CN106409532A - Method for preparing multi-ion embedded supercapacitor through adoption of electrochemistry alkaline activation method - Google Patents
Method for preparing multi-ion embedded supercapacitor through adoption of electrochemistry alkaline activation method Download PDFInfo
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- CN106409532A CN106409532A CN201610922150.7A CN201610922150A CN106409532A CN 106409532 A CN106409532 A CN 106409532A CN 201610922150 A CN201610922150 A CN 201610922150A CN 106409532 A CN106409532 A CN 106409532A
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- ldh
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- nickel
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- containing cobalt
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000005518 electrochemistry Effects 0.000 title claims abstract description 18
- 230000004913 activation Effects 0.000 title claims abstract description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000007772 electrode material Substances 0.000 claims abstract description 20
- 150000002500 ions Chemical class 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000003860 storage Methods 0.000 claims abstract description 14
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 11
- 239000010941 cobalt Substances 0.000 claims abstract description 11
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 10
- 238000001994 activation Methods 0.000 claims description 33
- 239000003792 electrolyte Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 17
- 238000002484 cyclic voltammetry Methods 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 12
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims description 12
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Chemical compound [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 claims description 12
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 12
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 12
- 239000003513 alkali Substances 0.000 claims description 11
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 11
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 10
- 239000008151 electrolyte solution Substances 0.000 claims description 10
- CSNNHWWHGAXBCP-UHFFFAOYSA-L magnesium sulphate Substances [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 10
- 150000004692 metal hydroxides Chemical class 0.000 claims description 10
- 229910021503 Cobalt(II) hydroxide Inorganic materials 0.000 claims description 9
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 8
- 229910002651 NO3 Inorganic materials 0.000 claims description 8
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 7
- ASKVAEGIVYSGNY-UHFFFAOYSA-L cobalt(ii) hydroxide Chemical compound [OH-].[OH-].[Co+2] ASKVAEGIVYSGNY-UHFFFAOYSA-L 0.000 claims description 7
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 claims description 7
- 239000007832 Na2SO4 Substances 0.000 claims description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 6
- 229910052925 anhydrite Inorganic materials 0.000 claims description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 6
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Inorganic materials [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims description 6
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 6
- 239000002086 nanomaterial Substances 0.000 claims description 6
- 238000011056 performance test Methods 0.000 claims description 6
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 6
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 6
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 6
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 6
- 239000011686 zinc sulphate Substances 0.000 claims description 6
- 229920000831 ionic polymer Polymers 0.000 claims description 5
- 239000012670 alkaline solution Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 229910001960 metal nitrate Inorganic materials 0.000 claims description 2
- 229910021508 nickel(II) hydroxide Inorganic materials 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 1
- 238000004146 energy storage Methods 0.000 abstract description 13
- 150000001768 cations Chemical class 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract description 4
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 229910052723 transition metal Inorganic materials 0.000 abstract description 3
- 150000003624 transition metals Chemical class 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 230000009849 deactivation Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 15
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 13
- 229960001545 hydrotalcite Drugs 0.000 description 13
- 229910001701 hydrotalcite Inorganic materials 0.000 description 13
- RIVZIMVWRDTIOQ-UHFFFAOYSA-N cobalt iron Chemical compound [Fe].[Co].[Co].[Co] RIVZIMVWRDTIOQ-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 238000011160 research Methods 0.000 description 8
- 230000007935 neutral effect Effects 0.000 description 5
- 238000009831 deintercalation Methods 0.000 description 4
- 230000002687 intercalation Effects 0.000 description 4
- 238000009830 intercalation Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Inorganic materials [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 4
- BLJNPOIVYYWHMA-UHFFFAOYSA-N alumane;cobalt Chemical compound [AlH3].[Co] BLJNPOIVYYWHMA-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- -1 metals ion Chemical class 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002322 conducting polymer Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000021148 sequestering of metal ion Effects 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 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
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- 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
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
-
- 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)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The present invention discloses a method for preparing a multi-ion embedded supercapacitor through adoption of an electrochemistry alkaline activation method. A simple and rapid electrochemistry alkaline activation method is employed to perform activation or deactivation processing of the transition metal hydroxide containing cobalt or nickel to realize the intelligent regulation and control of storage capacity of metal cations through the hydroxide electrode materials, and is applied to an ion embedded supercapacitor. The present invention provides a universal method capable of improving the storage capacity of the ion embedded supercapacitor electrode materials, and the application range of the transition metal hydroxide electrode materials is further widened in the energy storage field.
