadium redox flow battery and preparation method for electrolyte stabilizing agent Download PDFInfo
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- CN106654333A CN106654333A CN201610993922.6A CN201610993922A CN106654333A CN 106654333 A CN106654333 A CN 106654333A CN 201610993922 A CN201610993922 A CN 201610993922A CN 106654333 A CN106654333 A CN 106654333A
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- flow battery
- redox flow
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- stabilizer
- vanadium redox
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 50
- 239000003381 stabilizer Substances 0.000 title claims abstract description 39
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 24
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 22
- 125000000524 functional group Chemical group 0.000 claims abstract description 16
- 235000011187 glycerol Nutrition 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 7
- 239000011259 mixed solution Substances 0.000 claims abstract description 7
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000012153 distilled water Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 125000003368 amide group Chemical group 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 230000002045 lasting effect Effects 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 229910001456 vanadium ion Inorganic materials 0.000 abstract description 12
- 238000006116 polymerization reaction Methods 0.000 abstract description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000013049 sediment Substances 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 14
- 239000000654 additive Substances 0.000 description 10
- 230000000996 additive effect Effects 0.000 description 9
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 8
- 230000003068 static effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 150000008065 acid anhydrides Chemical class 0.000 description 3
- 150000003926 acrylamides Chemical class 0.000 description 3
- 150000001408 amides Chemical class 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 2
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 2
- 150000002689 maleic acids Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000006259 organic additive Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 229930091371 Fructose Natural products 0.000 description 1
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 description 1
- 229930195725 Mannitol Natural products 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229910052936 alkali metal sulfate Inorganic materials 0.000 description 1
- OBESRABRARNZJB-UHFFFAOYSA-N aminomethanesulfonic acid Chemical compound NCS(O)(=O)=O OBESRABRARNZJB-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- -1 electrode Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229960002737 fructose Drugs 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 229960001855 mannitol Drugs 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229940098779 methanesulfonic acid Drugs 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 229940045136 urea Drugs 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Fuel Cell (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
Abstract
The invention provides an electrolyte stabilizing agent for an all-vanadium redox flow battery and a preparation method for the electrolyte stabilizing agent. The stabilizing agent comprises a carboxyl functional group and an amino functional group. The preparation method comprises the following steps of mixing maleic anhydride, acrylamide, glycerine and distilling water to obtain a mixed solution; taking out a part of the mixed solution for use; and stirring and heating the residual mixed solution, dropwise adding hydrogen peroxide and the mixed solution for use, and cooling to obtain the electrolyte stabilizing agent for the all-vanadium redox flow battery. The stabilizing agent can supply the carboxyl functional group which can generate chelating with pentavalent vanadium ions and the amino functional group which has an adsorption effect on the pentavalent vanadium ions, so that self polymerization of the pentavalent vanadium ions can be effectively prevented or restrained, generation of sediments can be prevented, and the stability of the electrolyte can be effectively improved.
Description
Technical field
The invention belongs to all-vanadium flow battery field, it relates in particular to a kind of all-vanadium redox flow battery electrolyte stabilizer
And preparation method thereof.
Background technology
All-vanadium flow battery (referred to as full vanadium cell or vanadium cell) is with its energy conversion efficiency height, long service life, capacity
Can require to adjust according to user, high security and advantages of environment protection and the regenerative resource such as the wind energy that becomes, solar energy and electricity
One of most promising methods of scale energy storage such as energy peak clipping, Fill valley.All-vanadium flow battery generally by electrolyte, electrode,
Fluid reservoir etc. is constituted, and affects the factor of its performance more, but the performance impact of electrolyte is the most obvious.Due to all-vanadium flow battery
Increasingly develop to extensive, Large Copacity, thus electrolyte also keeps in mind high concentration development.However, working as anode electrolyte pentavalent vanadium
When ion concentration is higher, due to the self-polymerization of pentavalent vanadium ion, it is easy to cause crystallization, the stability of electrolyte is affected.Cause
This, adds some that the additive of pentavalent vanadium ion self-polymerization can be prevented effectively to improve stablizing for anode electrolyte
Property.
At present, in order to suppress the precipitation of pentavalent vanadium, people that inorganic or organic additive is generally added in electrolyte.It is conventional
Inorganic additive have the inorganic acids such as sodium hexametaphosphate, alkali metal sulfates, boric acid, hydrochloric acid.Organic additive has urea, fruit
Sugar, mannitol, methanesulfonic acid and aminomethyl sulfonic acid, trifluoroacetic acid, polyacrylic acid, oxalic acid, methacrylic acid, citric acid, ethylenediamine
The organic acids such as tetraacethyl (EDTA).However, the membership that adds of these additives introduces some impurity elements, some impurity elements can change
The acidity of change system, being likely to result in the corrosive power of electrolyte strengthens, the service life for affecting pile overall.
The content of the invention
For the deficiencies in the prior art, an object of the present invention is to solve present in above-mentioned prior art
One or more problems.For example, an object of the present invention is to provide one kind to improve all-vanadium flow battery anolyte
Liquid stability and do not change the stabilizer of electrolyte system acidity.
To achieve these goals, an aspect of of the present present invention provides a kind of system of all-vanadium redox flow battery electrolyte stabilizer
Preparation Method, the preparation method is comprised the following steps：
By distilled water with mass ratio be 6:1:1～6:6:1 maleic anhydride, acrylamide, glycerine are well mixed, and obtain
To the first mixed liquor, wherein, the volume of the distilled water accounts for the 70% of prepared stabilizer volume；Take out the first mixeding liquid volume
15%～30% be the second mixed liquor, raffinate be the 3rd mixed liquor；The 3rd mixed liquor is stirred and heats, to the 3rd mixed liquor
Hydrogen peroxide is slowly added dropwise, after completion of dropping, the 4th mixed liquor is obtained, wherein, the heating-up temperature is 70 DEG C～90 DEG C；Continuing
Under stirring state, the second mixed liquor is slowly dropped in the 4th mixed solution, and it is incubated 1.5 hours at 70 DEG C～90 DEG C～
Cool down after 2.5 hours, obtain all-vanadium redox flow battery electrolyte stabilizer.
A kind of stabilizer of all-vanadium redox flow battery electrolyte is another aspect provides, the stabilizer contains carboxylic
Base functional group and amido functional group.
Compared with prior art, beneficial effects of the present invention include：
(1) stability of positive electrolyte for all-vanadiumredox flow battery is improved.Using the carboxyl in additive prepared by the present invention
Functional group effectively can chelate with pentavalent vanadium ion, and the amino Guan Nengtuan for containing simultaneously can produce strong absorption to pentavalent vanadium and make
With, the self-polymerization of pentavalent vanadium ion can be effectively prevented or suppress, the precipitation for preventing is produced, and effectively increases anolyte
The stability of liquid.
(2) ensure the overall acidity of positive electrolyte for all-vanadiumredox flow battery without impact.The additive energy of the present invention will likely
Affect the hydrogen ion in the carboxylic acid in all-vanadium flow battery life-span to dispose, therefore do not interfere with the overall acidity of electrolyte.And
And on the service life of all-vanadium flow battery heap without impact, to other critical materials such as film, collector etc. of pile also without special
Require.
(3) ensure the viscosity of positive electrolyte for all-vanadiumredox flow battery without impact.The raw material that the stabilizer of the present invention is used
For the relatively low organic material of molecular weight, and by substep add the monomer of reaction it is appropriate control the viscous of product after polymerization
Degree, it is ensured that on the viscosity of anode electrolyte without impact after addition.
(4) Additive Production operation and method of the invention are simple to operate, are easier to realize industrialized production, while to environment
It is friendly.
