CN109979765A - Method based on sodium sulfite electrolyte building Asymmetric Supercapacitor - Google Patents
Method based on sodium sulfite electrolyte building Asymmetric Supercapacitor Download PDFInfo
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- CN109979765A CN109979765A CN201711458361.0A CN201711458361A CN109979765A CN 109979765 A CN109979765 A CN 109979765A CN 201711458361 A CN201711458361 A CN 201711458361A CN 109979765 A CN109979765 A CN 109979765A
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- electrolyte
- sodium sulfite
- asymmetric
- supercapacitor
- cation
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 59
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 title claims abstract description 56
- 235000010265 sodium sulphite Nutrition 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 17
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005341 cation exchange Methods 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims abstract description 12
- 239000007773 negative electrode material Substances 0.000 claims abstract description 5
- 238000005538 encapsulation Methods 0.000 claims abstract description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 4
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical group [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 24
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 11
- 235000011152 sodium sulphate Nutrition 0.000 claims description 11
- 239000002096 quantum dot Substances 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- -1 hydrogen Potassium oxide Chemical class 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 229910001950 potassium oxide Inorganic materials 0.000 claims description 2
- 229910001925 ruthenium oxide Inorganic materials 0.000 claims description 2
- WOCIAKWEIIZHES-UHFFFAOYSA-N ruthenium(iv) oxide Chemical compound O=[Ru]=O WOCIAKWEIIZHES-UHFFFAOYSA-N 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000010941 cobalt Substances 0.000 claims 1
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 1
- 229910002804 graphite Inorganic materials 0.000 claims 1
- 239000010439 graphite Substances 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 150000001450 anions Chemical class 0.000 abstract description 3
- 230000004888 barrier function Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 239000002985 plastic film Substances 0.000 description 8
- 229920006255 plastic film Polymers 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 239000000565 sealant Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 229910021389 graphene Inorganic materials 0.000 description 7
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 239000012286 potassium permanganate Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 2
- 238000002484 cyclic voltammetry Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- UKTDQTGMXUHPIF-UHFFFAOYSA-N [Na].S(O)(O)=O Chemical compound [Na].S(O)(O)=O UKTDQTGMXUHPIF-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002073 nanorod Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- PANBYUAFMMOFOV-UHFFFAOYSA-N sodium;sulfuric acid Chemical compound [Na].OS(O)(=O)=O PANBYUAFMMOFOV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/62—Liquid electrolytes characterised by the solute, e.g. salts, anions or cations therein
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
-
- 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
- Y02E60/13—Energy storage using capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The invention discloses a kind of methods based on sodium sulfite electrolyte building Asymmetric Supercapacitor.The method separates positive electrode with negative electrode material iron oxide with cation-exchange membrane, instills electrolyte in anode portion, instills sodium sulfite electrolyte in cathode, MnO is made in encapsulation2//Fe2O3The double electrolyte Asymmetric Supercapacitors of water system.The present invention successfully limits inferior sulfate radical and enters anode, so as to avoid the oxidation process of inferior sulfate radical using the function of the barrier anion transmission of cation-exchange membrane.The supercapacitor that the present invention constructs has the general character of asymmetric super supercapacitor, has high power density, overlength cycle life, and the operating potential window with 2.6V ultra-wide.
Description
Technical field
The present invention relates to the methods based on sodium sulfite electrolyte building Asymmetric Supercapacitor, belong to electrochemical energy storage
Technical field.
Background technique
Supercapacitor is the new and effective secondary power supply of one kind between battery and traditional capacitance, has the circulation longevity
Life length, power density height, safety, advantages of environment protection.Its power density ratio battery will be higher by 10 to 100 times, can release moment
Ultrahigh current is put, therefore is highly suitable for electric vehicle.Such as supercapacitor can be with the high energy electricity such as lithium secondary battery
Pond, which is used cooperatively, is used as electric vehicle, and super capacitor is used under the operating condition of the high-power output such as starting, climbing, acceleration
Device can greatly improve the performance of electric vehicle.In addition, supercapacitor is alternatively arranged as backup power source, independent current source
It is widely applied in fields such as communication, industry.Therefore, supercapacitor always is the hot spot of research.
Asymmetric super electric appliance is mainly made of electrode, electrolyte, diaphragm and encapsulation, and wherein electrolyte is that influence is super
One of key factor of capacitor.Currently based on MnO2//Fe2O3Asymmetric super electric appliance is frequently with sodium sulphate electrolyte, but mesh
Preceding report such as Adv.Funct.Mater.2016, the works such as 26,3711-3719, Nano Energy 2016,22,189-201
Make, potential window, capacitor and energy density are all extremely limited, mainly since conventional sulfuric acid sodium electrolyte cannot provide additionally
Fake capacitance and sodium sulphate caused by the reasons such as stability is not strong of high potential.