Description
Technical field
The invention belongs to inorganic nano material synthesis field, prepare polyion particularly to a kind of electrochemistry alkali activation method embedding
Enter the more pervasive method of formula ultracapacitor.
Background technology
With the continuous improvement of scientific and technical constantly progressive and human living standard, people are for the demand of material life
It has been not limited solely to solve the basic living problems, but pursued more convenient, highly efficient, more colorful life.Nowadays
Panoramic power driven equipment is being enriched constantly the visual field of people, but these equipment, arrives greatly electric crane, electronic
Automobile, little be invariably faced with identical problem to mobile phone, notebook computer, mp3 etc., that is, need highly efficient energy storage and confession
Can equipment.Along with the development of battery technology in recent years, the particularly extensive application of lithium ion battery, the capacity of battery is increasingly
Height, it is also more and more longer that electronic product fills the time that once electricity can be continued a journey.But in electric automobile, home electric, space flight facility
Deng the electronics field needing larger immediate current, conventional batteries face bottleneck because power density is low on using.In
This although traditional capacitor charge-discharge velocity is fast, have extended cycle life, there is also shortcomings simultaneously.Such as capacity density is too
Low, self-discharge phenomenon is serious, operating voltage is low, and these all greatly limit its practicality.Therefore seek that there is high ratio simultaneously
Capacity and high-specific-power, excellent performance and cheap, cleaning the new forms of energy device such as have extended cycle life, and is energy neck in world wide
One of the most concerned problem of scientists in domain.
In order that energy storage device can have high power density and energy density simultaneously, and good stable circulation
Property, scientific research personnel proposes the concept of ultracapacitor.It combines conventional batteries and the advantage of traditional capacitor, when having charging
Between short, long service life, good temp characteristic, energy saving and the features such as environmental protection, be expected to become a kind of emerging high-efficiency energy-storage
Device.Ultracapacitor can be divided into double layer capacitor and pseudocapacitors from energy storage mechnism.The ultracapacitor of research at present
Electrode material is concentrated mainly on material with carbon element, conducting polymer and inorganic, metal oxide/hydroxide etc..Although super capacitor
Utensil has the advantages that many tempting, but it develops further and practical is still faced with huge challenge.This is concentrated mainly on：
First, electrode material is difficult to meet high-energy-density, the need of fast charging and discharging and long service life in actual applications simultaneously
Ask.Although by Material cladding or micro-nano structure regulation and control, people achieve certain entering in super capacitor material research field
Exhibition, but seek efficiently, low-cost super capacitor electrode material still suffers from challenging；2nd, super based on alkaline electrolyte
Capacitor is still faced with the low shortcoming of energy storage potential window, and these all govern the practicalization of ultracapacitor.
In order to solve these problems, scientific research personnel is on the basis of original ultracapacitor it is proposed that ion embedded type surpasses
The concept of level capacitor.It is different from double layer capacitor and fake capacitance capacitor, relies primarily on metal cation in electrode material
The quick intercalation/deintercalation of material surface or inside is storing and to discharge electric charge.In this course, because metal cation is embedding
Not there is redox reaction with electrode material, therefore it has more with respect to conventional metals ion battery when entering/deviating from
High power density, you can realize more quickly discharge and recharge.In addition the electrolyte master used by ion embedded type ultracapacitor
If neutral metal salt electrolyte, therefore it has higher energy storage potential window with respect to traditional ultracapacitor.At present
Research for ion embedded type electrode material for super capacitor is concentrated mainly on metal carbides (MCX), metal sulfide
(MSX) and metal oxide (MOX) on, wherein MXene as a kind of new laminated metal carbide with satisfactory electrical conductivity,
Attract the continuous concern of scientific research personnel, have become as the main force leading the development of ion embedded type electrode material for super capacitor
Army.Although scientific research personnel has been achieved for very big entering in the research for ion embedded type electrode material for super capacitor
Step, but also face problems on the whole, such as：First, electrode material store metal ion ability is low, poorly conductive, system
Standby cost height etc., these are required for developing the Novel electric having more preferable performance of the quick intercalation/deintercalation of suitable cation further
Pole material；2nd, most of electrode material is just for Li+There is preferable intercalation/deintercalation performance, and for other metal cations
(Na+、K+、Ca2+、Mg2+、Zn2+、Al3+) there is no storage performance or poor performance.But to consider from earth's crust content, Li+On ground
Content in shell is relatively minimum with other metal cations, therefore develops the electrode being suitable for other metal cation intercalation/deintercalation
Material is extremely urgent.
