CN112993359A - Zinc-nickel single flow battery - Google Patents
Zinc-nickel single flow battery Download PDFInfo
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- CN112993359A CN112993359A CN201911282465.XA CN201911282465A CN112993359A CN 112993359 A CN112993359 A CN 112993359A CN 201911282465 A CN201911282465 A CN 201911282465A CN 112993359 A CN112993359 A CN 112993359A
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- 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
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- 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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04276—Arrangements for managing the electrolyte stream, e.g. heat exchange
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- 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
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Abstract
The invention discloses a zinc-nickel single flow battery, which comprises a galvanic pile and an electrolyte storage device; a battery unit is arranged in the electric pile; the battery unit comprises a positive electrode half battery and a negative electrode half battery, and a separator is arranged between the positive electrode half battery and the negative electrode half battery; the anode half cell is provided with an anode electrolyte inlet and an anode electrolyte outlet, and the cathode half cell is provided with a cathode electrolyte inlet and a cathode electrolyte outlet; the electrolyte inlet and outlet of the electrolyte storage device are respectively connected with the anode electrolyte inlet and the cathode electrolyte inlet through liquid inlet pipelines, and the electrolyte inlet of the electrolyte storage device is respectively connected with the anode electrolyte outlet and the cathode electrolyte outlet through liquid outlet pipelines. According to the invention, the separator is added between the positive half cell and the negative half cell, so that the battery units can be connected in series in multiple sections, and the positive electrolyte and the negative electrolyte in the battery units are kept separated; and meanwhile, the electrolyte of the positive electrode and the electrolyte of the negative electrode are circulated, so that the polarization of the battery is reduced, and the performance of the battery is improved.
Description
Technical Field
The invention belongs to the technical field of flow battery energy storage, and particularly relates to a zinc-nickel single flow battery.
Background
The zinc-nickel single flow battery is a novel low-cost, high-efficiency and environment-friendly flow battery energy storage technology, has the advantages of high energy density and current efficiency, simple and easy operation of the device, long service life, low cost and the like, and is mainly applied to the fields of power grid peak shaving, power generation of renewable energy sources such as wind energy and solar energy, electric vehicles and the like.
In a traditional battery unit of a zinc-nickel single flow battery, most of anodes are sintered nickel oxide electrodes, cathodes are deposited zinc electrodes on nickel foils, and the anodes and the cathodes are not separated. Because the positive and negative electrodes of the battery unit are not separated, the battery unit cannot realize multi-section series connection, and in the same flowing electrolyte which is free of physical obstruction and is conducted, all the battery units can only be connected in parallel, so that the battery capacity is too low. It is therefore modified by the person skilled in the art: the separator is added between the positive electrode and the negative electrode, the positive electrolyte is sealed in the positive half cell, and the negative electrolyte circularly flows between the negative half cell and the negative electrolyte storage device through a pipeline, so that the multiple battery units can be connected in series, and the battery capacity is greatly improved.
However, in the existing zinc-nickel single flow battery, only the negative electrolyte circulates because the positive electrolyte is sealed in the positive half cell in the battery cell. Two problems can exist with this electrolyte flow approach: firstly, because the positive electrode needs to absorb hydroxide ions from the electrolyte in the charging reaction process, the concentration of the hydroxide ions in the positive electrode half cell is reduced along with the progress of the charging reaction, and the concentration polarization of the positive electrode is increased. And secondly, due to the special single-liquid-flow structure, the anode electrolyte does not flow, and compared with the flowing of the anode electrolyte, the battery operated in the mode that the anode electrolyte does not flow can not ensure that the anode electrolyte is fully filled in the cavity of the anode half-battery all the time, so that the integral resistance of the anode is large. The above problems eventually lead to large polarization of the battery and limited battery performance.
