CN101174676A - Alkaline non-mercury button battery capable of effectively preventing flatulence and liquid leakage and method of manufacturing the same - Google Patents
Alkaline non-mercury button battery capable of effectively preventing flatulence and liquid leakage and method of manufacturing the same Download PDFInfo
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- CN101174676A CN101174676A CNA2007100307791A CN200710030779A CN101174676A CN 101174676 A CN101174676 A CN 101174676A CN A2007100307791 A CNA2007100307791 A CN A2007100307791A CN 200710030779 A CN200710030779 A CN 200710030779A CN 101174676 A CN101174676 A CN 101174676A
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The present invention provides an alkaline mercury-free button cell that can effectively prevent the flatulence and the liquid leakage and the manufacturing method of the cell. Compared with the prior art, the present invention is provided with a layer of nickel galvanization layer both on the outer surface and the inner concave surface of a cathode cover; (an additional-coated copper galvanization layer and) an indium galvanization or a tin galvanization layer or an indium-tin alloy galvanization layer arranged at the inner concave surface covers from the inner concave surface of the cathode cover to the outer surface of the cathode cover, which is higher than the bottom of the cathode cover and is lower than the top of the cathode cover within 0.2 mm; the cathode cover is made in the way that a nickel galvanization layer, (a copper galvanization layer and) an indium galvanization layer or a tin galvanization layer is coated simultaneously both on the inner and the outer surfaces of the cathode cover, and then the extra galvanization layer on the outer surface and the top of the cathode cover is removed. The cell of the present invention has the advantages that the flatulence and the liquid leakage of the mercury-free button cell can be effectively prevented; in addition, with the manufacturing method provided by the present invention, the mercury-free button cell is easier to be manufactured, and the quality of the product is easier to be guaranteed.
Description
Technical field
The present invention relates to button cell and manufacture method thereof, particularly relate to the manufacture method of a kind of alkaline non-mercury button battery and this battery.
Background technology
People require can not add poisonous mercury in the battery in order to protect environment.If but traditional button cell does not add and contacts between calamine cream and the battery cathode lid metal in the mercury battery and can make mercury-free button battery generation inflatable and leakage problem.To this, the main way that present people solve mercury-free button battery inflatable and leakage is to electroplate one deck indium or tin layer on the inner concave of button battery cathode cap, intercept contacting of no mercury calamine cream and button battery cathode cap metal in the mercury-free button battery with this indium or tin layer, solve the inflatable and the leakage of mercury-free button battery with this.But this way still fails to solve fully the inflatable of mercury-free button battery existence and the problem of leakage; reason is; the matrix of negative cover itself is coarse; and only on the inner concave of negative cover indium plating or tin layer difficulty very big; indium or tin electrodeposited coating that these reasons usually can cause being plated produce coarse; pin hole is arranged, easy oxidation is arranged, defective such as split, come off, thereby cause mercury-free button battery to produce the problem of inflatable and leakage.
Summary of the invention
The purpose of this invention is to provide a kind of alkaline non-mercury button battery that can effectively prevent inflatable and leakage.
Another object of the present invention is the manufacture method that a kind of this battery is provided simultaneously, and this method not only can make this mercury-free button battery manufacture simply, simultaneously, also is easy to guarantee the quality of product.
The alkaline non-mercury button battery that can effectively prevent inflatable and leakage provided by the invention comprises and is shaped as spill, its periphery has the U-shaped revers turn part, the negative cover of making by the layer of metal sheet, negative pole does not have the mercury calamine cream, sealing ring, barrier film, positive plate and anodal shell, said positive plate is loaded on the bottom of anodal shell, barrier film is arranged on it, said negative pole does not have in the recess that the mercury calamine cream is loaded on negative cover, the negative cover back-off is on barrier film, between the U-shaped revers turn part of negative cover and the anodal shell sealing ring is installed, it is characterized in that: it has one deck nickel electrodeposited coating earlier on outside in whole said negative cover, then has one deck indium electrodeposited coating or tin electrodeposited coating or indium stannum alloy electrodeposited coating to cover the end face that is higher than the bottom of negative cover and is lower than negative cover to the outer surface periphery of negative cover from the inner concave of said negative cover again and is not less than 0.2 millimeter scope.
The present invention is owing to the whole smooth nickel coating of one deck of having electroplated on the surfaces externally and internally of negative cover, thereby coarse indium layer, tin layer or the indium stannum alloy layer of plating of causing that has so just prevented negative cover base material in the course of processing also can be coarse, pin hole is arranged and oxidation is arranged, phenomenon such as easily split, come off, cause battery inflatable, leakage.In addition, the present invention is because indium coating or tin coating or indium stannum alloy coating cover the bottom that is higher than negative cover to the neighboring of negative cover from the inner concave of negative cover, like this, when the no mercury calamine cream of threading is made battery in the negative cover, no mercury calamine cream in the negative cover also is not easy from the bottom leakage of negative cover and other Metal Contact of negative cover, so that mercury-free button battery produces the problem of inflatable and leakage.
Layer of copper coating can also be provided with between nickel coating on the said negative cover and indium coating or tin coating or the indium stannum alloy coating, the better effects if of indium or tin coating or indium stannum alloy coating plating can be made like this, the promptly easier quality that plates and guarantee coating.
The method that the present invention makes the above-mentioned alkaline non-mercury button battery that can effectively prevent inflatable and leakage is as follows:
Step 1: with the shape machine-shaping of button battery cathode cap routinely of a slice sheet metal, periphery forms the U-shaped revers turn part;
Step 2: electroplating work procedure is to cleaning, degrease through the negative cover of step 1 machine-shaping routinely, then a. is earlier at the whole surfaces externally and internally of the negative cover plated with nickel coating that powers on, and then indium plating coating or tin coating or indium stannum alloy coating, perhaps, b. electroplating nickel coating on the whole surfaces externally and internally of negative cover earlier earlier, add copper facing coating again, and then indium plating coating or tin coating or indium stannum alloy coating, cleaning, drying at last;
Step 3:a. removes indium coating or tin coating or the indium stannum alloy coating that the cathode cover exterior face end face on electroplating does not need, perhaps, b. remove copper coating and indium coating or tin coating or the indium stannum alloy coating that the cathode cover exterior face end face on electroplating does not need, the part of removing is, the bottom that the cathode cover exterior face is higher than negative cover is not less than in 0.2 millimeter scope more than any point part to end face to being lower than the negative cover end face;
Step 4: negative pole is not had mercury calamine cream, dip-coating to be had sealing ring, the barrier film of glue, the positive plate that contains alkaline electrolyte, anodal shell and assembles in a conventional way by the negative cover that above-mentioned steps processes, and makes the said alkaline non-mercury button battery that can prevent inflatable and leakage effectively of the present invention.
In the manufacture method of the present invention, because negative cover has adopted nickel coating, (copper coating and) indium coating or tin coating or indium stannum alloy coating plate respectively on the outside in negative cover integral body earlier together, and then remove the way of unwanted on the cathode cover exterior face end face (copper coating and) indium coating or tin coating or indium stannum alloy coating, so indium coating on its inner concave of negative cover or tin coating or indium stannum alloy coating are just electroplated smoothly easily, to close, free of pinholes, can not split, nothing comes off, non-oxidation, can prevent inflatable effectively, simultaneously, this method is also simple, in addition, negative cover is used for also being smoothed to close coating because of having had on the U-shaped inflection limit of sealing function, it has also strengthened the sealing of negative cover, has prevented electrolyte leakage effectively.
