CN109755621A - A kind of zinc-nickel single flow battery - Google Patents
A kind of zinc-nickel single flow battery Download PDFInfo
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- CN109755621A CN109755621A CN201711091890.1A CN201711091890A CN109755621A CN 109755621 A CN109755621 A CN 109755621A CN 201711091890 A CN201711091890 A CN 201711091890A CN 109755621 A CN109755621 A CN 109755621A
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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
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Abstract
The present invention relates to a kind of zinc-nickel single flow battery, which includes pile made of a section monocell or the above cells in series of two sections, cathode electrolyte storage tank, cathode circulation line, pump；Monocell includes the positive end plate successively overlapped from top to bottom, plus plate current-collecting body, the anode being placed in anode electrode frame, battery diaphragm, the cathode being placed in negative electrode frame, negative current collector, negative end plate, electrolyte liquid in cathode electrolyte storage tank flows through cathode through pump, and anode electrolyte is not flowed and is sealed in the airtight chamber that plus plate current-collecting body, anode electrode frame, anode, battery diaphragm are surrounded by；Wherein positive and negative electrode is flexible electrode, and positive and negative electrolyte is identical, is the alkaline aqueous solution containing soluble zinc salt.The battery has many advantages, such as that structure is simple, energy density is high, power density is high, safety is good.
Description
Technical field
The present invention relates to flow battery energy storage technical field, in particular to a kind of Zn-Ni liquid battery field.
Technical background
Zinc-nickel single flow battery is a kind of novel low cost, high efficiency, environmentally friendly flow battery energy storage technology,
Have many advantages, such as that energy density and current efficiency are high, the simple steerable, long service life of device, low in cost, is mainly used in
The fields such as the renewable energy power generations such as peak load regulation network, wind energy and solar energy, electric car.
Just extremely sintered type nickel oxide electrode, cathode are the deposition zinc electrode on nickel foil, electricity to traditional zinc-nickel single flow battery
Solution liquid is 1.0M ZnO+0.5M LiOH+10M KOH aqueous solution, and does not have diaphragm between positive and negative anodes.Since the battery is without diaphragm,
Cause the battery to cannot achieve multi-section serial, it is same, without physical barrier and conducting flowing electrolyte in, each batteries it
Between can only connect in parallel；Because of traditional zinc-nickel single flow battery positive electrode poorly conductive, electric current can not be from electricity
Thickness direction conducting in pole causes it the dual-battery structures such as full vanadium, zinc bromine cannot be used to run, so that battery cannot achieve more piece string
Connection.Traditional zinc-nickel single flow battery is due to being limited to negative electrode material (overpotential of hydrogen evolution low and metal) of insoluble in alkali, cathode hair
The probability of raw side reaction greatly increases and (hydrogen is precipitated), and for battery when long-time is stood, the zinc simple substance that cathode generates can be molten again
Solution is into electrolyte, and when so that battery being then turned on, due to not having overpotential of hydrogen evolution higher zinc metal liberation of hydrogen pair occurs for cathode
Reaction, the generation of hydrogen increases the risk of battery when use.It is limited to battery overall structure, traditional zinc-nickel single flow battery
Positive electrode capacity is too low, causes battery capacity limited.