Disclosure of Invention
In order to solve the technical problems, the invention provides a zinc-nickel single flow battery, wherein a system with separated positive and negative electrolytes is constructed by adding a separator between a positive half battery and a negative half battery, so that a battery unit can be connected in series in multiple sections, and the positive electrolyte and the negative electrolyte in the battery unit are kept separated and do not interfere with each other; meanwhile, the positive electrolyte and the negative electrolyte are circulated, so that the polarization of the battery is reduced, and the performance of the battery is improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a zinc-nickel single flow battery comprises a galvanic pile and an electrolyte storage device;
a battery unit is arranged in the electric pile;
the battery unit comprises a positive electrode half battery and a negative electrode half battery, and a separator is arranged between the positive electrode half battery and the negative electrode half battery;
the anode half cell is provided with an anode electrolyte inlet and an anode electrolyte outlet, and the cathode half cell is provided with a cathode electrolyte inlet and a cathode electrolyte outlet;
the electrolyte outlet of the electrolyte storage device is respectively connected with the anode electrolyte inlet and the cathode electrolyte inlet through liquid inlet pipelines, and the electrolyte inlet of the electrolyte storage device is respectively connected with the anode electrolyte outlet and the cathode electrolyte outlet through liquid outlet pipelines.
Preferably, the liquid inlet pipeline comprises a main liquid inlet pipeline, a first liquid inlet pipeline and a second liquid inlet pipeline;
one end of the main liquid inlet pipeline is connected with an electrolyte outlet of the electrolyte storage device, and the other end of the main liquid inlet pipeline is respectively connected with one end of the first liquid inlet pipeline and one end of the second liquid inlet pipeline;
the other end of the first liquid inlet pipeline is connected with the anode electrolyte inlet, and the other end of the second liquid inlet pipeline is connected with the cathode electrolyte inlet.
Preferably, the liquid outlet pipeline comprises a main liquid outlet pipeline, a first liquid outlet pipeline and a second liquid outlet pipeline;
one end of the main liquid outlet pipeline is connected with an electrolyte inlet of the electrolyte storage device, and the other end of the main liquid outlet pipeline is respectively connected with one end of the first liquid outlet pipeline and one end of the second liquid outlet pipeline;
the other end of the first liquid outlet pipeline is connected with the anode electrolyte outlet, and the other end of the second liquid outlet pipeline is connected with the cathode electrolyte outlet.
Preferably, a liquid flow power device is arranged on the liquid inlet pipeline.
Preferably, a liquid flow power device is arranged on the total liquid inlet pipeline.
Preferably, the positive half cell comprises a positive electrode frame and a positive electrode arranged in the positive electrode frame, and the negative half cell comprises a negative electrode frame and a negative electrode arranged in the negative electrode frame;
the anode electrode frame is provided with an anode electrolyte inlet, an anode electrolyte outlet and an anode electrolyte channel, and the cathode electrode frame is provided with a cathode electrolyte inlet, a cathode electrolyte outlet and a cathode electrolyte channel.
Preferably, the positive electrode takes a carbon felt as a substrate, and a positive active substance is coated on the substrate and is nickel hydroxide;
the negative electrode is a carbon felt.
Preferably, the coating amount of the positive electrode active material on the substrate is 0.5g/cm2～1g/cm2。
Preferably, the thickness of the negative electrode frame is smaller than that of the negative electrode, and the thickness of the positive electrode frame is smaller than that of the positive electrode.
Preferably, the electrolyte is an alkaline aqueous solution containing a soluble zinc salt, and the base used is Ba (OH)2One or more of NaOH, KOH and LiOH, wherein the concentration of zinc ions in the soluble zinc salt is 0.4-0.5 mol/L, and the concentration of the alkaline aqueous solution is 4-7.5 mol/L.
The invention has the beneficial effects that:
1. according to the invention, the separator is arranged between the positive half cell and the negative half cell, and the battery system with the positive electrolyte and the negative electrolyte separated is constructed, so that the battery units can be connected in series in multiple sections, and the output voltage, the energy density and the power density of the battery are improved. And the positive electrolyte and the negative electrolyte in the battery unit are not mixed, so that the electric leakage and short circuit conditions are avoided, and the circulation stability of the battery is ensured.
