CN102683652A - Anode of nickel-metal hydride battery and preparation method of anode - Google Patents
Anode of nickel-metal hydride battery and preparation method of anode Download PDFInfo
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- 229910052987 metal hydride Inorganic materials 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 106
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 16
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 16
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 14
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 54
- 239000011777 magnesium Substances 0.000 claims description 35
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 32
- 239000011230 binding agent Substances 0.000 claims description 26
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 16
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 16
- 150000002815 nickel Chemical class 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000000975 co-precipitation Methods 0.000 claims description 8
- 230000000536 complexating effect Effects 0.000 claims description 8
- 238000002425 crystallisation Methods 0.000 claims description 8
- 230000008025 crystallization Effects 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000000748 compression moulding Methods 0.000 claims description 7
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical group [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 7
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 abstract description 22
- 239000011149 active material Substances 0.000 abstract description 10
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- 239000011263 electroactive material Substances 0.000 abstract description 3
- 239000010405 anode material Substances 0.000 abstract 2
- 239000007767 bonding agent Substances 0.000 abstract 2
- -1 Polytetrafluoroethylene Polymers 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 abstract 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 229910006650 β-Ni(OH)2 Inorganic materials 0.000 abstract 1
- 229910006630 β—Ni(OH)2 Inorganic materials 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 238000007599 discharging Methods 0.000 description 6
- 239000012071 phase Substances 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910018095 Ni-MH Inorganic materials 0.000 description 2
- 229910018477 Ni—MH Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004087 circulation Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- MEYZYGMYMLNUHJ-UHFFFAOYSA-N tunicamycin Natural products CC(C)CCCCCCCCCC=CC(=O)NC1C(O)C(O)C(CC(O)C2OC(C(O)C2O)N3C=CC(=O)NC3=O)OC1OC4OC(CO)C(O)C(O)C4NC(=O)C MEYZYGMYMLNUHJ-UHFFFAOYSA-N 0.000 description 1
- 229910006279 γ-NiOOH Inorganic materials 0.000 description 1
Classifications
-
- 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
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses an anode of a nickel-metal hydride battery and a preparation method of the anode. The anode comprises a current collector and an anode material filled and coated on the current collector, wherein the anode material comprises 2-5wt% of bonding agent, 80-90wt% of Mg-doped beta-Ni(OH)2 and 8-15wt% of nickel powder. Compared with the prior art, the invention has the advantages that the doping of Mg is favorable for increasing the utilization rate of nickel electroactive materials, increasing the discharge potential of a nickel electrode, prolonging the service life of the nickel electrode and improving the usability and the large-current discharge capacity of the nickel electrode in a wide temperature range; and furthermore, HPMC (Hydroxy Propyl Methyl Cellulose) and PTFE (Polytetrafluoroethylene) are adopted as the bonding agent to form a layer of dense three-dimensional mesh structure on the surface of the anode, so that the expansion of a polar plate in a charge/discharge is inhibited, in addition, the falling of active materials can be reduced, and the cyclic life of the nickel electrode is better prolonged.
Description
Technical field
The present invention relates to Ni-MH battery, relate in particular to anode of nickel-metal hydride battery and preparation method thereof.
Background technology
Ni (OH)
2Be widely used in Ni/Cd as positive active material, Ni/Zn, Ni/Fe is in the alkaline batteries such as Ni/MH.It exists two kinds of crystal structures, α-Ni (OH)
2And β-Ni (OH)
2Main β-the Ni (OH) that uses in the current battery industry
2As positive electrode, but pure β-Ni (OH)
2Chemical property comes with some shortcomings.For example it is the P type semiconductor material; Differ greatly between conductivity when discharging and recharging and the solid phase diffusion of protons speed; Oxidizing potential and oxygen deposition potential are more approaching, overcharge to be easy to generate the very little γ-NiOOH of density and to cause that electrode expand to damage etc., therefore adopt pure Ni (OH)
2The electrode of processing is difficult to satisfy the requirement of high power, great current cell.Doping is to improve Ni (OH)
2One of main path of chemical property, the application of promotion nickel-based battery and development.What research was maximum in dopant is the Co element, secondly is Zn, Cd, Al, C, rare earth element, Cu based compound, Ca based compound etc.; Doped with metal elements is but reported seldom in short period, and wherein, Li is with the form adding of electrolyte.