Summary of the invention
The present invention is in order to solve the above technical problems, the present invention is constructed positive and negative by adding amberplex between positive and negative anodes
Electrolyte separated system in pole allows battery to carry out multi-section serial on the basis of single-unit, positive and negative anodes electrolyte between every section
It is immiscible, prevent electric leakage and short-circuit conditions from occurring.Anode integrally closed, positive electrolyte inside are not flowed, are simplified
Battery structure.Meanwhile it being made into battery cathode by using carbon felt is enclosed in the structure in confined space, prevent battery every
The liberation of hydrogen side reaction occurred when secondary unlatching, also improves the safety of battery while improving battery life.Battery plus-negative plate
Using same electrolyte, electrolyte arbitrarily can mutually be mixed without influencing battery performance by amberplex.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of zinc-nickel single flow battery, the battery include electricity made of a section monocell or the above cells in series of two sections
Heap, cathode electrolyte storage tank, cathode circulation line, pump；Monocell includes the positive end plate successively overlapped from top to bottom, anode collection
Fluid, the anode being placed in anode electrode frame, battery diaphragm, the cathode being placed in negative electrode frame, negative current collector, negative pole end
Plate, the electrolyte liquid in cathode electrolyte storage tank flow through cathode through pump, and anode electrolyte does not flow and is sealed in positive collection
In the airtight chamber that fluid, the anode being placed in anode electrode frame, battery diaphragm are surrounded by；Wherein anode be using carbon felt as
Positive active material is coated on matrix, matrix, positive active material group becomes nickel hydroxide；Cathode is flexible electrode, positive and negative
Electrolyte is identical, is the alkaline aqueous solution containing soluble zinc salt.
Negative flexible electrode is carbon felt.
Coating amount of the positive active material on anode is 0.5g/cm2~1g/cm2。
Cathode is closed in electrode frame, electrode frame thickness 2.5-4mm, cathode thickness 4-5mm；Anode is closed in electrode
In frame, electrode frame thickness 6-9mm, positive thickness 8-10mm.
Alkali is Ba (OH) in positive and negative anodes electrolyte2, one or more of NaOH, KOH, LiOH, soluble zinc salt
Middle zinc ion concentration is 0.4mol/L~0.5mol/L, and alkaline aqueous solution concentration is 4mol/L~7.5mol/L.
Battery diaphragm is ion-conductive membranes.Amberplex or porous conductive membranes are used in battery, pass through inside battery
The flowing of ion and the directed movement of external circuit electronics constitute current loop.
Beneficial effects of the present invention:
The present invention can not carry out cells in series inside single pile, pass through for the problem that traditional zinc-nickel single flow battery
Add amberplex between positive and negative anodes, constructs the battery system of positive and negative anodes electrolyte separation, allow battery in single-unit base
Multi-section serial is carried out on plinth, is improved the output voltage of single pile, is improved battery energy density and power density.Between every section just
Electrolyte liquid is immiscible, and electric leakage and short-circuit conditions is prevented to occur.
Anode is by integrally closed, and electrolyte does not flow, and reduces a circulation pump load and a fluid reservoir, simplifies
Battery structure improves battery energy density.
Cathode is that flexible electrode substitutes traditional nickel foam, and flexible negative electrode material is enclosed in the confined space of electrode frame
Structure is made into battery cathode, and when battery is out of service, only a small amount of electrolyte residual inside cathode, to greatly reduce so heavy
For product in the meltage of the zinc simple substance of cathode, when guaranteeing that battery is again turned on, cathode still has zinc simple substance, and battery is prevented to open every time
The liberation of hydrogen side reaction of Shi Fasheng, also improves the safety of battery while improving battery life.
Positive and negative anodes use same electrolyte, and solve that traditional double flow battery positive and negative anodes electrolyte cannot mix mutually asks
Topic.Can make battery not by positive and negative anodes electrolyte mutually mix and bring is influenced, guarantee the cyclical stability of battery.
Since anode is made using the method for coating nickel hydroxide in carbon felt substrate, active matter quality can be free
It controls, so that anode capacity is greatly improved compared to traditional zinc-nickel single flow battery anode, battery capacity is caused substantially to mention
It is high.
Zinc-nickel single flow battery in the present invention, positive electrolyte inside do not flow.In cell operation, positive and negative anodes
Zinc ion concentration changes in electrolyte, causes positive and negative anodes electrolyte that can carry out a small amount of migration by diaphragm, so that
Originally minor change occurs for immobilising anolyte liquid hold-up.If the longitudinal vertical placement of battery, positive electrolyte inside cannot be protected
The card moment is filled, and causes electrode top active material to separate with electrolyte, influences the uniformity of electrode reaction, lead to battery
Polarization becomes larger.If battery levels place (anode is under), under the effect of gravity, positive electrolyte inside can remain full of shape at the moment
State, and be evenly distributed, battery polarization is reduced, battery performance is improved.