2. According to the invention, the positive half cell and the negative half cell are respectively communicated with the electrolyte storage device, so that the electrolyte flows in the positive half cell and the negative half cell and independently circulates respectively, the polarization of the cell is reduced, and the energy density of the cell is improved; and only one flow power device load and one electrolyte storage device are needed to store the electrolyte, so that the battery structure is simplified.
3. According to the invention, the carbon felt is used as the cathode, so that the cathode still has a simple substance of zinc under the condition that only a small amount of electrolyte is left in the cathode half-cell, the occurrence of a hydrogen evolution side reaction when the cell is started every time is avoided, the service life of the cell is prolonged, and the safety of the cell is improved.
4. The positive electrode reaction of the zinc-nickel single flow battery is solid-solid phase conversion, the positive electrode active substance is fixed in the positive electrode cavity and does not flow along with the electrolyte, and the positive electrode active substance is not contacted with the negative electrode active substance all the time, so that the attenuation of the battery capacity caused by the redox reaction between the positive electrode active substance and the negative electrode active substance is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a zinc-nickel single flow battery of the present invention;
FIG. 2 shows that the conventional zinc-nickel single flow battery is at 40mA/cm2A lower run battery performance curve;
FIG. 3 shows the zinc-nickel single flow cell assembled in example 1 at 40mA/cm2The lower run cell performance curve.
In the figure, 1, a pile support body, 2, a current collector, 3, a positive electrode half cell, 4, a negative electrode half cell, 5, a separator, 6, a liquid flow power device, 7, an electrolyte storage device, 8, a liquid separation structure, 9 and a liquid flow collection structure.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
The zinc-nickel single flow battery has the structure shown in fig. 1 and comprises a galvanic pile and an electrolyte storage device 7.
Wherein a battery unit is arranged in the electric pile; the two opposite sides of the battery unit are respectively provided with a pile support body 1, and a current collector 2 is arranged between the pile support body 1 and the battery unit. The current collector 2, by being in direct contact with the battery cell electrodes, introduces current into the battery cell during battery charging and draws current out of the battery cell during discharging. The current collector 2 can be copper plate, graphite, etc.
The battery unit comprises a positive half-cell 3 and a negative half-cell 4, a separator 5 is arranged between the positive half-cell 2 and the negative half-cell 3; the separator 5 separates the positive half cell 3 and the negative half cell 4 into two independent chambers, allows ions to pass through, prevents electrolytes in the two chambers from mixing with each other, enables the positive electrolyte and the negative electrolyte to flow, and circulates independently, constructs a battery system with separated positive electrolyte and negative electrolyte, enables a plurality of single cell units to be connected in series in a cell stack, and improves the output voltage, the energy density and the power density of the battery of the single cell stack. Meanwhile, unsafe factors such as battery leakage, short circuit and the like caused by mutual mixing of the positive electrolyte and the negative electrolyte in the battery are avoided. In particular, the separator 5 may be an ion-conducting membrane.
The anode half cell 2 is provided with an anode electrolyte inlet and an anode electrolyte outlet, and the cathode half cell 3 is provided with a cathode electrolyte inlet and a cathode electrolyte outlet;
the positive half cell comprises a positive electrode frame and a positive electrode arranged in the positive electrode frame, and the negative half cell comprises a negative electrode frame and a negative electrode arranged in the negative electrode frame;
the anode electrode frame is provided with an anode electrolyte inlet, an anode electrolyte outlet and an anode electrolyte channel, and the cathode electrode frame is provided with a cathode electrolyte inlet, a cathode electrolyte outlet and a cathode electrolyte channel.