Binding agent is the important component part of Ni-MH battery both positive and negative polarity, plays active material powder and electrode matrix are bonded together, and guarantees electrode moulding and the effect that normally discharges and recharges.It has very important influence to the performance of electrode and even entire cell.Adopt appropriate binding agent can obtain bigger capacity; Reduce internal resistance; Improve the discharge voltage plateau and the large current discharging capability of battery, and to the raising of cycle performance of battery, the reduction of pressing in during charging and the minimizing of self-discharge rate etc. all have bigger effect.Binding agent commonly used at present has CMC and PTFE, because CMC is hydrophilic binding agent, PTFE is the binding agent of hydrophobicity, and the two coupling can overcome shortcoming separately, accomplishes to have complementary advantages, but still exists active material utilization not high, the shortcoming that internal resistance is bigger.
Summary of the invention
The objective of the invention is to overcome the deficiency that above-mentioned prior art exists, a kind of anode of nickel-metal hydride battery and preparation method thereof is provided.This anode of nickel-metal hydride battery has higher nickel electroactive material utilance, discharge potential and good useful life, the serviceability in wide temperature range and large current discharging capability.
The objective of the invention is to realize through following technical scheme:
The present invention relates to a kind of anode of nickel-metal hydride battery, comprise on collector and the collector and to fill the positive electrode that applies, said positive electrode comprises that mass percentage content is respectively the β-Ni (OH) of 2%～5% binding agent, 80%～90% doped with Mg
2With 8%～15% nickel powder.
Preferably, the β-Ni of said doped with Mg (OH)
2Get through the preparation of homogeneous phase complexing coprecipitation, be specially: NaOH is added in the mixed solution of magnesium sulfate and nickel salt, reaction is to generating crystallization; Wash after the Separation of Solid and Liquid, drying promptly gets β-Ni (OH) of said Mg
2The mol ratio of the nickel salt of said adding, magnesium sulfate and NaOH is 2:0.1～0.3:2～3.
Further preferably, said nickel salt is nickelous sulfate or nickel nitrate.
Preferably, said binding agent is that mass ratio is the HPMC and the PTFE of 1:1～1.5.
The invention still further relates to a kind of preparation method of aforementioned anode of nickel-metal hydride battery, comprise the steps:
A, employing homogeneous phase complexing coprecipitation prepare the β-Ni (OH) of doped with Mg
2
B, with the β-Ni (OH) of the doped with Mg that makes among the step a
2Mass percent with 80%～90% and mass percent are after 8%～15% nickel powder mixes, and add mass percent and are 2%～5% binding agent and stir and process pulpous state, and blade coating is in collector;
After c, 85 ℃～110 ℃ oven dry, compression moulding.
Preferably, said step a is specially: NaOH is added in the mixed solution of magnesium sulfate and nickel salt, reaction is to generating crystallization; Wash after the Separation of Solid and Liquid, drying promptly gets β-Ni (OH) of said Mg
2The mol ratio of the nickel salt of said adding, magnesium sulfate and NaOH is 2:0.1～0.3:2～3.
Preferably, the binding agent among the said step b is that mass ratio is the HPMC and the PTFE of 1:1～1.5.
Compared with prior art, the present invention has following beneficial effect:
1, adopts the β-Ni (OH) of doped with Mg
2As positive electrode, the doping of Mg can not change β-Ni (OH)
2Crystal formation, also improved nickel electroactive material utilance, the discharge potential that has improved nickel electrode and useful life simultaneously, improve serviceability and the large current discharging capability of nickel electrode in wide temperature range.
2, adopt HPMC and PTFE coupling as binding agent, formed the fine and close tridimensional network of one deck on anodal surface, suppressed the expansion of pole plate in the charge and discharge process, and can reduce coming off of active material, improved the cycle life of nickel electrode.
Description of drawings
Fig. 1 is the cycle life comparison diagram;
Fig. 2 is the XRD analysis collection of illustrative plates.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.Following examples will help those skilled in the art further to understand the present invention, but not limit the present invention in any form.Should be pointed out that to those skilled in the art, under the prerequisite that does not break away from the present invention's design, can also make some adjustment and improvement.These all belong to protection scope of the present invention.
Comparative Examples 1
The anode of nickel-metal hydride battery of this Comparative Examples comprises and fills the positive electrode that applies on collector and the collector that said positive electrode comprises that mass percentage content is respectively 2% binding agent, β-Ni (OH) of 90%
2With 8% nickel powder.Concrete preparation method is following:
1), with β-Ni (OH)
2Mass percent with 90% and mass percent are after 8% nickel powder mixes, and add mass percent and are 2% binding agent (mass ratio is HPMC and the PTFE of 1:1) and stir and process pulpous state, and blade coating is in collector;
3), after 85 ℃ of oven dry, compression moulding.
Comparative Examples 2
The anode of nickel-metal hydride battery of this Comparative Examples comprises on collector and the collector and to fill the positive electrode that applies, and said positive electrode comprises that mass percentage content is respectively the β-Ni (OH) of 2% binding agent, 90% doped with Mg
2With 8% nickel powder.Concrete preparation method is following:
1), adopt homogeneous phase complexing coprecipitation to prepare the β-Ni (OH) of doped with Mg
2: NaOH is added in the mixed solution of magnesium sulfate and nickelous sulfate, reaction is to generating crystallization; Wash after the Separation of Solid and Liquid, drying promptly gets the β-Ni (OH) of said doped with Mg
2The mol ratio of the nickelous sulfate of said adding, magnesium sulfate and NaOH is 2:0.1:2;
2), with the β-Ni (OH) of the doped with Mg that makes in the step 1)
2Mass percent with 90% and mass percent are after 8% nickel powder mixes, and add mass percent and are 2% binding agent (mass ratio is CMC and the PTFE of 1:1) and stir and process pulpous state, and blade coating is in collector;
3), after 85 ℃ of oven dry, compression moulding.
Embodiment 1
The anode of nickel-metal hydride battery of present embodiment comprises on collector and the collector and to fill the positive electrode that applies, and said positive electrode comprises that mass percentage content is respectively the β-Ni (OH) of 2% binding agent, 90% doped with Mg
2With 8% nickel powder.Concrete preparation method is following:
1), adopt homogeneous phase complexing coprecipitation to prepare the β-Ni (OH) of doped with Mg
2: NaOH is added in the mixed solution of magnesium sulfate and nickelous sulfate, reaction is to generating crystallization; Wash after the Separation of Solid and Liquid, drying promptly gets the β-Ni (OH) of said doped with Mg
2The mol ratio of the nickel salt of said adding, magnesium sulfate and NaOH is 2:0.1:2;
2), with the β-Ni (OH) of the doped with Mg that makes in the step 1)
2Mass percent with 90% and mass percent are after 8% nickel powder mixes, and add mass percent and are 2% binding agent (mass ratio is HPMC and the PTFE of 1:1) and stir and process pulpous state, and blade coating is in collector;
3), after 85 ℃ of oven dry, compression moulding.
Embodiment 2
The anode of nickel-metal hydride battery of present embodiment comprises on collector and the collector and to fill the positive electrode that applies, and said positive electrode comprises that mass percentage content is respectively the β-Ni (OH) of 5% binding agent, 80% doped with Mg
2With 15% nickel powder.Concrete preparation method is following:
1), adopt homogeneous phase complexing coprecipitation to prepare the β-Ni (OH) of doped with Mg
2: NaOH is added in the mixed solution of magnesium sulfate and nickel nitrate, reaction is to generating crystallization; Wash after the Separation of Solid and Liquid, drying promptly gets the β-Ni (OH) of said doped with Mg
2The mol ratio of the nickel nitrate of said adding, magnesium sulfate and NaOH is 2:0.3:3;
2), with the β-Ni (OH) of the doped with Mg that makes in the step 1)
2Mass percent with 80% and mass percent are after 15% nickel powder mixes, and add mass percent and are 5% binding agent (mass ratio is HPMC and the PTFE of 1:1.5) and stir and process pulpous state, and blade coating is in collector;
3), after 110 ℃ of oven dry, compression moulding.