Detailed description of the invention
Fig. 1 is traditional zinc-nickel single flow battery structural schematic diagram；
Fig. 2 is traditional zinc-nickel single flow battery in 40mA/cm2Lower operation battery performance；
Fig. 3 is zinc-nickel single flow battery structural schematic diagram of the invention, wherein 1 positive and negative anodes end plate；2, positive and negative electrode pole afflux
Body；3, the positive and negative electrode of positive and negative electrode electrode frame and inside；4, ion-conductive membranes；5, electrolyte liquid fluid reservoir；6, it pumps
Fig. 4 is the zinc-nickel single flow battery of example 1 group dress in 40mA/cm2Lower operation battery performance.
Specific embodiment
Embodiment
Zinc-nickel single flow battery pile as made of the above cells in series of 2 sections, cathode electrolyte storage tank, cathode circulation pipe
Road, pump；Monocell include the positive end plate successively overlapped from top to bottom, plus plate current-collecting body, the anode being placed in anode electrode frame,
Battery diaphragm, the cathode being placed in negative electrode frame, negative current collector, negative end plate, the negative electricity in cathode electrolyte storage tank
Solution liquid flows through cathode through pump, anode electrolyte do not flow and be sealed in plus plate current-collecting body, anode electrode frame, anode, battery every
In the airtight chamber that film is surrounded by；Wherein anode be using carbon felt as matrix, matrix on coated with nickel hydroxide；Cathode is heavy
Product type carbon felt electrode, positive and negative electrolyte is the alkaline aqueous solution containing soluble zinc salt.Painting of the positive active material on anode
The amount of applying is 0.8g/cm2, cathode is closed in the electrode frame as made by PVC material, electrode frame thickness 3mm.Anode is closed
In the electrode frame as made by PVC material, electrode frame thickness 8mm.Positive and negative anodes effective area 6*6cm；Plus plate current-collecting body material
For graphite, alkali is KOH in positive and negative anodes electrolyte, and zinc ion concentration is 0.4mol/L, alkaline aqueous solution concentration in soluble zinc salt
For 5mol/L.
Battery diaphragm is porous ion conductive membranes.
Battery structure is shown in Fig. 1, battery 40mA/cm2Running performance index is shown in Fig. 2.
As shown in Fig. 2, being zinc-nickel single flow battery in 40mA/cm in current density2Under conditions of, compare traditional zinc-nickel list
Flow battery performance (energy efficiency 78% or so), the battery performance (energy efficiency 83%) of zinc-nickel single flow battery of the invention
It is significantly improved.In the present invention, positive and negative anodes and between using install additional battery diaphragm method, greatly shortened compared to traditional structure
Interpolar is away from causing the energy efficiency to increase.From the point of view of Fig. 4, the cyclical stability of battery, zinc-nickel single flow battery library of the invention
Human relations efficiency does not decay, this also demonstrates battery after living through the activation at initial stage, and there is no liberation of hydrogen side reaction generations.
Claims (6)
1. a kind of zinc-nickel single flow battery, which is characterized in that the battery includes a section monocell or the above cells in series of two sections
Made of pile, cathode electrolyte storage tank, cathode circulation line, pump；Monocell includes the positive terminal successively overlapped from top to bottom
Plate, plus plate current-collecting body, the anode being placed in anode electrode frame, battery diaphragm, the cathode being placed in negative electrode frame, negative pole currect collecting
Body, negative end plate, wherein electrolyte liquid in cathode electrolyte storage tank flows through cathode through pump, anode electrolyte do not flow and
It is sealed in the airtight chamber that plus plate current-collecting body, the anode being placed in anode electrode frame, battery diaphragm are surrounded by；Wherein
Positive and negative electrode is flexible electrode, and positive and negative electrolyte is identical, is the alkaline aqueous solution containing soluble zinc salt.