The positive electrode takes carbon felt as a substrate, a positive active substance is coated on the substrate, the positive active substance is nickel hydroxide, and the coating amount of the positive active substance on the substrate is 0.5g/cm2～1g/cm2。
The negative electrode is a carbon felt. Specifically, the negative electrode is made of a deposition type carbon felt. When the battery stops running, a small amount of electrolyte can be reserved in the carbon felt cathode, so that the dissolving amount of the zinc simple substance deposited on the cathode is reduced, when the battery is started again, the zinc simple substance is still reserved on the cathode, the hydrogen evolution side reaction is avoided when the battery is started, the service life of the battery is prolonged, and the safety of the battery is improved.
The thickness of the negative electrode frame is smaller than that of the negative electrode, and the thickness of the positive electrode frame is smaller than that of the positive electrode. Specifically, the thickness relationship among the negative electrode frame, the negative electrode, the positive electrode frame and the positive electrode is as follows: the thickness of the negative electrode frame is 2.5-4 mm, and the thickness of the negative electrode is 4-5 mm; the thickness of the positive electrode frame is 6-9 mm, and the thickness of the positive electrode is 8-10 mm.
Wherein the electrolyte outlet of electrolyte storage device 7 is connected with positive electrolyte inlet and negative electrode electrolyte inlet respectively through the feed liquor pipeline, and the electrolyte inlet of electrolyte storage device 7 is connected with positive electrolyte outlet and negative electrode electrolyte outlet respectively through the drain pipe way.
The liquid inlet pipeline comprises a main liquid inlet pipeline, a first liquid inlet pipeline and a second liquid inlet pipeline;
one end of the total liquid inlet pipeline is connected with an electrolyte outlet of the electrolyte storage device 7, and the other end of the total liquid inlet pipeline is respectively connected with one end of the first liquid inlet pipeline and one end of the second liquid inlet pipeline;
the other end of the first liquid inlet pipeline is connected with the anode electrolyte inlet, and the other end of the second liquid inlet pipeline is connected with the cathode electrolyte inlet.
Specifically, the liquid separating structure 8 may be installed on the total liquid inlet pipeline, and the total liquid inlet pipeline is separated into a first liquid inlet pipeline and a second liquid inlet pipeline by the liquid separating structure 8. In the embodiment of the invention, the liquid separating structure 8 can adopt a three-way pipe, and three ports of the three-way pipe are respectively connected with the main liquid inlet pipeline, the first liquid inlet pipeline and the second liquid inlet pipeline.
Wherein, a liquid flow power device 6 is arranged on the liquid inlet pipeline and is used for providing power for the electrolyte entering the anode half cell 2 and the cathode half cell 3. In the embodiment of the invention, the liquid flow power device 6 is arranged on the total liquid inlet pipeline, so that the liquid supply to the positive half cell and the negative half cell can be realized simultaneously by only adopting one liquid flow power device. The fluid power device 6 can be a pump.
The liquid outlet pipeline comprises a main liquid outlet pipeline, a first liquid outlet pipeline and a second liquid outlet pipeline;
one end of the main liquid outlet pipeline is connected with an electrolyte inlet of the electrolyte storage device 7, and the other end of the main liquid outlet pipeline is respectively connected with one end of the first liquid outlet pipeline and one end of the second liquid outlet pipeline;
the other end of the first liquid outlet pipeline is connected with the anode electrolyte outlet, and the other end of the second liquid outlet pipeline is connected with the cathode electrolyte outlet.
Specifically, a liquid flow collecting structure 9 may be installed on the main liquid outlet pipe, and the electrolytes in the first liquid outlet pipe and the second liquid outlet pipe are collected into the main liquid outlet pipe by the liquid flow collecting structure 9 and then flow into the electrolyte storage device 7. In the embodiment of the present invention, the liquid flow collecting structure 9 may adopt a three-way pipe, and three ports of the three-way pipe are respectively connected with the main liquid outlet pipeline, the first liquid outlet pipeline and the second liquid outlet pipeline.
