CN2247377Y - High capacity hydrogen storage alloy electrode - Google Patents
High capacity hydrogen storage alloy electrode Download PDFInfo
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- CN2247377Y CN2247377Y CN95227245U CN95227245U CN2247377Y CN 2247377 Y CN2247377 Y CN 2247377Y CN 95227245 U CN95227245 U CN 95227245U CN 95227245 U CN95227245 U CN 95227245U CN 2247377 Y CN2247377 Y CN 2247377Y
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- storage alloy
- hydrogen
- nickel
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Abstract
The utility model relates to a high-capacity hydrogen storage alloy electrode of a nickel-hydrogen cell. The high-capacity hydrogen storage alloy electrode of the nickel-hydrogen cell provided by the utility model uses a foamed nickel plate as a current collector and a supporter, and adopts a mixture which is composed of a quick-solidified MmNicCoMnAl system hydrogen storage alloy powder material, an electricity-conducting material and a bonding agent to coat on the surface of the foamed nickel plate; then, a negative electrode plate is manufactured by the technology of bonding and pressing. By the manufacturing method provided by the utility model, the high-capacity hydrogen storage alloy electrode plate which is easy to activate and has stable electrical conductivity can be manufactured in a large scale.
Description
The utility model relates to a kind of high capacity hydrogen storage alloy electrode, specifically, the utility model relates to a kind of hydrogen-occlussion alloy electrode that is used for Ni-MH battery with novel coating layer.
Since Ni-MH battery comes out from the eighties, composition, the structure of the hydrogen-occlussion alloy electrode that adopts in the battery receive publicity always, very great development has been arranged in the production control of hydrogen-storage alloy composition composition, metallurgical structure, particle size, for further improving the combination property of hydrogen-storage alloy negative pole, the special the utility model that proposes.
The purpose of this utility model is to provide a kind of high capacity hydrogen storage alloy electrode with novel coating layer, described electrode comprises substrate, the coat of being made up of rapid solidification MmNiCoMnAl series hydrogen storage alloy dusty material, electric conducting material and binding agent in two sides of substrate.
The purpose of this utility model can be achieved by following approach, selects substrate, coats coat in the side of substrate.
Be description of drawings below, can further understand the utility model in conjunction with following embodiment, wherein:
Fig. 1 is the three-dimensional section decomposing schematic representation of the chargeable AA type of big capacity Ni-MH battery that electrode described in the utility model is made;
Fig. 2 is the charge-discharge characteristic curve chart of the chargeable AA type of big capacity Ni-MH battery under 20 ℃ ± 5 ℃ conditions that electrode described in the utility model is made;
Fig. 3 is the charge-discharge characteristic curve chart of the chargeable AA type of big capacity Ni-MH battery under 0 ℃ ± 2 ℃ conditions that electrode described in the utility model is made;
Substrate described in the utility model, concretely, the substrate of hydrogen-storage alloy negative plate can adopt porous foam nickel plate, nickel coated iron wire braiding guiding principle band, punched nickel-plated steel band or fiber nickel plate.
Described conductive material refers to nickel powder, graphite powder, carbon black, acetylene carbon black.
It is prior art that sintering process and plastic bonding legal system are got cellular hydrogen-occlussion alloy electrode sheet, but the high power capacity alloy electrode of preparation of industrialization not yet is indicated in open source literature.
Rapid solidification MmNiCoMnAl series hydrogen storage alloy dusty material described in the utility model, its technology and composition have detailed description in another application case CN95109468.8 of this case applicant.
High capacity hydrogen storage alloy electrode described in the utility model comprises with the lower part:
1, the mixture of preparation hydrogen-storage alloy, electric conducting material, binding agent;
2, porous nickel mesh;
3, coat;
4, Ya Zhi coat;
Described high capacity hydrogen storage alloy electrode negative plate comprises that the particle size 150-350 order that adopts the preparation of rapid solidification MmNiCoMnAl series hydrogen storage alloy powder technology, the fine-grain of alloy powder are that 0.05-5.0 μ m, capacitance are high-purity, the high evenly fine crystal alloy powder of 260-300mAh/g.
Embodiment 1
Present embodiment adopts the substrate of porous nickel mesh as the hydrogen-storage alloy negative plate, and foamed nickel substrate is in the basic role of hydrogen-storage alloy negative plate, and the one, play the collector effect, the 2nd, filling powder active material plays a supportive role in the nickel foam space; Present embodiment adopts the porous nickel mesh of porosity 90-95%, aperture 150-400 μ m.