Content of the invention
The present invention be directed to current ion insertion-host electrode materials storage metal ion ability is low, poorly conductive, preparation
The deficiency of the aspects such as cost height, proposes with metal hydroxides (MOHX) as novel ion embedded type electrode of super capacitor material
Material, improves the metal ion storage performance of electrode material by simple electrochemistry alkali activation method.The present invention based on letter
The concrete operation step that single quickly electrochemistry alkali activation method prepares the embedded ultracapacitor of polyion is as follows：
1). using the metal hydroxides nano material containing cobalt or nickel as positive pole, 20 50mL concentration are the alkalescence of 1 5g/L
Solution as electrolyte, by cyclic voltammetry, in 1 100mV s-1Sweep speed under, in the current potential of 0 0.1V to 0 0.8V
Under window, scan round 1 50 times, carry out activation process；
2). using step 1) through the metal hydroxides nano material containing cobalt or nickel for the activation process as positive pole, 20
50mL concentration be the alkaline solution of 1 5g/L as electrolyte, by cyclic voltammetry, in 1 100mV s-1Sweep speed under,
Under the potential window of 0 (- 0.1V) to 0 (- 1.5V), scan round 1 50 times, carry out process of deactivating；
3). step 1) through the metal hydroxides containing cobalt or nickel for the activation process or step 2) through deactivating
The metal hydroxides containing cobalt or nickel processing is as positive pole, many with the nitrate of 1 5g/L or sulfate electrolyte solution composition
The embedded ultracapacitor of ion, carries out ion storage performance test.
Step 1) or 2) described in the alkaline solution as electrolyte be：One or more of KOH, NaOH, LiOH.
Step 1) in used containing cobalt hydroxide be：Co(OH)2、CoNi-LDH、CoFe-LDH、CoAl-LDH、CoMn-
One or more of LDH, CoV-LDH.
Step 1) in used containing nickel hydroxide be：Ni(OH)2、NiFe-LDH、NiAl-LDH、NiMn-LDH、NiV-
One or more of LDH.
Step 3) in metal nitrate salt electrolyte used be：LiNO3、NaNO3、KNO3、Ca(NO3)2、Mg(NO3)2Or Zn
(NO3)2.
Step 3) in metal sulfate salt electrolyte used be：Li2SO4、Na2SO4、K2SO4、CaSO4、MgSO4Or ZnSO4.
It is an advantage of the current invention that：By a kind of simple and quick electrochemistry alkali activation method to the hydroxide containing cobalt or nickel
Activated or deactivated process it is achieved that such hydroxide electrode material intelligence to various metals cation storage capacity
Regulation and control, can be efficiently applied to the embedded ultracapacitor of ion；Provide that a kind of brand-new can to increase substantially ion embedding
Enter the more pervasive method of formula electrode material for super capacitor energy-storage property；Widen transition metal hydroxide class further
Electrode material is in the range of application of energy storage field.
Brief description
Fig. 1 be metal hydroxides electrochemistry alkali activation in embodiment 1 and deactivate and metal cation embed de-
Go out mechanism figure.
Fig. 2 is the ferro-cobalt hydrotalcite (being represented with AA and BA respectively) before and after electrochemistry alkali activation process in embodiment 1
Cyclic voltammetry curve to the storage of different metal cation.