In the embodiment of the invention, the electrolyte is shunted on the total liquid inlet pipeline, so that the electrolyte respectively enters the positive half cell 3 and the negative half cell 4, and meanwhile, the electrolyte is collected in the total liquid outlet pipeline after flowing out of the positive half cell 3 and the negative half cell 4 and returns to the electrolyte storage device 7, so that the circulation of the electrolyte in the positive half cell 3 and the negative half cell 4 can be respectively realized by adopting one electrolyte storage device 7 and one liquid flow power device 6, and the cell structure is simplified. More importantly, the positive electrolyte always keeps flowing, the change of the concentration of the hydroxyl ions in the electrolyte is small (the amount of the hydroxyl ions in the positive electrolyte is large enough, and the volume of the electrolyte is large enough), so that the concentration polarization of the positive electrode is reduced. Meanwhile, the electrolyte flowing in the anode can always keep the anode cavity filled with the electrolyte, so that the internal resistance of the anode is reduced, the polarization of the battery is reduced, and the energy density of the battery is improved.
In the embodiment of the invention, the battery unit is formed by connecting one battery unit or more than two battery units in series, and the battery units are connected in series through the bipolar plate.
Wherein the electrolyte contains soluble zinc saltThe alkaline aqueous solution of (1), wherein the alkali used is Ba (OH)2One or more of NaOH, KOH and LiOH, wherein the concentration of zinc ions in the soluble zinc salt is 0.4-0.5 mol/L, and the concentration of the alkaline aqueous solution is 4-7.5 mol/L.
The battery performance of the zinc-nickel single flow battery in the prior art is compared with that of the zinc-nickel single flow battery with the structure of the invention.
Assembling the zinc-nickel single flow battery with the structure of the invention:
the battery comprises a galvanic pile formed by connecting 10 battery units in series, an electrolyte storage tank and a pump; the battery unit comprises a positive half battery and a negative half battery, wherein the positive half battery comprises a positive electrode frame and a positive electrode arranged in the positive electrode frame, and the negative half battery comprises a negative electrode frame and a negative electrode arranged in the negative electrode frame; a separator is arranged between the positive electrode half cell and the negative electrode half cell; the electrolyte in the electrolyte storage tank flows into the anode half cell and the cathode half cell through a pump and a three-way pipeline respectively, wherein the anode takes a carbon felt as a substrate, the substrate is coated with nickel hydroxide, and the coating amount of the nickel hydroxide is 0.8g/cm2(ii) a The negative electrode is a deposition type carbon felt electrode, and the electrolyte of the positive electrode and the electrolyte of the negative electrode are alkaline aqueous solutions containing soluble zinc salt. The negative electrode is sealed in an electrode frame made of PVC materials, the thickness of the electrode frame is 3mm, and the thickness of the negative electrode is 5 mm. The positive electrode is sealed in an electrode frame made of PVC materials, the thickness of the electrode frame is 8mm, and the thickness of the negative electrode is 9 mm. The effective areas of the positive electrode and the negative electrode are both 6 x 6 cm; the positive current collector is made of graphite, the alkali in the electrolyte is KOH, the concentration of zinc ions in the soluble zinc salt is 0.4mol/L, and the concentration of an alkaline aqueous solution is 5 mol/L. The battery separator is a porous ion-conducting membrane.
Assembling a zinc-nickel single flow battery of the prior art
The battery comprises a galvanic pile formed by connecting 10 battery units in series, an electrolyte storage tank and a pump; the battery unit comprises a positive half battery and a negative half battery, wherein the positive half battery comprises a positive electrode frame and a positive electrode arranged in the positive electrode frame, and the negative half battery comprises a negative electrode frame and a negative electrode arranged in the negative electrode frame; a separator is arranged between the positive electrode half cell and the negative electrode half cell; the negative electrolyte in the negative electrolyte storage tank flows into the negative electrode through the pumpAnd circulating back to the negative electrolyte storage tank, sealing the positive electrolyte in the positive half cell, wherein the positive electrode uses carbon felt as a substrate coated with nickel hydroxide with the coating amount of 0.8g/cm2(ii) a The negative electrode is a deposition type carbon felt electrode, and the electrolyte of the positive electrode and the electrolyte of the negative electrode are alkaline aqueous solutions containing soluble zinc salt. The negative electrode is sealed in an electrode frame made of PVC materials, the thickness of the electrode frame is 3mm, and the thickness of the negative electrode is 5 mm. The positive electrode is sealed in an electrode frame made of PVC materials, the thickness of the electrode frame is 8mm, and the thickness of the negative electrode is 9 mm. The effective areas of the positive electrode and the negative electrode are both 6cm multiplied by 6 cm; the positive current collector is made of graphite, the alkali in the electrolyte is KOH, the concentration of zinc ions in the soluble zinc salt is 0.4mol/L, and the concentration of an alkaline aqueous solution is 5 mol/L. The battery separator is a porous ion-conducting membrane.
At a current density of 40mA/cm2Under the conditions of (1), the battery performances of the zinc-nickel single flow battery in the prior art and the zinc-nickel single flow battery provided by the invention are tested and obtained as shown in the following table:
it can be seen from the table that compared with the zinc-nickel single flow battery in the prior art, the zinc-nickel single flow battery provided by the invention has obviously improved battery energy efficiency, although coulombic efficiency is slightly lower than that of the zinc-nickel single flow battery in the prior art, because a current loop is generated when the electrolyte is collected and flows through the three-way pipe, the current is very small, the self-discharge of the battery can be ignored, and the improvement of the battery performance is not influenced.
At a current density of 40mA/cm2Under the conditions of (1), the operation performance indexes of the zinc-nickel single flow battery in the prior art and the zinc-nickel single flow battery provided by the invention are respectively shown in fig. 2 and 3. The comparison shows that the energy efficiency of the zinc-nickel single flow battery in the prior art is about 83%, while the zinc-nickel single flow battery provided by the invention can reach 85.6% and the battery performance is obviously improved. Therefore, compared with the prior art, the invention improves the battery structure to enable the anode electrolyte to circularly flowThe polarization of the battery is reduced, and the energy efficiency of the battery is obviously improved. Because the anode reaction is solid-solid phase conversion, the anode active substance is always fixed in the anode cavity and cannot enter the electrolyte storage tank along with the flowing of the electrolyte, the anode active substance is ensured not to be contacted with the cathode active substance, the redox reaction between the anode active substance and the cathode active substance is avoided, and therefore, the capacity of the battery is not attenuated. Meanwhile, from the view point of the cycle stability of the battery, the coulomb efficiency of the battery provided by the invention is not attenuated, which also proves that the battery provided by the invention does not generate hydrogen evolution side reaction after undergoing the initial activation.
Although the present application has been described with reference to a few embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims.
Claims (10)
1. A zinc-nickel single flow battery is characterized by comprising a galvanic pile and an electrolyte storage device;
a battery unit is arranged in the electric pile;
the battery unit comprises a positive electrode half battery and a negative electrode half battery, and a separator is arranged between the positive electrode half battery and the negative electrode half battery;
the anode half cell is provided with an anode electrolyte inlet and an anode electrolyte outlet, and the cathode half cell is provided with a cathode electrolyte inlet and a cathode electrolyte outlet;
electrolyte storage device's electrolyte export through the feed liquor pipeline respectively with positive pole electrolyte import with negative pole electrolyte access connection, electrolyte storage device's electrolyte import through the drain pipe way respectively with positive pole electrolyte export with negative pole electrolyte exit connection.
2. A zinc-nickel single flow battery as claimed in claim 1,
the liquid inlet pipeline comprises a main liquid inlet pipeline, a first liquid inlet pipeline and a second liquid inlet pipeline;
one end of the total liquid inlet pipeline is connected with an electrolyte outlet of the electrolyte storage device, and the other end of the total liquid inlet pipeline is respectively connected with one end of the first liquid inlet pipeline and one end of the second liquid inlet pipeline;
the other end of the first liquid inlet pipeline is connected with the anode electrolyte inlet, and the other end of the second liquid inlet pipeline is connected with the cathode electrolyte inlet.