Description of drawings
Fig. 1 is the structural representation of mercury-free button battery;
Fig. 2 is the structural representation of negative cover;
Fig. 3 is the schematic diagram that has plated the negative cover of plating indium coating or tin coating or indium stannum alloy coating behind the nickel coating again;
Fig. 4 is a schematic diagram of having removed the negative cover of cathode cover exterior face end face indium coating or tin coating or indium stannum alloy coating;
Fig. 5 adds copper facing coating after having plated nickel coating, plates the schematic diagram of the negative cover of indium coating or tin coating or indium stannum alloy coating again;
Fig. 6 is a schematic diagram of having removed the negative cover of cathode cover exterior face end face copper coating and indium coating or tin coating or indium stannum alloy coating;
Fig. 7 and Fig. 8 are the schematic diagrames for the processing unit (plant) of removing the coating on the cathode cover exterior face.
Embodiment
One, below in conjunction with accompanying drawing in detail the said alkaline non-mercury button battery that can effectively prevent inflatable and leakage of the present invention is described in detail:
(Fig. 1) alkaline non-mercury button battery provided by the invention comprises: it is shaped as spill, its periphery has U-shaped revers turn part 1, by the negative cover 2 that the layer of metal sheet is made, negative pole does not have mercury calamine cream 3, sealing ring 4, barrier film 5, positive plate 6 and anodal shell 7, said positive plate 6 is loaded on the bottom of anodal shell 7, barrier film 5 is arranged on it, said negative pole does not have in the recess that mercury calamine cream 3 is loaded on negative cover 2, and negative cover 2 back-offs are installed sealing ring 4 between the U-shaped revers turn part 1 of negative cover 2 and the anodal shell 7 on barrier film 5.Dip-coating has glue on the sealing ring 4, so that better sealing.Positive plate 6 contains alkaline electrolyte.
(Fig. 2) said negative cover 2 can be one deck iron plate or stainless steel substrates.
(Fig. 4) said negative cover 2 its one deck nickel coating 8 is arranged on outside earlier in whole, then have one deck indium coating or tin coating or indium stannum alloy coating 9 to cover the end face B that is higher than the bottom A of negative cover 2 and is lower than negative cover 2 to the outer surface periphery of negative cover 2 again and be not less than 0.2 millimeter scope from the inner concave of said negative cover 2.
(Fig. 6) in order to make the better effects if of indium or tin coating or 9 platings of indium stannum alloy coating, the promptly easier quality that plates and guarantee coating also can be provided with layer of copper coating 10 between nickel coating 8 on the said negative cover 2 and indium coating or tin coating or the indium stannum alloy coating 9.
(Fig. 4, when Fig. 6) copper coating 10 of said negative cover 2 its inner concaves and indium coating or tin coating or indium stannum alloy coating 9 cover the end face B that is higher than the bottom A of negative cover 2 and is lower than negative cover 2 to the outer surface periphery of negative cover 2 and are not less than 0.2 millimeter scope from the inner concave of negative cover 2, the position of C in the middle of U-shaped revers turn part 1 outside preferably, like this, the upper semisection of U-shaped revers turn part 1 outside of negative cover 2 is a nickel coating 8, and it combines its sealing effectiveness than copper coating 9 with sealing ring 4, perhaps indium coating or tin coating or indium stannum alloy coating 9 combine with sealing ring 4 and will get well.
Its thickness of each coating of negative cover 2 can be between 1 μ m to 10 μ m, and best effect is between 1 μ m to 5 μ m, according to test, so more can guarantee coating smooth, to close, thereby prevent mercury-free button battery inflatable and leakage better.