Specific embodiment
Hereinafter, all-vanadium redox flow battery electrolyte of the invention will be described in detail with reference to exemplary embodiment steady
Determine agent and preparation method thereof.
Generally, maleic anhydride, acrylamide and glycerine are passed through itself emulsion synthesis method system by the inventive method
It is standby to obtain the stabilizer containing carboxyl functional group and amido functional group.The carboxyl functional group contained in stabilizer can be with electrolyte
In vanadium ion chelating, the amido functional group for containing simultaneously can pass through strong suction-operated absorption electrolyte in vanadium ion, two
Person's synergy can effectively prevent the autohemagglutination of pentavalent vanadium ion, prevent it from precipitating, and improve the stability of electrolyte.Also,
The stabilizer for obtaining prepared according to the methods of the invention can shield the hydrogen ion or impurity element that may change electrolyte system, protect
The service life of battery is demonstrate,proved.
In one exemplary embodiment of the present invention, the preparation method of all-vanadium redox flow battery electrolyte stabilizer includes
Following steps：
1) it is 1 by mass ratio:6:1～1:6:6 glycerine, maleic anhydride and acrylamide are added separately to distilled water
In, it is well mixed, obtain the first mixed liquor.Wherein, the volume of distilled water accounts for the 70% of prepared stabilizer.
More than, in order to reach the purpose for being well mixed mixed liquor, for example, the mode of stirring can be used to carry out mixed liquor
Mixing is processed, however, the invention is not restricted to this.Other can make the mode that mixed liquor is well mixed also may be used.Preferably, can be
After stirring 10 minutes～20 minutes under 150～300 revs/min of rotating speed, 5 minutes are stood, obtain the first mixed liquor.
2) it is the second mixed liquor to take out the 15%～30% of the first mixeding liquid volume, and raffinate is the 3rd mixed liquor；
3) while stirring, then slow the 3rd mixeding liquid temperature that raises is added dropwise hydrogen peroxide to 70 DEG C～90 DEG C, drips
Bi Hou, obtains the 4th mixed liquor.
More than, it is preferred that the addition of the hydrogen peroxide is the 1%～5% of prepared stabilizer volume.In order that reaction
Effect is optimum, and the mass concentration of the hydrogen peroxide can be more than 30%.
4) while stirring, the second mixed liquor is slowly dropped in the 4th mixed solution, is stirred at 70 DEG C～90 DEG C
After insulation 1.5 hours～2.5 hours, while stirring, room temperature is cooled to, obtains all-vanadium redox flow battery electrolyte and use stable
Agent.
In another exemplary embodiment of the invention, all-vanadium redox flow battery electrolyte stabilizer contain carboxyl functional group and
Amido functional group.
The exemplary embodiment of the present invention is further described below in conjunction with specific example.
Embodiment 1
Prepare 100mL stabilizers.95ml distilled water is added in beaker, 3g glycerine, 18g maleic acids is then respectively adding
Acid anhydride and 9g acrylamides.At normal temperatures, mixed liquor is stirred 20 minutes, then static 5 minutes with 150 revs/min of speed.Will
Mixed liquor after static is divided into two parts, and a portion is 15mLA solution, and another part is 85mLB solution.At 150 revs/min
Under the rotating speed of clock, B solution is heated into 70 DEG C, adds 20ml concentration to be 30% hydrogen peroxide, add speed for per second 1 drop.Then
Solution A is added drop-wise in the solution of above-mentioned addition hydrogen peroxide with the speed of per second 2 drops, after completion of dropping, under conditions of 70 DEG C
Insulation 1.5 hours, adjustment rotating speed is cooled to room temperature to 120 revs/min, obtains stabilizer.
Volume is added to carry out acid anhydrides-propylene for electrolyte 1.5% in concentration containing vanadium is for the anode electrolyte of 1.9mol/L
The glycerine resin copolymer additive of acid amides, after stirring, is put into 55 DEG C of climatic chambers 200 days without precipitation, room temperature
Without precipitation, the kinematic viscosity of electrolyte is unchanged before and after addition within 360 days, and assembled battery carries out discharge and recharge 100 times, its average coulomb
Efficiency is 92.3%, and energy efficiency is 84.2%.
Embodiment 2
Prepare 100mL stabilizers.95ml distilled water is added in beaker, 5g glycerine, 30g maleic acids is then respectively adding
Acid anhydride and 5g acrylamides.At normal temperatures, mixed liquor is stirred 15 minutes, then static 8 minutes with 200 revs/min of speed.Will
Mixed liquor after static is divided into two parts, and a portion is 20mLA solution, and another part is 80mLB solution.At 220 revs/min
Under the rotating speed of clock, B solution is heated into 80 DEG C, adds 50% hydrogen peroxide of 1mol, add speed for per second 2 drops.Then it is A is molten
Liquid is added drop-wise in the solution of above-mentioned addition hydrogen peroxide with the speed of per second 2 drops, after completion of dropping, under conditions of 80 DEG C 2 is incubated
Hour, adjustment rotating speed is cooled to room temperature to 180 revs/min, obtains stabilizer.
Volume ratio is added to carry out acid anhydrides-propylene for electrolyte 3% in concentration containing vanadium is for the anode electrolyte of 2.0mol/L
The glycerine resin copolymer additive of acid amides, after stirring, is put into 55 DEG C of climatic chambers 200 days without precipitation, room temperature
Without precipitation, the kinematic viscosity of electrolyte is unchanged before and after addition within 360 days, and assembled battery carries out discharge and recharge 100 times, its average coulomb
Efficiency is 91.5%, and energy efficiency is 82.6%.
Embodiment 3
Prepare 150mL stabilizers.145ml distilled water is added in beaker, 5g glycerine, 30g Malaysias is then respectively adding
Acid anhydrides and 30g acrylamides.At normal temperatures, mixed liquor is stirred 20 minutes, then static 10 points with 300 revs/min of speed
Clock.Mixed liquor after will be static is divided into two parts, and a portion is 45mLA solution, and another part is 105mLB solution.
Under 300 revs/min of rotating speed, B solution is heated into 90 DEG C, adds 5mol hydrogen peroxide, add speed for per second 1 drop.Then by A
Solution is added drop-wise in the solution of above-mentioned addition hydrogen peroxide with the speed of per second 2 drops, after completion of dropping, is incubated under conditions of 90 DEG C
2.5 hours, adjustment rotating speed was cooled to room temperature to 200 revs/min, obtains stabilizer.
Volume ratio is added to carry out acid anhydrides-propylene for electrolyte 4% in concentration containing vanadium is for the anode electrolyte of 2.2mol/L
The glycerine resin copolymer additive of acid amides, after stirring, is put into 55 DEG C of climatic chambers 200 days without precipitation, room temperature
Without precipitation, the kinematic viscosity of electrolyte is unchanged before and after addition within 360 days, and assembled battery carries out discharge and recharge 100 times, its average coulomb
Efficiency is 90.2%, and energy efficiency is 80.1%.
In sum, the additive that the present invention is prepared can be provided and produce chelating and to pentavalent vanadium with pentavalent vanadium ion
Ion has strong adsorbing functional group, can effectively prevent or suppress pentavalent vanadium ion self-polymerization, prevents the product for precipitating
It is raw, effectively improve the stability of anode electrolyte.
Although above by describing the present invention with reference to exemplary embodiment, those skilled in the art should be clear
Chu, in the case of the spirit and scope limited without departing from claim, can be carried out respectively to the exemplary embodiment of the present invention
Plant modifications and changes.