3. A zinc-nickel single flow battery as claimed in claim 1,
the liquid outlet pipeline comprises a main liquid outlet pipeline, a first liquid outlet pipeline and a second liquid outlet pipeline;
one end of the main liquid outlet pipeline is connected with an electrolyte inlet of the electrolyte storage device, and the other end of the main liquid outlet pipeline is respectively connected with one end of the first liquid outlet pipeline and one end of the second liquid outlet pipeline;
the other end of the first liquid outlet pipeline is connected with the anode electrolyte outlet, and the other end of the second liquid outlet pipeline is connected with the cathode electrolyte outlet.
4. The zinc-nickel single flow battery according to claim 1, wherein a flow power device is disposed on the liquid inlet pipeline.
5. The zinc-nickel single flow battery of claim 2, wherein a flow power device is disposed on the total liquid inlet pipeline.
6. A zinc-nickel single flow battery as claimed in any one of claims 1 to 5,
the anode half cell comprises an anode electrode frame and an anode arranged in the anode electrode frame, and the cathode half cell comprises a cathode electrode frame and a cathode arranged in the cathode electrode frame;
the cathode comprises a cathode frame, a cathode frame and a positive electrode frame, wherein the positive electrode frame is provided with a positive electrolyte inlet, a positive electrolyte outlet and a positive electrolyte channel, and the negative electrode frame is provided with a negative electrolyte inlet, a negative electrolyte outlet and a negative electrolyte channel.
7. A zinc-nickel single flow battery as claimed in claim 6,
the positive electrode takes a carbon felt as a matrix, a positive active substance is coated on the matrix, and the positive active substance is nickel hydroxide;
the negative electrode is a carbon felt.
8. The zinc-nickel single flow battery according to claim 7, wherein the coating amount of the positive electrode active material on the substrate is 0.5g/cm2～1g/cm2。
9. The zinc-nickel single flow battery according to claim 6, wherein the negative electrode frame thickness is less than the negative electrode thickness, and the positive electrode frame thickness is less than the positive electrode thickness.
10. The zinc-nickel single flow battery of claim 1, wherein the electrolyte is an alkaline aqueous solution containing a soluble zinc salt, and the base used is Ba (OH)2One or more of NaOH, KOH and LiOH, wherein the concentration of zinc ions in the soluble zinc salt is 0.4-0.5 mol/L, and the concentration of the alkaline aqueous solution is 4-7.5 mol/L.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107845826A (en) * | 2016-09-21 | 2018-03-27 | 中国科学院大连化学物理研究所 | A kind of zinc bromine single flow battery |
| CN207587857U (en) * | 2017-11-08 | 2018-07-06 | 中国科学院大连化学物理研究所 | A kind of zinc-nickel single flow battery |
| CN109755604A (en) * | 2017-11-08 | 2019-05-14 | 中国科学院大连化学物理研究所 | A kind of neutrality zinc iodine solution galvanic battery |
| CN109786799A (en) * | 2017-11-10 | 2019-05-21 | 中国科学院大连化学物理研究所 | A kind of Zn-Ni liquid battery |
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2019
- 2019-12-13 CN CN201911282465.XA patent/CN112993359A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107845826A (en) * | 2016-09-21 | 2018-03-27 | 中国科学院大连化学物理研究所 | A kind of zinc bromine single flow battery |
| CN207587857U (en) * | 2017-11-08 | 2018-07-06 | 中国科学院大连化学物理研究所 | A kind of zinc-nickel single flow battery |
| CN109755604A (en) * | 2017-11-08 | 2019-05-14 | 中国科学院大连化学物理研究所 | A kind of neutrality zinc iodine solution galvanic battery |
| CN109786799A (en) * | 2017-11-10 | 2019-05-21 | 中国科学院大连化学物理研究所 | A kind of Zn-Ni liquid battery |
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