Two, below in conjunction with accompanying drawing in detail the said manufacture method that can effectively prevent the mercury-free button battery of inflatable and leakage of the present invention is described in detail:
Step 1:(Fig. 2) with the shape machine-shaping of button battery cathode cap 2 routinely of a slice sheet metal, periphery forms U-shaped revers turn part 1;
Step 2: electroplating work procedure cleans, degreases the negative cover 2 through step 1 machine-shaping routinely, then a. (Fig. 3) is earlier at the whole surfaces externally and internally of the negative cover 2 plated with nickel coating 8 that powers on, and then indium plating coating or tin coating or indium stannum alloy coating 9, perhaps, b. (Fig. 5) electroplating nickel coating 8 earlier earlier on the whole surfaces externally and internally of negative cover, add copper facing coating 10 again, and then indium plating coating or tin coating or indium stannum alloy coating 9, cleaning, drying at last;
Step 3:a. (Fig. 3, Fig. 4) removes and electroplates indium coating or tin coating or the indium stannum alloy coating 9 that good negative cover 2 outer surface end face B do not need, perhaps, b. (Fig. 5, Fig. 6) removes and electroplates the copper coating that adds plating 10 and indium coating or tin coating or the indium stannum alloy coating 9 that good negative cover 2 outer surface end face B do not need, the part of removing is, the bottom A that negative cover 2 outer surfaces are higher than negative cover 2 is not less than in 0.2 millimeter scope more than any point part to end face B to being lower than negative cover end face B;
Step 4: negative pole is not had mercury calamine cream 3, dip-coating to be had sealing ring 4, the barrier film 5 of glue, the positive plate 6 that contains alkaline electrolyte, anodal shell 7 and assembles in a conventional way, seals by the negative cover 2 that above-mentioned steps processes, and makes the said alkaline non-mercury button battery that can prevent inflatable and leakage effectively of the present invention.The method that the copper coating 10 of removal negative cover 2 and indium coating or tin coating or indium stannum alloy coating 9 can adopt chemical medicinal liquid to soak.
(Fig. 7) use a processing unit (plant), it has a container 11, is provided with a boss 12 in the container 11, on the boss 12 with one deck absorbent material 13 as sponge etc., 13 put into chemical medicinal liquid on absorbent material; Use an air adsorbent equipment 14, be attached on this adsorbent equipment 14 with its negative cover 2 suck-back, by this adsorbent equipment 14 battery cathode lid 2 parts that will remove coating be immersed in the chemical medicinal liquid that absorbent material 13 adsorbed to remove the coating that does not need then mercury-free button battery.
(Fig. 8) also can use another processing unit (plant), it has a container 15, is provided with a boss 16 in the container 15, on the boss 16 with one deck absorbent material 17 as sponge etc., 17 put into chemical medicinal liquid on absorbent material; Use a magnetic attaching to put 18, with it negative cover 2 suck-backs of mercury-free button battery are attached to this magnetic attaching and put on 18, by this adsorbent equipment 18 battery cathode lid 2 parts that will remove coating are immersed in the chemical medicinal liquid that absorbent material 17 adsorbed to remove the coating that does not need then.
Chemical medicinal liquid has component to be: a. ferric trichloride 6-12 part (solid), copper chloride 3-6 part (solid), water 200-400 part, the chemical liquid of concentrated sulfuric acid 5-10 part; With component be: b. chromic acid sheet 80-120 part (solid), water 600-1200 part, nitric acid 50-100 part, the chemical medicinal liquid of hydrochloric acid 25-50 part, the former can embathe indium coating or indium stannum alloy coating, and the latter can embathe detin coating or copper coating.
Claims (8)
1. can effectively prevent the alkaline non-mercury button battery of inflatable and leakage, it comprises and is shaped as spill, its periphery has the U-shaped revers turn part, the negative cover of making by the layer of metal sheet, negative pole does not have the mercury calamine cream, sealing ring, barrier film, positive plate and anodal shell, said positive plate is loaded on the bottom of anodal shell, barrier film is arranged on it, said negative pole does not have in the recess that the mercury calamine cream is loaded on negative cover, the negative cover back-off is on barrier film, between the U-shaped revers turn part of negative cover and the anodal shell sealing ring is installed, it is characterized in that: it has one deck nickel electrodeposited coating earlier on outside in whole said negative cover, then has one deck indium electrodeposited coating or tin electrodeposited coating or indium stannum alloy electrodeposited coating to cover the end face that is higher than the bottom of negative cover and is lower than negative cover to the outer surface periphery of negative cover from the inner concave of said negative cover again and is not less than 0.2 millimeter scope.