Can be with commercial porous nickel mesh with 500-900 ℃ of vacuum heat to eliminate residual volatile matter and to adjust the intensity plasticity ratio, eliminate residue in the porous nickel mesh to improve foamed nickel substrate electric conductivity, homogeneity and compression coil with ultrasonic wave again around processing characteristics.
The described pasty state coat of present embodiment comprises that weight ratio is the binding agent of the 3-5% of the ultra-fine black pearl carbon powder of the rapid solidification MmNiCoMnAl series hydrogen storage alloy powder of 85-95 part, 5 parts carbonyl nickel powder and 15 parts and their total weights.
Described binding agent comprises polytetrafluoroethylene (PTEE), styrol copolymer (SBS), (SEBS) etc., and appropriate amount of deionized water and fully mixing of alcohol continuation, makes it to become uniform negative material pasty mixture.
Above-mentioned polytetrafluoroethylene, styrol copolymer, SEBS can use separately, also can mix with certain proportion and use.
Because water and alcohol mainly have been the effect that mixes and form pasty state in preparation technology described in the utility model, after coating, need vacuumize before the compacting, therefore, industry technical staff just can set their consumption easily after determining coating machine, the consumption that just can determine how to adopt water and alcohol in conjunction with the kind and the consumption of the adhesive that is adopted.
On the continuously coating machine, the pasty mixture that is used for negative material, control amount spraying and applying to or the slip filling in two of refining nickel foam substrate, make the negative pole blank through vacuumize; On 300-500 ton automatic hydraulic press, use 3-5 ton/cm again
2Accurate compacting of individual or many and shearing become the hydrogen-storage alloy negative plate in the shaper of pressure.
The thickness of accurate compacting is decided by dissimilar Ni-MH batteries, is generally 0.4-0.8mm.
Embodiment 2
Present embodiment is the performance evaluation by the chargeable AA type Ni-MH battery that adopts hydrogen-storage alloy negative plate preparation described in the utility model, further specify the advantage of electrode described in the utility model, see Fig. 1, its basic structure comprises coiled battery core (1), anodal (2), negative pole (3), barrier film (4), box hat (5), bottom spacer (6), contact conductor (7), interior capping (8), sealing ring (9), ball seal valve (10), top cover (11), block (12) etc.; Wherein:
Described charging AA type Ni-MH battery is characterised in that the negative pole (3) of coiled battery core (1) adopts the compacting that bonds of rapid-solidified hydrogen-storage alloy, electric conducting material, binder mixtures and porous nickel mesh to form;
Described positive pole (2) is nickel oxide powder, the bonding compacting positive pole (2) that adds electric conducting material, binder mixtures; Also the nickel oxide powder that is complementary of active volume adds the sintered type positive pole (2) of electric conducting material.
The described big capacity of present embodiment can fill AA type nickel-hydrogen battery negative pole (3), adopts the electric conducting material with excellent activity and electric conductivity as conductive additive, as carbonyl nickel powder 255, and the ultra-fine black pearl carbon black powder of～15um.
Rapid solidification mishmetal hydrogen-storage alloy powder and electric conducting material are 80～90: 5～15 by weight ratio.In closed container, mix, add the binder solution 2-5% (based on the weight of alloyed powder and electric conducting material) of preparations such as polytetrafluoroethylene, deionized water, alcohol, continue fully mixed paste (cream) the shape mixture that evenly becomes.
On the continuously coating machine,, make blank through vacuumize sticking with paste (cream) shape mixture control amount spraying and applying or slip filling in two of the nickel plate.Suppress again and shear.The thickness 0.4mm of hydrogen-storage alloy negative plate.
The final products activity function of gained is good, can reach predetermined value through 1-2 the cycle of discharging and recharging.
Used rapid solidification mishmetal hydrogen-storage alloy is thin brilliant, microcrystalline powder material in the present embodiment, does not have crystal defect, capacitance 260-300mAh, particle size 150-350 order, the high-purity segregation-free hydrogen-storage alloy of fine-grain 0.05-5.0 μ m.
Adopt porosity 90-95% in the present embodiment, aperture 150-400um, thickness 1.0-3.0mm makes with extra care porous nickel mesh.And carry out 500-900 ℃ of vacuum heat, then with the residual impurity in the ultrasonic wave removing foamed nickel substrate.
Embodiment 3
Adopt the foregoing description with spline structure electrode as both positive and negative polarity, described electrode is made Ni-MH battery, the charge-discharge characteristic curve of battery such as Fig. 2 and Fig. 3.