Since sodium sulfite electrolyte can be used as redox electrolytes liquid, it can be additionally provided fake capacitance, and sub-
Sodium sulphate electrolyte has the potential window of ultra-wide in minus zone, according to density energy formula E=1/2CV2, energy density (E)
It is related with its operating potential window (V) and its capacity (C).But current sodium sulfite electrolyte can be only applied to the super electricity of symmetric form
Container, voltage window V maximum can only arrive 1.2V, significantly limit the application of sodium sulfite.
Summary of the invention
It is an object of the invention to break through sodium sulfite to can be only applied to the status of symmetric form supercapacitor, by sulfurous acid
Sodium electrolyte is applied on Asymmetric Supercapacitor, overcomes symmetry supercapacitor current potential window narrows, energy density low
Disadvantage, the method for constructing the double electrolyte Asymmetric Supercapacitors of water system of 2.6V ultra-wide potential window, it has high simultaneously
Capacity, excellent cycle life, 2.6V ultra-wide operating potential window, high energy density and low cost and good safety
The features such as energy.
The technical solution of the present invention is as follows:
Based on the method for sodium sulfite electrolyte building Asymmetric Supercapacitor, sulfurous is obstructed using cation-exchange membrane
Sour sodium enters anode, prepares double electrolyte asymmetric type supercapacitors, the specific steps are as follows:
Positive electrode is separated with negative electrode material iron oxide with cation-exchange membrane, instills electrolyte in anode portion,
Cathode instills sodium sulfite electrolyte, and MnO is made in encapsulation2//Fe2O3The double electrolyte Asymmetric Supercapacitors of water system.
The positive electrode can be conventional use of any positive electrode, can be manganese oxide, ruthenium-oxide, cobalt oxide
Deng.
Preferably, the negative electrode material is the composite material or nanometer rods iron oxide of iron oxide quantum dot and graphene.
The electrolyte of the anode portion can be neutral, acid, alkaline electrolyte, specifically can be sodium sulphate, hydrogen
Potassium oxide, dilute sulfuric acid electrolyte.
Preferably, the concentration of the sodium sulfite electrolyte is 0.2M-2M.
Preferably, the cation-exchange membrane can be CMI7000.
Supercapacitor is by polarized electrolytic matter come energy storage, and by being powered on pole plate, positive plate attracts in electrolyte
Anion, negative plate attract cation, actually form two capacitive accumulation layers, the cation being separated is attached in negative plate
Closely, anion is near positive plate.
Compared with prior art, advantages of the present invention is as follows:
(1) sodium sulfite electrolyte can be additionally provided fake capacitance, and sodium sulfite as redox electrolytes liquid
Electrolyte has the potential window of ultra-wide in minus zone, to construct the supercapacitor of ultra high energy density.
(2) breaking through sodium sulfite can be only applied to the status for forming supercapacitor, and sodium sulfite electricity is successfully utilized
The advantages of solving liquid high capacity high potential window, the asymmetric type supercapacitor being assembled into can be worked normally in 2.6V, for height
The development of energy density supercapacitor is of great significance.
(3) present invention is using double electrolyte, the situation different suitable for all kinds of positive and negative anodes electrolyte, and can make in this way
Positive and negative pole material utilization rate reaches maximization, there is important promotion to make the development of double electrolyte Asymmetric Supercapacitors
With.
Detailed description of the invention
Fig. 1 is the cyclic voltammetry curve based on sodium sulfite Yu sodium sulphate electrolyte different potentials in embodiment 1.
Fig. 2 is in embodiment 1 based on sodium sulfite and sodium sulphate electrolyte 2.6V charging and discharging curve.
Fig. 3 is the circulation longevity based on iron oxide cathode Yu double electrolyte Asymmetric Supercapacitor devices of manganese oxide anode
Life figure.
Fig. 4 is that double electrolyte Asymmetric Supercapacitor device architectures based on iron oxide cathode and manganese oxide anode are illustrated
Figure.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples:
The cation-exchange membrane that embodiment uses commercially available can obtain, model CMI7000.
Embodiment 1
The preparation of first step manganese oxide: 0.15g potassium permanganate is dissolved in 40 water, then 100 DEG C of hydro-thermal 10h, success
Prepare the manganese oxide nanometer sheet grown on carbon cloth.
Step 2: the preparation of iron oxide quantum dot: by the functional graphene of the ferric nitrate of 0.5g and 0.05g in 30ml alcohol
Stirring is to dry in solution, and the compound of iron oxide quantum dot and graphene is then resolved at 200 DEG C.
Step 3: the assembling of the double electrolyte Asymmetric Supercapacitors of water system: using aluminum plastic film and sealant by sun from
Proton exchange is fixed up with cathode sealing, and sodium sulfite electrolyte is instilled cathode portion from reserved opening.It then again will oxidation
Manganese is fixed on cation-exchange membrane another side, and three sides are sealed with sealant and aluminum plastic film, instills sodium sulphate electrolyte, finally
Device is assembled by hot sealing.