2. the alkaline non-mercury button battery that can effectively prevent inflatable and leakage according to claim 1 is characterized in that: said one deck indium electrodeposited coating or tin electrodeposited coating or indium stannum alloy electrodeposited coating cover to cathode cover exterior face periphery U-shaped revers turn part outside position intermediate from the inner concave of negative cover.
3. the alkaline non-mercury button battery that can effectively prevent inflatable and leakage according to claim 1 and 2 is characterized in that: also have the layer of copper electrodeposited coating between the nickel electrodeposited coating of said negative cover and indium electrodeposited coating or tin electrodeposited coating or the indium stannum alloy electrodeposited coating.
4. the alkaline non-mercury button battery that can effectively prevent inflatable and leakage according to claim 1 and 2 is characterized in that: its thickness of each electrodeposited coating on the negative cover is between 1 μ m to 5 μ m.
5. the alkaline non-mercury button battery that can effectively prevent inflatable and leakage according to claim 3 is characterized in that: its thickness of each electrodeposited coating on the negative cover is between 1 μ m to 5 μ m.
6. can effectively prevent the production method of the alkaline non-mercury button battery of inflatable and leakage, it is characterized in that:
Step 1: with the shape machine-shaping of button battery cathode cap routinely of layer of metal sheet, periphery forms the U-shaped revers turn part;
Step 2: electroplating work procedure is to cleaning, degrease through the negative cover of step 1 machine-shaping routinely, then a. is earlier at the whole surfaces externally and internally of the negative cover plated with nickel electrodeposited coating that powers on, and then indium plating electrodeposited coating or tin electrodeposited coating or indium stannum alloy electrodeposited coating, perhaps, b. first electric plated with nickel electrodeposited coating earlier on the whole surfaces externally and internally of negative cover, add the copper facing electrodeposited coating again, and then indium plating electrodeposited coating or tin electrodeposited coating or indium stannum alloy electrodeposited coating, cleaning, drying at last;
Step 3:a. removes indium electrodeposited coating or tin electrodeposited coating or the indium stannum alloy electrodeposited coating that the cathode cover exterior face end face on electroplating does not need, perhaps, b. remove and electroplate the copper electrodeposited coating that adds plating and indium electrodeposited coating or tin electrodeposited coating or the indium stannum alloy electrodeposited coating that good cathode cover exterior face end face does not need, the part of removing is, the bottom that the cathode cover exterior face is higher than negative cover is not less than in 0.2 millimeter scope more than any point part to end face to being lower than the negative cover end face;
Step 4: negative pole is not had mercury calamine cream, sealing ring, barrier film, positive plate, anodal shell and assemble in a conventional way, seal, make the said alkaline non-mercury button battery that can prevent inflatable and leakage effectively of the present invention by the negative cover that above-mentioned steps processes.
7. the production method that can effectively prevent the alkaline non-mercury button battery of inflatable and leakage according to claim 6, it is characterized in that: the method for indium coating that the cathode cover exterior face on electroplating of removing does not need or tin coating or indium stannum alloy coating and the copper electrodeposited coating employing chemical medicinal liquid immersion that adds plating, promptly use a processing unit (plant), it has a container, be provided with a boss in the container, has one deck absorbent material on the boss, on absorbent material, put into chemical medicinal liquid, use vacuum or magnetic adsorbent equipment, with it the negative cover suck-back is attached on this adsorbent equipment, the part that negative cover will be removed coating by this adsorbent equipment is immersed in the chemical medicinal liquid that absorbent material adsorbed to remove the coating that does not need then.