From Fig. 2, can recognize, adopted that electrode described in the utility model makes AA type Ni-MH battery under 20 ℃ ± 5 ℃: charging, 0.48A, 3.5 hours; Discharge, 1. 1.1A, 1.0V, 2. 0.22A, 1.0v; ". " is 1210mAh among the figure; " * " is 1260mAh among the figure.
From Fig. 3, can recognize, adopt AA type Ni-MH battery that electrode described in the utility model makes under 0 ℃ ± 2 ℃: charging, 0.48A, 3.5 hours; Discharge, 1. 1.1A, 0.9V; ". " is 990mAh among the figure.
The capacitance of the described Ni-MH battery of present embodiment is 1100-1300mAh, and voltage is 1.2V, the 1C end voltage 〉=1.15V that discharges, and discharge rate is less than 18% automatically; The power supply that can be used for mobile phone or portable computer.
There is not the segregation of crystal defect, alloy-free composition in the coat of electrode described in the utility model, therefore has good corrosion resistance and anti-micro mist voltinism; Two of electrode advantage described in the utility model is easily-activated, has improved productivity ratio thereby can shorten the Ni-MH battery cycle of changing into greatly; Bonding pressing high capacity hydrogen storage alloy electrode negative plate described in the utility model is suitable for industrialized mass.
Claims (10)
1, a kind of high capacity hydrogen storage alloy electrode is characterized in that the coat that described high capacity hydrogen storage alloy electrode comprises substrate, is made up of hydrogen-storage alloy, electric conducting material, binding agent.
2, electrode according to claim 1 is characterized in that described substrate is a porous foam nickel plate.
3, electrode according to claim 1 is characterized in that described substrate is nickel coated iron wire braiding guiding principle band, punching nickel plated steel strip, fiber nickel plate.
4, electrode according to claim 1 is characterized in that described electrode is that thickness is the negative pole of 0.4-0.8MM.
5, electrode according to claim 1 is characterized in that described electric conducting material is to be selected from a kind of of nickel powder, graphite powder, carbon black, acetylene carbon black or their mixture.
6, electrode according to claim 1 is characterized in that described coat is positioned at two sides of substrate.
7, electrode according to claim 1 is characterized in that described hydrogen-storage alloy is the rapid solidification MnNiCoMnAl series hydrogen storage alloy powder of granularity 150-350 order, fine-grain 0.05-5.0 μ m, capacitance 260-300mAh/g.
8,, it is characterized in that described substrate is the foamed nickel substrate of porosity 90-95%, aperture 150-400 μ m according to claim 1 or 2 described electrodes.
9, electrode according to claim 1 is characterized in that described coat is that weight ratio is 85-95: the coat that 5: 15 hydrogen-storage alloy powder, electric conducting material, carbonyl nickel powder and ultra-fine black pearl carbon black are formed.
10, electrode according to claim 1, it is characterized in that described bonding agent be consumption be hydrogen-storage alloy powder and electric conducting material weight 3-5% be selected from polytetrafluoroethylene (PFFE), styrol copolymer (SBS), (SEBS) resin or their mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95227245U CN2247377Y (en) | 1995-12-30 | 1995-12-30 | High capacity hydrogen storage alloy electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95227245U CN2247377Y (en) | 1995-12-30 | 1995-12-30 | High capacity hydrogen storage alloy electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2247377Y true CN2247377Y (en) | 1997-02-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95227245U Expired - Fee Related CN2247377Y (en) | 1995-12-30 | 1995-12-30 | High capacity hydrogen storage alloy electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2247377Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466145A (en) * | 2015-01-11 | 2015-03-25 | 方美卿 | Method for preparing negative electrode of high-capacity nickel-metal hydride secondary battery |
-
1995
- 1995-12-30 CN CN95227245U patent/CN2247377Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466145A (en) * | 2015-01-11 | 2015-03-25 | 方美卿 | Method for preparing negative electrode of high-capacity nickel-metal hydride secondary battery |
| CN104466145B (en) * | 2015-01-11 | 2017-06-16 | 温州三金电池有限公司 | A kind of negative pole preparation method of high power capacity nickel-hydrogen secondary cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: SHENJIAN METALLURGICAL + MECHANOELECTRONIC TECH. ENGRG. CO., SHANGHAI TO: SHANGHAI YOUSHEN ELECTRIC APPLICANCE CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 201107 Shanghai Minhang District Zhuzhai Zhen Bei Zhai Road Patentee after: Shanghai friend Electric Co., Ltd. Address before: No. 142, Shanghai, Tianlin Road Patentee before: Shenjian Metallurgical Electromechanical Technology Engineering Co., Shanghai |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |