CN101465421A - Nickle zinc secondary battery anode - Google Patents
Nickle zinc secondary battery anode Download PDFInfo
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- CN101465421A CN101465421A CNA2007101250930A CN200710125093A CN101465421A CN 101465421 A CN101465421 A CN 101465421A CN A2007101250930 A CNA2007101250930 A CN A2007101250930A CN 200710125093 A CN200710125093 A CN 200710125093A CN 101465421 A CN101465421 A CN 101465421A
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- secondary battery
- battery anode
- graphite
- zinc secondary
- nickel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to a nickel-zinc secondary battery anode and relates to the technical field of battery manufacturing. The nickel-zinc secondary battery anode is composed of a current carrier and an anode material coated on the current carrier; the current carrier is graphite paper, or is composed of one or a plurality of graphite, carbon black, powdered carbon, carbon fiber, powdered nickel, metal powder or metal fiber which are coated on a basal body material; the cathode material is composed of active material, conducting material, additives and caking agents. Compared with the prior art, the nickel-zinc secondary battery anode has the beneficial effects that: the current carrier which is composed of the graphite paper or the basal body material of which is coated with graphite and the like is used as battery anode and overcomes the disadvantages that foam nickel is used as the current carrier of the battery anode in the traditional method, thus greatly reducing the using amount of the nickel and greatly reducing cost and lightening environment pollution.
Description
Technical field
The present invention relates to the Ni-MH secondary battery technical field.
Background technology
Along with the direction of various electrical equipments towards miniaturization, portability develops, battery has obtained application more and more widely.Battery can be divided into primary cell and secondary cell, and primary cell can't recharge after having put electricity, can only discard.Secondary cell is called rechargeable battery again, after having put electricity, can charge again, recycles.So, in electric tool, electronic toy, generally adopt secondary cell.
Nickel-cadmium cell is a kind of secondary cell that uses morely traditionally, but nickel-cadmium cell has had more and more countries that the use of nickel-cadmium cell is limited because used the noxious substance cadmium in the negative pole.Solution is exactly to seek the substitute of nickel-cadmium cell.Ni-MH battery is wherein a kind of, but the cost of Ni-MH battery is higher.In addition, nickel-zinc cell enters people's the visual field gradually, and the negative pole in the nickel-zinc cell uses zinc, has replaced the cadmium that in the past used, and zinc is nontoxic, and is environmentally friendly.And, produce the production equipment that nickel-zinc cell can use nickel-cadmium cell to a great extent, reduce and produce input cost.
The electric core of nickel-zinc cell is made up of anodal, negative pole and the insulation diaphragm that is between the both positive and negative polarity.Positive pole is to be coated with coated positive pole material to make on carrying object.The effect of carrying object mainly is two aspects, and an aspect has provided the carrier that positive electrode depends on, and another aspect is the electric current that produces when collecting positive electrode generation electrochemical reaction, plays the effect of conduction.In traditional production technology, anodal carrying object is selected foaming nickel for use.Foaming nickel is made having on the plastic foam of a large amount of holes plating nickel, has good porosity and conductivity, but along with the rise of nickel valency, the price of foaming nickel also rises thereupon, causes battery cost constantly to increase.In addition, nickel belongs to heavy metal, be diffused in the environment after, also can produce harmful effect, so seeking cheap, eco-friendly material substitution foaming nickel becomes crucial problem as anodal carrying object to environment.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome and use the weak point of foaming nickel as the anode carrying object in the prior art, a kind of positive pole of novel nickel zincium battery is provided.
Technical solution of the present invention is: nickle zinc secondary battery anode, constitute by carrying object and the positive electrode that is coated on the carrying object, carrying object is a graphite paper, or for apply one or more formations in graphite, carbon black, carbon dust, carbon fiber, nickel powder, metal dust or the metallic fiber on basis material, positive electrode is made up of active material, electric conducting material, additive, binding agent.
Graphite paper by as the carbon fiber of the phosphorus content 80%～99.99%WT of material of main part with constitute as the carbon fiber powder of the phosphorus content 80%～99.99%WT of packing material or graphite powder or carbon dust or its.Its thickness is 0.1mm～0.4mm, and tensile strength is more than or equal to 3MPa, and graphite purity is 80%～99.99%.
The material of basis material for not reacting with the electrolyte of battery can be nylon or vinylon or polyolefin or fluorinated polyolefin or polyamide, or in the above-mentioned material one or more are composited by single or multiple lift.Thickness is 0.1mm～0.35mm, and tensile strength is more than or equal to 3MPa.
Applying graphite etc. on basis material is to adopt the mode of dip-coating, spraying or roll-in to apply.
Active material in the positive electrode is a nickel hydroxide, and percentage by weight is 60%～80%; Additive is oxide, rare earth element and the compound thereof of compound, zinc or the zinc of cobalt or cobalt, and percentage by weight is 3%～10%.Electric conducting material is one or more compositions in graphite, carbon black, carbon dust, carbon fiber, nickel powder, metal dust or the metallic fiber, and percentage by weight is 15%～25%.Binding agent is one or more in sodium carboxymethylcellulose (CMC), hydroxypropyl methylcellulose (HPMC), polytetrafluoroethylene (PTFE), butadiene-styrene rubber (SBR), the polyvinyl alcohol (PVA), and percentage by weight is 1%～5%.
The present invention's beneficial effect compared with prior art is: use carrying object that materials such as applying graphite by graphite paper or on basis material the constitutes carrying object as anode, overcome and used the weak point of foaming nickel in the past as anode carrying object traditional method, can reduce the use amount of nickel greatly, thereby reduce cost greatly, and alleviated environmental pollution.
Description of drawings
Fig. 1 is the battery cathode structure schematic diagram of use graphite paper of the present invention as the battery electrode carrying object;
Fig. 2 is that use of the present invention applies the battery cathode structure schematic diagram as the battery electrode carrying object such as graphite on basis material.
Embodiment
Embodiment 1:
Present embodiment is an example to make nickel zinc AA600mAh battery, and the carrying object of nickle zinc secondary battery anode adopts graphite paper, and the thickness of graphite paper is 0.1mm, and tensile strength is 3MPa, and graphite purity is 99.9%.
Graphite paper by the carbon fiber of phosphorus content 99.99%WT as material of main part, with phosphorus content be the carbon fiber powder of 99.99%WT as packing material, suppress forming.Graphite paper is cut into the strip that width is 38mm, and lug on the 80mm bonding of every then interval promptly can be used as anodal carrying object and uses.
Positive electrode is formulated as by weight percentage: the positive electrode active materials nickel hydroxide is 70%, and the auxiliary additive cobalt protoxide is 5%, and electric conducting material graphite is 20%, and binding agent is that 4% ptfe emulsion adds 1% hydroxypropyl methylcellulose.It is even that the nickel hydroxide of said ratio, cobalt protoxide, graphite are added in the ball-grinding machine ball milling, obtain the dry mash of positive electrode, then, the ptfe emulsion of said ratio and hydroxypropyl methylcellulose are added water to mix, add again in the dry mash of positive electrode, stir, promptly make the positive electrode of pasty state.
As shown in Figure 1, be coated with coated positive pole material respectively, form on the positive electrode coating 3 under the coating 2 and positive electrode, in drying oven, dry, be rolled into the positive plate that thickness is 0.5mm again at the upper and lower surface of graphite paper 1.Every interval 80mm cuts with the positive plate of strip, makes the positive plate that specification is 80mm * 38mm.With anode pole piece, barrier film, cathode pole piece combination battery battery core, be encapsulated into battery steel shell, inject electrolyte, seal, nickel-zinc cell.
Make nickel zinc AA600mAh battery according to present embodiment, the cycle performance and the self-discharge performance of battery made mensuration:
(1) cycle performance of battery
Test condition is as follows:
(1) be charging 72 minutes under the condition of 600mA at electric current;
(2) after charging finishes battery was shelved 30 minutes;
(3) electric current with 600mA arrives 1.3V with battery discharge;
(4) set by step (1)～(3) circulation 200 times.
Test result is as shown in table 1.
Table 1 battery capacity and the cycle-index table of comparisons
| Cycle-index | The 1st time | The 50th time | The 100th time | The 150th time | The 200th time |
| Battery capacity (mAh) | 623 | 611 | 597 | 579 | 553 |
As can be seen from Table 1, the nickel-zinc cell that uses anode of the present invention to make, behind 200 times cycle charge-discharge, battery capacity remains on more than 85% of initial capacity.
(2) self-discharge of battery performance
Test battery in accordance with the following methods:
(1) the 600mA charging is 72 minutes, shelves 30 minutes, discharges into 1.3V with 600mA again, obtains discharge capacity C
0
(2) the 600mA charging is 72 minutes, shelves 28 days, discharges into 1.3V with 600mA again, obtains discharge capacity C
1
(3) (C
0-C
1)/C
0* 100%, be a moon self discharge.
Test result is: the moon self discharge of battery is 24%, as can be seen, uses the self-discharge rate of the nickel-zinc cell of anode manufacturing of the present invention to adhere to specification.
Embodiment 2:
Present embodiment is an example to make nickel zinc AA600mAh battery, and the employing of anode carrying object applies graphite and makes on basis material, and basis material is selected nylon for use.Those skilled in the art also is easy to and can realizes, can replace the graphite that uses in the present embodiment with in graphite, carbon black, carbon dust, carbon fiber, nickel powder, metal dust or the metallic fiber one or more, constitute basis material and replace the nylon that uses in the present embodiment by single or multiple lift is compound with in nylon, vinylon or polyolefin or fluorinated polyolefin or the polyamide one or more, reach with present embodiment in the same effect of all material, here do not give unnecessary details one by one.
The thickness of basis material nylon is 0.35mm, and tensile strength is 8MPa, as shown in Figure 2, spray graphite respectively at the upper and lower surface of basis material nylon 4, the top of basis material nylon 4 is graphite linings 5, and the following of basis material 4 is graphite linings 6, promptly makes the electrode carrying object after solidifying.The electrode carrying object of making is cut into the strip that width is 38mm, and lug on the 80mm bonding of every then interval promptly can be used as anodal carrying object and uses.
Positive electrode is formulated as by weight percentage: the positive electrode active materials nickel hydroxide is 72%, the mixture of auxiliary additive zinc and zinc oxide is 5%, the conduction material is the mixture of carbon black and metal dust, accounts for 18%, and binding agent is that 4% polyethylene glycol oxide adds 1% polyvinyl alcohol.Ball milling in nickel hydroxide, zinc, zinc oxide, carbon black and the metal dust adding ball-grinding machine of said ratio is even, obtain the dry mash of positive electrode, then, polyethylene glycol oxide and polyvinyl alcohol are mixed evenly, the dry mash that adds positive electrode more fully stirs the positive electrode that obtains pasty state.
As shown in Figure 2, be coated with coated positive pole material, form on the positive electrode coating 8 under the coating 7 and positive electrode, in drying oven, dry, be rolled into the positive plate that thickness is 0.7mm again at the upper and lower surface of electrode carrying object.Every interval 80mm cuts with the positive plate of strip, makes the positive plate that specification is 80mm * 38mm.With anode pole piece, barrier film, cathode pole piece combination battery battery core, be encapsulated into battery steel shell, inject electrolyte, seal, nickel-zinc cell.
Make nickel zinc AA600mAh battery according to present embodiment, the cycle performance and the self-discharge performance of battery made mensuration:
(1) cycle performance of battery
Test condition is as follows:
(1) be charging 72 minutes under the condition of 600mA at electric current;
(2) after charging finishes battery was shelved 30 minutes;
(3) electric current with 600mA arrives 1.3V with battery discharge;
(4) set by step (1)～(3) circulation 200 times.
Test result is as shown in table 1.
Table 2 battery capacity and the cycle-index table of comparisons
| Cycle-index | The 1st time | The 50th time | The 100th time | The 150th time | The 200th time |
| Battery capacity (mAh) | 635 | 620 | 601 | 587 | 562 |
As can be seen from Table 2, the nickel-zinc cell that uses anode of the present invention to make, behind 200 times cycle charge-discharge, battery capacity remains on more than 85% of initial capacity.
(2) self-discharge of battery performance
Test battery in accordance with the following methods:
(1) the 600mA charging is 72 minutes, shelves 30 minutes, discharges into 1.3V with 600mA again, obtains discharge capacity C
0
(2) the 600mA charging is 72 minutes, shelves 28 days, discharges into 1.3V with 600mA again, obtains discharge capacity C
1
(3) (C
0-C
1)/C
0* 100%, be a moon self discharge.
Test result is: the moon self discharge of battery is 22%, as can be seen, uses the self-discharge rate of the nickel-zinc cell of anode manufacturing of the present invention to adhere to specification.
Above embodiment only enumerates for the process of explanation production nickle zinc secondary battery anode; can not see restriction as to claim of the present invention; according to feature of the present invention; associated materials in the nickle zinc secondary battery anode can use other similar materials to substitute and realize; those skilled in the art can realize without creative work according to the present invention, also is the scope of the present invention.
Claims (10)
1. nickle zinc secondary battery anode, constitute by carrying object and the positive electrode that is coated on the carrying object, it is characterized in that: carrying object is a graphite paper, or for apply one or more formations in graphite, carbon black, carbon dust, carbon fiber, nickel powder, metal dust or the metallic fiber on basis material, positive electrode is made up of active material, electric conducting material, additive, binding agent.
2. nickle zinc secondary battery anode according to claim 1 is characterized in that: the thickness of described graphite paper is 0.1mm～0.4mm, and tensile strength is more than or equal to 3MPa, and graphite purity is 80%～99.99%.
3. nickle zinc secondary battery anode according to claim 1 is characterized in that: described graphite paper by as the carbon fiber of the phosphorus content 80%～99.99%WT of material of main part with constitute as the carbon fiber powder of the phosphorus content 80%～99.99%WT of packing material or graphite powder or carbon dust or its.
4. nickle zinc secondary battery anode according to claim 1 is characterized in that: the thickness of described basis material is 0.1mm～0.35mm, and tensile strength is more than or equal to 3MPa.
5. nickle zinc secondary battery anode according to claim 1 is characterized in that: the material of described basis material for not reacting with the electrolyte of battery.
6. according to claim 1 or 4 or 5 described nickle zinc secondary battery anodes, it is characterized in that: described basis material is that in nylon or vinylon or polyolefin or fluorinated polyolefin or the polyamide one or more are composited by single or multiple lift.
7. nickle zinc secondary battery anode according to claim 1 is characterized in that: the described graphite etc. of applying on basis material is to adopt the mode of dip-coating, spraying or roll-in to apply.
8. nickle zinc secondary battery anode according to claim 1 is characterized in that: described active material is a nickel hydroxide, and percentage by weight is 60%～80%; Additive is oxide, rare earth element and the compound thereof of compound, zinc or the zinc of cobalt or cobalt, and percentage by weight is 3%～10%.
9. nickle zinc secondary battery anode according to claim 1 is characterized in that: described electric conducting material is one or more compositions in graphite, carbon black, carbon dust, carbon fiber, nickel powder, metal dust or the metallic fiber, and percentage by weight is 15%～25%.
10. nickle zinc secondary battery anode according to claim 1, it is characterized in that: described binding agent is one or more in sodium carboxymethylcellulose (CMC), hydroxypropyl methylcellulose (HPMC), polytetrafluoroethylene (PTFE), butadiene-styrene rubber (SBR), the polyvinyl alcohol (PVA), and percentage by weight is 1%～5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101250930A CN101465421A (en) | 2007-12-18 | 2007-12-18 | Nickle zinc secondary battery anode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101250930A CN101465421A (en) | 2007-12-18 | 2007-12-18 | Nickle zinc secondary battery anode |
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|---|---|
| CN101465421A true CN101465421A (en) | 2009-06-24 |
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|---|---|---|---|
| CNA2007101250930A Pending CN101465421A (en) | 2007-12-18 | 2007-12-18 | Nickle zinc secondary battery anode |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623710A (en) * | 2012-04-17 | 2012-08-01 | 河南创力新能源科技有限公司 | Foamed iron electrode and preparation method thereof |
| WO2016045622A1 (en) * | 2014-09-26 | 2016-03-31 | 苏州宝时得电动工具有限公司 | Battery, battery pack and continuous power supply |
| US10418666B2 (en) | 2013-06-28 | 2019-09-17 | Positec Power Tools (Suzhou) Co., Ltd. | Battery |
-
2007
- 2007-12-18 CN CNA2007101250930A patent/CN101465421A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623710A (en) * | 2012-04-17 | 2012-08-01 | 河南创力新能源科技有限公司 | Foamed iron electrode and preparation method thereof |
| US10418666B2 (en) | 2013-06-28 | 2019-09-17 | Positec Power Tools (Suzhou) Co., Ltd. | Battery |
| US10854928B2 (en) | 2013-06-28 | 2020-12-01 | Positec Power Tools (Suzhou) Co., Ltd. | Electrolyte and battery |
| WO2016045622A1 (en) * | 2014-09-26 | 2016-03-31 | 苏州宝时得电动工具有限公司 | Battery, battery pack and continuous power supply |
| US20170309912A1 (en) * | 2014-09-26 | 2017-10-26 | Positec Power Tools (Suzhou) Co., Ltd. | Battery, battery pack and continuous power supply |
| US11069891B2 (en) | 2014-09-26 | 2021-07-20 | Positec Power Tools (Suzhou) Co., Ltd. | Battery, battery pack and continuous power supply |
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Application publication date: 20090624 |