8. the production method of alkaline non-mercury button battery according to claim 7, it is characterized in that: said chemical medicinal liquid has component to be: a. ferric trichloride 6-12 part (solid), copper chloride 3-6 part (solid), water 200-400 part, the chemical liquid and the component of concentrated sulfuric acid 5-10 part are: b. chromic acid sheet 80-120 part (solid), water 600-1200 part, nitric acid 50-100 part, the chemical liquid of hydrochloric acid 25-50 part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710030779A CN101174676B (en) | 2007-10-10 | 2007-10-10 | Alkaline non-mercury button battery capable of effectively preventing flatulence and liquid leakage and method of manufacturing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710030779A CN101174676B (en) | 2007-10-10 | 2007-10-10 | Alkaline non-mercury button battery capable of effectively preventing flatulence and liquid leakage and method of manufacturing the same |
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| CN101174676A true CN101174676A (en) | 2008-05-07 |
| CN101174676B CN101174676B (en) | 2010-05-19 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299457B (en) * | 2008-05-09 | 2010-06-02 | 华南师范大学 | Method for treating surface of negative electrode cover of mercury-free alkaline zinc-manganese and zinc-silver button cell |
| CN103560214A (en) * | 2013-11-16 | 2014-02-05 | 佛山市南海新光电池材料有限公司 | Mercury-free and lead-free environment-friendly button cell and manufacturing method thereof |
| CN103618095A (en) * | 2013-02-07 | 2014-03-05 | 卢鉴全 | Non-mercury button battery and preparation method thereof |
| CN103700787A (en) * | 2013-12-19 | 2014-04-02 | 陈光毅 | Cover explosion prevention button battery |
| CN106876619A (en) * | 2017-03-24 | 2017-06-20 | 徐良秀 | Negative cover of button mercury-free battery and preparation method thereof |
| CN107513740A (en) * | 2017-07-10 | 2017-12-26 | 佛山市南海区琪德新能源科技有限公司 | A kind of button battery cathode cap electroplating technology |
| CN110364645A (en) * | 2019-06-18 | 2019-10-22 | 深圳清华大学研究院 | Mercury-free button cells cathode cover material and its preparation method and application |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6794082B2 (en) * | 2000-09-08 | 2004-09-21 | Sony Corporation | Alkaline battery |
| CN2514498Y (en) * | 2001-10-19 | 2002-10-02 | 何永基 | Non-mercury-alkaline button cell |
| JP4851707B2 (en) * | 2004-12-15 | 2012-01-11 | セイコーインスツル株式会社 | Method for producing alkaline battery |
| CN201112441Y (en) * | 2007-10-11 | 2008-09-10 | 新利达电池实业（德庆）有限公司 | Alkaline mercury-free button cell capable of effectively preventing gas-expansion and liquid-leakage |
-
2007
- 2007-10-10 CN CN200710030779A patent/CN101174676B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299457B (en) * | 2008-05-09 | 2010-06-02 | 华南师范大学 | Method for treating surface of negative electrode cover of mercury-free alkaline zinc-manganese and zinc-silver button cell |
| CN103618095A (en) * | 2013-02-07 | 2014-03-05 | 卢鉴全 | Non-mercury button battery and preparation method thereof |
| CN103560214A (en) * | 2013-11-16 | 2014-02-05 | 佛山市南海新光电池材料有限公司 | Mercury-free and lead-free environment-friendly button cell and manufacturing method thereof |
| CN103700787A (en) * | 2013-12-19 | 2014-04-02 | 陈光毅 | Cover explosion prevention button battery |
| CN103700787B (en) * | 2013-12-19 | 2016-10-05 | 陈光毅 | Cover explosion prevention button battery |
| CN106876619A (en) * | 2017-03-24 | 2017-06-20 | 徐良秀 | Negative cover of button mercury-free battery and preparation method thereof |
| CN107513740A (en) * | 2017-07-10 | 2017-12-26 | 佛山市南海区琪德新能源科技有限公司 | A kind of button battery cathode cap electroplating technology |
| CN110364645A (en) * | 2019-06-18 | 2019-10-22 | 深圳清华大学研究院 | Mercury-free button cells cathode cover material and its preparation method and application |
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