Fig. 3 is the ferro-cobalt hydrotalcite (being represented with AA and BA respectively) before and after electrochemistry alkali activation process in embodiment 1
Charging and discharging curve to the storage of different metal cation.
Fig. 4 is the cobalt in embodiment 1 after electrochemistry alkali activation (being represented with AA) and (being represented with DA) process of deactivating
The intelligent control cyclic voltammetry curve to lithium ion storage capacity for the molten iron talcum.
Fig. 5 be in embodiment 1 the ferro-cobalt hydrotalcite after electrochemistry alkali activation process through the charge and discharge of continuous 10000 times
Stability curve after electrical testing.
Specific embodiment
Embodiment 1
1). activation process is carried out to ferro-cobalt hydrotalcite：
a:Prepare the KOH solution that 50ml concentration is 5g/L as electrolyte；
b:Using ferro-cobalt hydrotalcite nano array as positive pole, by cyclic voltammetry, in 100mV s-1Sweep speed under,
Under the potential window of 0 0.6V, scan round 5 times, carry out activation process；
2). process of deactivating is carried out to ferro-cobalt hydrotalcite：
a:Prepare the KOH solution that 50ml concentration is 5g/L as electrolyte；
b:Using step 1) the ferro-cobalt hydrotalcite nano array through activation process as positive pole, by cyclic voltammetry,
In 100mV s-1Sweep speed under, under the potential window of 0 (- 0.6V), scan round 5 times, carry out process of deactivating；
3). neutral electrolyte solution electrochemistry energy-storage property is probed into
Using step 1) or 2) through activation process or process of deactivating ferro-cobalt hydrotalcite as positive pole, respectively in 5g/L
Nitrate (LiNO3、NaNO3、KNO3、Ca(NO3)2、Mg(NO3)2、Zn(NO3)2) or sulfate (Li2SO4、Na2SO4、K2SO4、
CaSO4、MgSO4、ZnSO4) carry out ion storage performance test in electrolyte solution.
Embodiment 2
1). activation process is carried out to cobalt aluminum hydrotalcite：
a:Prepare the NaOH solution that 50ml concentration is 4g/L as electrolyte；
b:Using cobalt aluminum hydrotalcite nano array as positive pole, by cyclic voltammetry, in 100mV s-1Sweep speed under,
Under the potential window of 0 0.5V, scan round 10 times, carry out activation process；
2). process of deactivating is carried out to ferro-cobalt hydrotalcite：
a:Prepare the NaOH solution that 50ml concentration is 4g/L as electrolyte；
b:Using step 1) the ferro-cobalt hydrotalcite nano array through activation process as positive pole, by cyclic voltammetry,
In 50mV s-1Sweep speed under, under the potential window of 0 (- 0.5V), scan round 10 times, carry out process of deactivating；
3). neutral electrolyte solution electrochemistry energy-storage property is probed into
Using step 1) or 2) through activation process or process of deactivating cobalt aluminum hydrotalcite as positive pole, respectively in 5g/L
Nitrate (LiNO3、NaNO3、KNO3、Ca(NO3)2、Mg(NO3)2、Zn(NO3)2) or sulfate (Li2SO4、Na2SO4、K2SO4、
CaSO4、MgSO4、ZnSO4) carry out ion storage performance test in electrolyte solution.
Embodiment 3
1). activation process is carried out to cobalt hydroxide：
a:Prepare the LiOH solution that 50ml concentration is 6g/L as electrolyte；
b:Using cobalt hydroxide nano-array as positive pole, by cyclic voltammetry, in 100mV s-1Sweep speed under, 0
Under the potential window of 0.1V, scan round 20 times, carry out activation process；
2). process of deactivating is carried out to cobalt hydroxide：
a:Prepare the LiOH solution that 50ml concentration is 6g/L as electrolyte；
b:Using step 1) the cobalt hydroxide nano-array through activation process as positive pole, by cyclic voltammetry,
100mV s-1Sweep speed under, under the potential window of 0 (- 0.1V), scan round 10 times, carry out process of deactivating；
3). neutral electrolyte solution electrochemistry energy-storage property is probed into
Using step 1) or 2) through activation process or process of deactivating cobalt hydroxide as positive pole, respectively 5g/L's
Nitrate (LiNO3、NaNO3、KNO3、Ca(NO3)2、Mg(NO3)2、Zn(NO3)2) or sulfate (Li2SO4、Na2SO4、K2SO4、
CaSO4、MgSO4、ZnSO4) carry out ion storage performance test in electrolyte solution.
