CN100399603C - Non-aqueous solution electrochemical device polar plate and its manufacturing method - Google Patents
Non-aqueous solution electrochemical device polar plate and its manufacturing method Download PDFInfo
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- CN100399603C CN100399603C CNB2006100393877A CN200610039387A CN100399603C CN 100399603 C CN100399603 C CN 100399603C CN B2006100393877 A CNB2006100393877 A CN B2006100393877A CN 200610039387 A CN200610039387 A CN 200610039387A CN 100399603 C CN100399603 C CN 100399603C
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Abstract
The present invention discloses a nonaqueous solution electrochemical device polar plate which comprises an electrode layer and a current collecting body, wherein the thickness of the current collecting body is between 1 and 200. Electrochemical active materials are contained in the electrode layer. The present invention is characterized in that the polar plate is provided with the electrode layer covered on the surface of one side of the current collecting body; through holes are distributed in the current collecting body; the area of every through hole is smaller than and equal to 10 square millimeters, and the total area of the holes in the covering range of the electrode layer is 10% to 95% of the whole covering area. Simultaneously, the present invention also discloses a preparation method of the nonaqueous solution electrochemical device polar plate. The present invention reduces one-off coating, has simple production technique, and is easy to control in the process of preparation. The present invention is applied to a curled or laminated battery, and has the advantages of high specific power of batteries which are covered by the porous current collecting body of the two surfaces of an electrode, high specific power of the pulse of the batteries which are covered by the porous current collecting body of one surface of every battery, and low manufacturing cost.
Description
Technical field
The present invention relates to a kind of pole piece that comprises electrochemical active material, be specifically related to a kind of pole piece that is used for nonaqueous electrochemistry device (especially once or secondary cell), comprise positive pole (negative electrode) and negative pole (anode), when it uses, there are the barrier film of organic solvent electrolyte solution or polymeric colloid electrolyte or solid electrolyte to separate by immersion between positive pole and the negative pole, in the charge and discharge process, ion moves between both positive and negative polarity.The present invention relates to the manufacture method of this pole piece simultaneously.
Background technology
As rechargeable battery of new generation, lithium ion battery has the specific energy height, has extended cycle life, self power generation is little, do not contain characteristics such as poisonous element, present most mobile electronic device all adopts lithium ion battery, along with the further raising in the power of battery and life-span, lithium ion battery begins to be applied to electric tool, motor vehicle, uninterrupted power supply etc. gradually.Lithium ion battery is general to be adopted and comprises that the transition metal oxide that contains lithium or phosphide etc. are the positive pole of active component, carbon and and the composite material of metal and nonmetal element and oxide be the negative pole of active component, separate by the barrier film, gelation organic electrolyte, solid macromolecule electrolyte or the inorganic solid electrolyte that soak organic electrolyte solution between positive pole and the negative pole, in the inclosure battery case, respectively draw a lead from positive pole with negative pole and link to each other with the electrode pole two ends of mutually insulated.
More the lithium metal secondary battery of high-energy-density then adopts is that the transition metal oxide that do not contain lithium, sulphur and inorganic and organic compound thereof are negative electrode, lithium metal and alloy thereof are anode, are separated by the barrier film, gelation organic electrolyte, solid macromolecule electrolyte or the inorganic solid electrolyte that soak organic electrolyte solution between negative electrode and the anode.
The core component of above-mentioned electrochemical energy storing device is the battery pole piece that contains electrochemical active material.The utmost point that electrochemical potential is high is referred to as positive pole, also is referred to as negative electrode, and the utmost point that electrochemical potential is low is referred to as negative pole, also is referred to as anode.In the prior art, pole piece is a three-decker, collector in the middle of comprising and the electrode layer that is covered in the collector two sides, described collector is generally metal forming or net, usually, anodal paper tinsel or net with aluminium, titanium is collector, and negative pole is a collector with the paper tinsel or the net of copper, nickel, covered by electrode material all on the two sides of collector constitutes pole piece.
Usually, the material of electrode layer combines with collector firmly for guaranteeing it based on electrochemical active material, needs an amount of binding agent that adds, and in actual use, also can add electron conduction agent and other additive.The lithium ion cell positive electrochemical active material comprises a kind of of phosphate, oxide, silicate, aluminate, sulphur, organic compounds containing sulfur or their mixture, and the negative electricity chemically active material comprises a kind of in graphite, hard carbon material, silicon, metal, alloy, the metal oxide or their mixture.The electronic conductive material that can add is a carbon dust, carbon fiber, metal part, metallic fiber, in the conduction high polymer one or more, bonding agent are Kynoar, polytetrafluoroethylene, polyethylene glycol oxide, PPOX, polysilane, polyimides, polyvinyl alcohol, ethylene-propylene copolymer, Kynoar-hexafluoropropylene copolymer, polyacrylonitrile, polyester; butadiene-styrene rubber; polyphosphazene; sulfonated polyimide; perfluorinated polymers; poly-divinyl ethylene glycol; polyethylene glycol acrylate; polyethylene glycol methacrylate; a kind of or derivatives thereof in the polyaryl sulfonic acid; mixture; copolymer.
Because adopt above-mentioned three-decker, preparation technology's more complicated is an example with the metal forming pole piece, adopt the single face coating usually, at the one side employing slurry rubbing method covering upper electrode layer material of metal forming, drying covers upper electrode layer material, drying at another side again.On the one hand, need carry out twice coating, twice drying, required time is long, utilization rate of equipment and installations is low, on the other hand, need carry out alignment function when applying for the second time, and, require the both sides electrode layers thickness identical, to the equipment precision requirement height, complex process causes pole piece cost height thus.And if adopt the two-sided method of coating simultaneously, can make the drying after the coating that difficulty takes place, the pole piece transfer equipment is very complicated.
Those skilled in the art all think, because collector only electrifies and spreads the effect of leading, the battery charge and discharge mainly are to rely on the ion-exchange between the electrode layer to realize, thereby must to adopt above-mentioned centre be collector, and both sides are the pole piece of the three-decker formation of electrode layer.This has caused can't solving at present the problem of above-mentioned pole piece structure fabrication complex process.Simultaneously, in the pole piece of other electrochemical devices such as some capacitors, also exist same problem.
Summary of the invention
The object of the invention provides a kind of non-aqueous solution electrochemical device polar plate that improves structure, under the prerequisite that guarantees the electrochemical device performance, can simplify manufacture method; The present invention provides a kind of new manufacture method simultaneously.
For achieving the above object, the technical solution used in the present invention is: a kind of non-aqueous solution electrochemical device polar plate, comprise electrode layer and collector, collector thickness contains electrochemical active material in the described electrode layer between 1～200 micron, be provided with one deck electrode layer, described electrode layer is covered in a side surface of collector, be distributed with through hole on the described collector, the area of each through hole is smaller or equal to 10 square millimeters, and the gross area of electrode layer coverage endoporus accounts for 10～95% of whole area coverage.
In the technique scheme, the material of electrode layer and collector belongs to prior art, according to the purposes of making pole piece difference to some extent.Usually, above-mentioned pole piece can be used as positive pole, and at this moment, current collector material can adopt aluminium or titanium, and electrochemical active material comprises a kind of of phosphate, oxide, silicate, aluminate, sulphur, organic compounds containing sulfur or their mixture; And when the negative pole, current collector material can adopt copper or nickel, and electrochemical active material comprises graphite, hard carbon material, silicon, a kind of in metal, alloy, the metal oxide or their mixture.In order to guarantee combining between electrode layer and the collector, need add bonding agent in electrode layer material, bonding agent is a Kynoar, polytetrafluoroethylene, polyethylene glycol oxide, PPOX, polysilane, polyimides, polyvinyl alcohol, ethylene-propylene copolymer, Kynoar-hexafluoropropylene copolymer, polyacrylonitrile, polyester; butadiene-styrene rubber; polyphosphazene; sulfonated polyimide; perfluorinated polymers; poly-divinyl ethylene glycol; polyethylene glycol acrylate; polyethylene glycol methacrylate; a kind of or derivatives thereof in the polyaryl sulfonic acid; mixture; copolymer.Experiment showed, to add the performance that electronic conductive material can improve pole piece that described electronic conductive material is in carbon dust, carbon fiber, metal part, metallic fiber, the conduction high polymer one or more.In the prior art, usually, electrochemical active material accounts for the 5%-95% of electrode layer weight, electronic conductive material accounts for the 0%-70% of electrode layer weight, binding agent accounts for the 0.5%-30% of electrode layer weight, also can add a small amount of other additive as required, the combination electrode layer thickness of Huo Deing is the 5-5000 micron at last.The concrete prescription of any electrode layer material all goes for the making of pole piece of the present invention in the above-mentioned prior art.The shape of through hole can be cylinder, square, triangle, rhombus or irregularly shaped, and hole area generally is not more than 10mm
2, in most cases less than 2mm
2
Common notion is thought, because anodal electrode layer, the electrode layer of negative pole and electrolyte therebetween constitute battery (perhaps capacitor), collector must be positioned at the pole piece center, when collector is positioned at pole piece one side, even perforate on collector also can cause the decline of battery charging and discharging ability.Yet the present invention finds through experiment, adopts the battery of the pole piece of one-sided perforate collector, and the battery of the pole piece in the middle of its charging and discharging capabilities and collector are positioned at is approaching, and pulsed discharge ability even better; When electrode layer is positioned at central authorities, when bilateral covered the perforate collector, its charging and discharging capabilities was better than prior art.Pole piece of the present invention can be applied to multiple electrochemical device, for example, lithium or lithium ion polymer battery, electric chemical super capacitor or the like, usually, its operating voltage is 1V-5V.When being used for lithium or lithium ion polymer battery, both can be used for square layer-built battery, also can be used for square coiling battery and cylindrical battery, only parameter conditions such as the size of need change pole piece, shape, thickness.