2. zinc-nickel single flow battery according to claim 1, which is characterized in that wherein anode be using carbon felt as matrix,
Positive active material is coated on matrix, positive active material group becomes nickel hydroxide；One side coated with active material is close
Battery diaphragm, negative flexible electrode are carbon felt.
3. zinc-nickel single flow battery according to claim 1 or 2, it is characterised in that: positive active material is on anode
Coating amount is 0.5g/cm2~1g/cm2。
4. Zn-Ni liquid battery according to claim 1, it is characterised in that: cathode is closed in electrode frame, electrode frame
Thickness 2.5-4mm, cathode thickness 4-5mm；Anode is closed in electrode frame, electrode frame thickness 6-9mm, positive thickness 8-
10mm。
5. Zn-Ni liquid battery according to claim 1, which is characterized in that alkali is Ba (OH) in positive and negative anodes electrolyte2、
One or more of NaOH, KOH, LiOH, zinc ion concentration is 0.4mol/L~0.5mol/L, alkali in soluble zinc salt
Property concentration of aqueous solution be 4mol/L~7.5mol/L.
6. Zn-Ni liquid battery according to claim 1, which is characterized in that battery diaphragm is ion-conductive membranes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711091890.1A CN109755621A (en) | 2017-11-08 | 2017-11-08 | A kind of zinc-nickel single flow battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711091890.1A CN109755621A (en) | 2017-11-08 | 2017-11-08 | A kind of zinc-nickel single flow battery |
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| CN109755621A true CN109755621A (en) | 2019-05-14 |
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| CN201711091890.1A Pending CN109755621A (en) | 2017-11-08 | 2017-11-08 | A kind of zinc-nickel single flow battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599828A (en) * | 2020-12-15 | 2021-04-02 | 大连海事大学 | Novel titanium-manganese single flow battery |
| CN112928298A (en) * | 2019-12-06 | 2021-06-08 | 中国科学院大连化学物理研究所 | Zinc-bromine single flow battery structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201845830U (en) * | 2010-11-11 | 2011-05-25 | 中国人民解放军63971部队 | Flow battery galvanic pile |
| CN103137986A (en) * | 2011-12-05 | 2013-06-05 | 张华民 | Zinc bromine single flow cell |
| KR20140052478A (en) * | 2012-10-24 | 2014-05-07 | 주식회사 비츠로셀 | Ni-zn flow battery with long life time |
| CN103840187A (en) * | 2012-11-23 | 2014-06-04 | 中国科学院大连化学物理研究所 | Semi-solid-state zinc nickel flow cell |
-
2017
- 2017-11-08 CN CN201711091890.1A patent/CN109755621A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201845830U (en) * | 2010-11-11 | 2011-05-25 | 中国人民解放军63971部队 | Flow battery galvanic pile |
| CN103137986A (en) * | 2011-12-05 | 2013-06-05 | 张华民 | Zinc bromine single flow cell |
| KR20140052478A (en) * | 2012-10-24 | 2014-05-07 | 주식회사 비츠로셀 | Ni-zn flow battery with long life time |
| CN103840187A (en) * | 2012-11-23 | 2014-06-04 | 中国科学院大连化学物理研究所 | Semi-solid-state zinc nickel flow cell |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928298A (en) * | 2019-12-06 | 2021-06-08 | 中国科学院大连化学物理研究所 | Zinc-bromine single flow battery structure |
| CN112928298B (en) * | 2019-12-06 | 2022-05-17 | 中国科学院大连化学物理研究所 | Zinc-bromine single flow battery structure |
| CN112599828A (en) * | 2020-12-15 | 2021-04-02 | 大连海事大学 | Novel titanium-manganese single flow battery |
| CN112599828B (en) * | 2020-12-15 | 2022-05-31 | 大连海事大学 | Novel titanium-manganese single flow battery |
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