Embodiment 4
1). activation process is carried out to nickel hydroxide：
a:Prepare the KOH solution that 50ml concentration is 5g/L as electrolyte；
b:Using nickel hydroxide nano array as positive pole, by cyclic voltammetry, in 1-100mV s-1Sweep speed under,
Under the potential window of 0 0.1V, scan round 5 times, carry out activation process；
2). process of deactivating is carried out to nickel hydroxide：
a:Prepare the KOH solution that 50ml concentration is 5g/L as electrolyte；
b:Using step 1) the nickel hydroxide nano array through activation process as positive pole, by cyclic voltammetry,
100mV s-1Sweep speed under, under the potential window of 0 (- 0.1V), scan round 5 times, carry out process of deactivating；
3). neutral electrolyte solution electrochemistry energy-storage property is probed into
Using step 1) or 2) through activation process or process of deactivating nickel hydroxide as positive pole, respectively 5g/L's
Nitrate (LiNO3、NaNO3、KNO3、Ca(NO3)2、Mg(NO3)2、Zn(NO3)2) or sulfate (Li2SO4、Na2SO4、K2SO4、
CaSO4、MgSO4、ZnSO4) carry out ion storage performance test in electrolyte solution.
Claims (6)
1. a kind of electrochemistry alkali activation method prepares the method for the embedded ultracapacitor of polyion it is characterised in that concrete operations
Step is as follows：
1). using the metal hydroxides nano material containing cobalt or nickel as positive pole, 20 50mL concentration are the alkaline solution of 1 5g/L
As electrolyte, by cyclic voltammetry, in 1 100mV s-1Sweep speed under, in the potential window of 0 0.1V to 0 0.8V
Under, scan round 1 50 times, carry out activation process；
2). using step 1) through the metal hydroxides nano material containing cobalt or nickel for the activation process as positive pole, 20 50mL are dense
Spend alkaline solution for 1 5g/L as electrolyte, by cyclic voltammetry, in 1 100mV s-1Sweep speed under, 0 (-
0.1V) to the potential window of 0 (- 1.5V), scan round 1 50 times, carry out process of deactivating；
3). step 1) through the metal hydroxides containing cobalt or nickel for the activation process or step 2) through deactivating process
The metal hydroxides containing cobalt or nickel as positive pole, form polyion with the nitrate of 1 5g/L or sulfate electrolyte solution
Embedded ultracapacitor, carries out ion storage performance test.
2. method according to claim 1 is it is characterised in that step 1) or 2) described in the alkalescence as electrolyte molten
Liquid is：One or more of KOH, NaOH, LiOH.
3. method according to claim 1 is it is characterised in that step 1) in used containing cobalt hydroxide be：Co(OH)2、
One or more of CoNi-LDH, CoFe-LDH, CoAl-LDH, CoMn-LDH, CoV-LDH.
4. method according to claim 1 is it is characterised in that step 1) in used containing nickel hydroxide be：Ni(OH)2、
One or more of NiFe-LDH, NiAl-LDH, NiMn-LDH, NiV-LDH.
5. the preparation method of electrode material according to claim 1 is it is characterised in that step 3) in metal nitrate used
Salt electrolyte is：LiNO3、NaNO3、KNO3、Ca(NO3)2、Mg(NO3)2Or Zn (NO3)2.
6. the preparation method of electrode material according to claim 1 is it is characterised in that step 3) in metal sulfate used
Salt electrolyte is：Li2SO4、Na2SO4、K2SO4、CaSO4、MgSO4Or ZnSO4.
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