By test, Fig. 1 is the cyclic voltammetry curve based on sodium sulfite Yu sodium sulphate electrolyte different potentials, can be seen
Out, this device can be operated normally in 2.6V.Fig. 2 device normal charging and discharging curve of 2.6V again thus, showing can be just in 2.6V
Often work.Fig. 3 is the cycle life figure of device, it can be seen that sweeps speed in height based on the Asymmetric Supercapacitor of sodium sulfite
Under, capacity remains to reach 105F/g, 2000 circle of circulation, and capacity retention ratio is up to 93.2%.Fig. 4 is the photomacrograph and knot of device
Structure schematic diagram.
Embodiment 2
The preparation of first step manganese oxide: 0.15g potassium permanganate is dissolved in 40 water, then 100 DEG C of hydro-thermal 10h, success
Prepare the manganese oxide nanometer sheet grown on carbon cloth.
Step 2: the preparation of nanometer rods iron oxide: the iron chloride of 0.54g and 0.284g sodium sulphate being dissolved in water, so
After be transferred in water heating kettle, be put into carbon cloth carry out 120 DEG C of 10h hydro-thermal, then under air anneal 400 DEG C of 1h, successfully prepare
Ferric oxide nano rod out.
Step 3: the assembling of the double electrolyte Asymmetric Supercapacitors of water system: using aluminum plastic film and sealant by sun from
Proton exchange is fixed up with cathode sealing, and sodium sulfite electrolyte is instilled cathode portion from reserved opening.It then again will oxidation
Manganese is fixed on cation-exchange membrane another side, and three sides are sealed with sealant and aluminum plastic film, instills sodium sulphate electrolyte, finally
Device is assembled by hot sealing.
By test, device can work in 2.6V normal operation, and since 3 material of electrode is flexible, Ke Yiying
For flexible electronic device.
Embodiment 3
The preparation of first step manganese oxide: 0.15g potassium permanganate is dissolved in 40 water, then 100 DEG C of hydro-thermal 10h, success
Prepare the manganese oxide nanometer sheet grown on carbon cloth.
Step 2: the preparation of iron oxide quantum dot: by the functional graphene of the ferric nitrate of 0.5g and 0.05g in 30ml alcohol
Stirring is to dry in solution, and the compound of iron oxide quantum dot and graphene is then resolved at 200 DEG C.
Step 3: the assembling of the double electrolyte Asymmetric Supercapacitors of water system: using aluminum plastic film and sealant by sun from
Proton exchange is fixed up with cathode sealing, and sodium sulfite electrolyte is instilled cathode portion from reserved opening.It then again will oxidation
Manganese is fixed on cation-exchange membrane another side, and three sides are sealed with sealant and aluminum plastic film, instills NaOH electrolyte, most
Device is assembled by hot sealing afterwards.
Embodiment 4
The preparation of first step manganese oxide: 0.15g potassium permanganate is dissolved in 40 water, then 100 DEG C of hydro-thermal 10h, success
Prepare the manganese oxide nanometer sheet grown on carbon cloth.
Step 2: the preparation of iron oxide quantum dot: by the functional graphene of the ferric nitrate of 0.5g and 0.05g in 30ml alcohol
Stirring is to dry in solution, and the compound of iron oxide quantum dot and graphene is then resolved at 200 DEG C.
Step 3: the assembling of the double electrolyte Asymmetric Supercapacitors of water system: using aluminum plastic film and sealant by sun from
Proton exchange is fixed up with cathode sealing, and sodium sulfite electrolyte is instilled cathode portion from reserved opening.It then again will oxidation
Manganese is fixed on cation-exchange membrane another side, and three sides are sealed with sealant and aluminum plastic film, instills dilute sulfuric acid electrolyte, finally
Device is assembled by hot sealing.
Claims (8)
1. the method based on sodium sulfite electrolyte building Asymmetric Supercapacitor, which is characterized in that specific step is as follows:
Positive electrode is separated with negative electrode material iron oxide with cation-exchange membrane, electrolyte is instilled in anode portion, in cathode
Sodium sulfite electrolyte is instilled, MnO is made in encapsulation2//Fe2O3The double electrolyte Asymmetric Supercapacitors of water system.
2. the method according to claim 1, wherein the positive electrode is selected from manganese oxide, ruthenium-oxide or oxygen
Change cobalt.
3. the method according to claim 1, wherein the negative electrode material is selected from iron oxide quantum dot and graphite
The composite material or nanometer rods iron oxide of alkene.
4. the method according to claim 1, wherein the electrolyte of the anode portion is selected from neutral, acidity
Or alkaline electrolyte.
5. according to the method described in claim 4, it is characterized in that, the electrolyte of the anode portion is selected from sodium sulphate, hydrogen
Potassium oxide or dilute sulfuric acid electrolyte.
6. the method according to claim 1, wherein the concentration of the sodium sulfite electrolyte is 0.2M-2M.
7. the method according to claim 1, wherein preferably, the cation-exchange membrane is CMI7000.
8. the asymmetric super capacitor based on sodium sulfite electrolyte made from method according to any one of claims 1 to 7
Device.
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Cited By (1)
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CN113113676A (en) * | 2021-03-29 | 2021-07-13 | 南京理工大学 | Method for expanding voltage of water system energy storage device by introducing competitive type oxidation-reduction reaction |
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