Claims (6)
1. a kind of preparation method of all-vanadium redox flow battery electrolyte stabilizer, it is characterised in that the preparation method includes following
Step：
By distilled water with mass ratio be 6:1:1～6:6:1 maleic anhydride, acrylamide, glycerine are well mixed, and obtain
One mixed liquor, wherein, the volume of the distilled water accounts for the 70% of prepared stabilizer volume；
It is the second mixed liquor to take out the 15%～30% of the first mixeding liquid volume, and raffinate is the 3rd mixed liquor；
The 3rd mixed liquor is stirred and heated, to the 3rd mixed liquor hydrogen peroxide is slowly added dropwise, after completion of dropping, obtain the 4th mixing
Liquid, wherein, the heating-up temperature is 70 DEG C～90 DEG C；
Under lasting stirring state, the second mixed liquor is slowly dropped in the 4th mixed solution, and in 70 DEG C～90 DEG C insulations
Cool down after 1.5 hours～2.5 hours, obtain all-vanadium redox flow battery electrolyte stabilizer.
2. the preparation method of all-vanadium redox flow battery electrolyte stabilizer according to claim 1, it is characterised in that it is described plus
Hot temperature is 80 DEG C.
3. the preparation method of all-vanadium redox flow battery electrolyte stabilizer according to claim 1, it is characterised in that the guarantor
The temperature of temperature is 80 DEG C, and the time of insulation is 1.5 hours～2.5 hours.
4. the preparation method of all-vanadium redox flow battery electrolyte stabilizer according to claim 1, it is characterised in that described double
The addition of oxygen water is the 1%～5% of prepared stabilizer volume.
5. the preparation method of all-vanadium redox flow battery electrolyte stabilizer according to claim 1, it is characterised in that described cold
Mixing speed when but is 120～200 revs/min.
6. a kind of stabilizer of all-vanadium redox flow battery electrolyte, it is characterised in that the stabilizer contain carboxyl functional group and
Amido functional group.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470927A (en) * | 2018-03-20 | 2018-08-31 | 湖南工程学院 | A kind of preparation method and applications of high-energy density V electrolyte |
| CN111477925A (en) * | 2020-06-08 | 2020-07-31 | 雅安市中甫新能源开发有限公司 | Additive for preparing high-concentration vanadium battery electrolyte and preparation method |
| WO2020174062A1 (en) * | 2019-02-28 | 2020-09-03 | Ip2Ipo Innovations Limited | Redox flow cell |
| CN117673424A (en) * | 2023-12-29 | 2024-03-08 | 浙江聚合储能科技有限公司 | Electrolyte and preparation method thereof |
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| CN101110481A (en) * | 2006-07-19 | 2008-01-23 | 中国科学院金属研究所 | Method for preparing all vanadium ion redox flow battery electrolyte |
| CN104269572A (en) * | 2014-10-13 | 2015-01-07 | 四川长虹电源有限责任公司 | Preparation method of vanadium redox flow battery electrolyte optimized by compound stabilizer |
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| CN108470927A (en) * | 2018-03-20 | 2018-08-31 | 湖南工程学院 | A kind of preparation method and applications of high-energy density V electrolyte |
| CN108470927B (en) * | 2018-03-20 | 2020-09-11 | 湖南工程学院 | Preparation method and application of high-energy-density vanadium electrolyte |
| WO2020174062A1 (en) * | 2019-02-28 | 2020-09-03 | Ip2Ipo Innovations Limited | Redox flow cell |
| CN111477925A (en) * | 2020-06-08 | 2020-07-31 | 雅安市中甫新能源开发有限公司 | Additive for preparing high-concentration vanadium battery electrolyte and preparation method |
| CN111477925B (en) * | 2020-06-08 | 2023-01-10 | 雅安市中甫新能源开发有限公司 | Additive for preparing high-concentration vanadium battery electrolyte and preparation method |
| CN117673424A (en) * | 2023-12-29 | 2024-03-08 | 浙江聚合储能科技有限公司 | Electrolyte and preparation method thereof |
| CN117673424B (en) * | 2023-12-29 | 2024-04-30 | 浙江聚合储能科技有限公司 | Electrolyte and preparation method thereof |
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