Embodiment 3
The anode of nickel-metal hydride battery of present embodiment comprises on collector and the collector and to fill the positive electrode that applies, and said positive electrode comprises that mass percentage content is respectively the β-Ni (OH) of 3% binding agent, 85% doped with Mg
2With 12% nickel powder.Concrete preparation method is following:
1), adopt homogeneous phase complexing coprecipitation to prepare the β-Ni (OH) of doped with Mg
2: NaOH is added in the mixed solution of magnesium sulfate and nickelous sulfate, reaction is to generating crystallization; Wash after the Separation of Solid and Liquid, drying promptly gets the β-Ni (OH) of said doped with Mg
2The mol ratio of the nickelous sulfate of said adding, magnesium sulfate and NaOH is 2:0.2:2.5;
2), with the β-Ni (OH) of the doped with Mg that makes in the step 1)
2Mass percent with 85% and mass percent are after 12% nickel powder mixes, and add mass percent and are 3% binding agent (mass ratio is HPMC and the PTFE of 1:1.2) and stir and process pulpous state, and blade coating is in collector;
3), after 100 ℃ of oven dry, compression moulding.
Embodiment 4, relatively to the Performance of nickel electrode that adopts different binding agents
There is the tangible film of one deck on the nickel electrode pole piece surface that the nickel electrode pole piece that Comparative Examples 2 and embodiment 1 are made carries out scanning electron microscopic observation: embodiment 1; And active material is below this tunic; Do not have membranaceous material between the active material and occur, explain that HPMC and PTFE only form fine and close film on the surface of pole piece; The nickel electrode pole piece surface of Comparative Examples 2 does not form a skim.This possibly be because the CMC that adopts in the Comparative Examples 2 is unstable in alkali lye, makes the film destroy of formation; And with respect to CMC; HPMC is stable in alkali lye, and pH value is unaffected in 2～12 scopes, has good filming performance; Film is colourless, transparent and tough and tensile; And issue looks in specific temperature and separate, form the gel of tridimensional network, so the film that they form has enough intensity to be unlikely to be destroyed by alkali lye.
The nickel electrode that Comparative Examples 2 and embodiment 1 are made is assembled into battery respectively and carries out the cycle life test; As shown in Figure 1, as can be seen from the figure, the cycle life of embodiment 1 is best; Obviously do not descend through discharging efficiency after 300 circulations, remain on more than 92%; And the cycle life of Comparative Examples 2 is the poorest, and discharging efficiency drops to below 70% after 300 circulations.Through cycle life test, further proved employing HPMC and PTFE as binding agent, the rete better inhibited that anodal surface forms coming off of active material, can improve the cycle life of positive pole.
β-the Ni (OH) of embodiment 5, doped with Mg that embodiment 1,2,3 is made
2
Structural characterization
Pure β-Ni (OH) to Comparative Examples 1
2β-Ni (OH) with the doped with Mg that makes among the embodiment 1,2,3
2Carry out XRD analysis, as shown in Figure 2; Compare with Comparative Examples 1, embodiment 1,2,3 peak intensities change to some extent, (101), (102), obvious wideization of the pairing diffraction maximum of (103) crystal face, but there are not MgO and Mg (OH)
2Diffraction maximum occur, explain that Mg2+ has got in the lattice of Ni; And, all there is not α-Ni (OH) along with the increase of Mg doping
2Appearance, explain that doped with Mg can not cause the variation of crystal formation; These are different with doped with Mn, Al, and doped with Mn, Al can cause that to certain content crystal formation is converted into the α type by the β type, thus the Performance of nickel electrode that influence makes.
Embodiment 6, to adopting different beta-Ni (OH)
2
Nickel electrode chemical property relatively
The nickel electrode that Comparative Examples 1 and embodiment 1,2,3 are made is assembled into battery respectively and carries out the cyclic voltammetric test, and oxidation peak current potential Va, reduction peak current potential Vc, oxygen corresponding in the cyclic voltammetric are separated out spike potential (oxygen evolution potential) V
0And difference each other is as shown in table 1:
Table 1
| Vc | Va | V 0 | Va-Vc | V 0-Va | |
| Comparative Examples 1 | 285 | - | - | - | - |
| Embodiment 1 | 318 | 582 | 754 | 264 | 172 |
| Embodiment 2 | 326 | 578 | 778 | 252 | 200 |
| Embodiment 3 | 346 | 606 | 786 | 260 | 180 |
The oxidation peak of Comparative Examples 1 with analyse the oxygen peak and can't distinguish, explain that its oxidizing potential and oxygen evolution potential are very approaching, its charge efficiency and active material utilization are all lower; V
0-Va reflection be the complexity that electrode is analysed oxygen, its numerical value is big more, it is difficult to analyse oxygen, the charge efficiency of electrode and the utilance of active material are just high more, can be known by data in the table 1: nickel electrode of the present invention has good charge efficiency and active material utilization; Thereby improved the chemical property of nickel electrode.
Claims (7)
1. anode of nickel-metal hydride battery comprises and fills the positive electrode that applies on collector and the collector, it is characterized in that, said positive electrode comprises that mass percentage content is the β-Ni (OH) of 2%～5% binding agent, 80%～90% doped with Mg
2With 8%～15% nickel powder.
2. anode of nickel-metal hydride battery according to claim 1 is characterized in that, the β-Ni of said doped with Mg (OH)
2Get through the preparation of homogeneous phase complexing coprecipitation, be specially: NaOH is added in the mixed solution of magnesium sulfate and nickel salt, reaction is to generating crystallization; Wash after the Separation of Solid and Liquid, drying promptly gets the β-Ni (OH) of said doped with Mg
2The mol ratio of the nickel salt of said adding, magnesium sulfate and NaOH is 2:0.1～0.3:2～3.
3. anode of nickel-metal hydride battery according to claim 2 is characterized in that, said nickel salt is nickelous sulfate or nickel nitrate.
4. anode of nickel-metal hydride battery according to claim 1 is characterized in that, said binding agent is that mass ratio is the HPMC and the PTFE of 1:1～1.5.
5. the preparation method of anode of nickel-metal hydride battery according to claim 1 is characterized in that, comprises the steps:
A, employing homogeneous phase complexing coprecipitation prepare the β-Ni (OH) of doped with Mg
2
B, with the β-Ni (OH) of the doped with Mg that makes among the step a
2Mass percentage content with 80%～90% and mass percentage content are after 8%～15% nickel powder mixes, and add mass percentage content and are 2%～5% binding agent and stir and process pulpous state, and blade coating is in collector;
After c, 85 ℃～110 ℃ oven dry, compression moulding.
6. the preparation method of anode of nickel-metal hydride battery according to claim 4 is characterized in that, said step a is specially: NaOH is added in the mixed solution of magnesium sulfate and nickel salt, reaction is to generating crystallization; Wash after the Separation of Solid and Liquid, drying promptly gets the β-Ni (OH) of said doped with Mg
2The mol ratio of the nickel salt of said adding, magnesium sulfate and NaOH is 2:0.1～0.3:2～3.
7. the preparation method of anode of nickel-metal hydride battery according to claim 4 is characterized in that, the binding agent among the said step b is that mass ratio is the HPMC and the PTFE of 1:1～1.5.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070512A (en) * | 2015-08-06 | 2015-11-18 | 太原理工大学 | Mg-doped nano-spherical flower-shaped α-Ni(OH)2 electrode material and its preparation method |
| CN109546091A (en) * | 2018-11-07 | 2019-03-29 | 超威电源有限公司 | A kind of high-energy-density zinc-nickel cell anode preparation method |
-
2012
- 2012-05-10 CN CN2012101452651A patent/CN102683652A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070512A (en) * | 2015-08-06 | 2015-11-18 | 太原理工大学 | Mg-doped nano-spherical flower-shaped α-Ni(OH)2 electrode material and its preparation method |
| CN105070512B (en) * | 2015-08-06 | 2017-11-17 | 太原理工大学 | Mix the flower-shaped α Ni (OH) of Mg nanometer sphericals2Electrode material and preparation method thereof |
| CN109546091A (en) * | 2018-11-07 | 2019-03-29 | 超威电源有限公司 | A kind of high-energy-density zinc-nickel cell anode preparation method |
| CN109546091B (en) * | 2018-11-07 | 2021-10-26 | 超威电源集团有限公司 | Preparation method of high-specific-energy zinc-nickel battery positive electrode |
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Application publication date: 20120919 |