In order to obtain the collector of perforate, the technical scheme that can adopt is that described collector is metal net shaped structure.
Perhaps, described collector is a perforated metal foil, and thickness is 10～100 microns, and electrode layers thickness is 5～5000 microns, and the through hole edge of described metal forming is provided with burr to the electrode layer direction, and burr length is smaller or equal to the thickness of electrode layer.Because the through hole edge of metal forming is provided with burr to the electrode layer direction, and the contact area of metal forming and electrode layer is significantly increased, and can strengthen both adhesions, guarantee the quality of battery.
Further technical scheme is provided with 2 layers of collector, and described collector lays respectively at two sides of electrode layer, is respectively equipped with described through hole on each collector.
Prepare this pole piece of the present invention, can adopt several different methods, the claimed technical scheme of the present invention can be used for preparing easily the pole piece that has burr structure, and its scheme is as follows:
A kind of manufacture method of non-aqueous solution electrochemical device polar plate comprises the following steps:
(1) preparation electrode layer material;
(2) described electrode layer material is compounded in a side surface of metal forming, and on metal forming, prick the hole, the area of each through hole is smaller or equal to 10 square millimeters, and the gross area of electrode layer coverage endoporus accounts for 10～95% of whole area coverage, makes metal forming form required collector;
(3) pole piece after compound is carried out hot pressing, electrode layer and collector are combined closely, obtain required pole piece.
In the technique scheme, the preparation of electrode layer material can be adopted any prior art, usually, common electrode layer material preparation can be used for coating as form slurry, and perhaps the method that shifts by the plastics base band is prepared into the self-supporting electrode layer, when adopting the slurry mode, in the described step (2), electrode layer material employing slurry rubbing method and metal forming are compound, after compound finishing, do not have a side direction opposite side of covers electrode layer to prick the hole from metal forming.When pricking the hole, can adopt the method for repeatedly acupuncture, perhaps with methods such as needle plate mould, pin roll, with speed up processing.
Optimized technical scheme is that elder generation is prepared into the self-supporting electrode layer to described electrode layer material, carries out compound with metal forming again.
At this moment, for improving work efficiency, the compound of described electrode layer and metal forming carries out simultaneously to prick the hole on metal forming.
Further technical scheme, in described step (3) before, in the another side of electrode layer compound on second layer collector, described second layer collector is metal forming or a wire netting with holes.Obtain two-sided collector thus, the structure of intermediate electrode layer.Second layer collector can directly adopt the metal forming that ties the hole, or wire netting is compound; Also can use metal forming not with holes, after compound, prick the hole again, prick the hole and can carry out simultaneously with the ground floor collector.
Yet, might not adopt above-mentioned metal forming to prepare pole piece of the present invention in the method for compound tense or the perforation of compound back.Thereby the actual method for preparing pole piece can have following several:
1. the electrode material is added appropriate solvent and be mixed and made into slurry, on metal forming, adopt slurry rubbing method preparation one to wear the electrode of material; Then, 1) do not have the material one side with needle point method (repeatedly acupuncture or roll with needle plate mould, pin) in metal forming and prick the hole, make the electrode that one side has the porous collector through concora crush or roll extrusion (containing hot pressing); Perhaps, 2) cover the last layer metal forming again in the one side of coating not, prick the hole from the two sides with needle point method (repeatedly acupuncture or roll with needle plate mould, pin) and make the electrode that there is the porous collector on the two sides; Perhaps, 3) do not have the material one side with needle point method (repeatedly acupuncture or roll with needle plate mould, pin) in metal forming and prick the hole, cover the last layer wire netting again, make the two-sided electrode that the porous collector is arranged through concora crush or roll extrusion (containing hot pressing) in the one side of coating not.
2. the electrode material is added appropriate solvent and be mixed and made into slurry, adopt the slurry rubbing method to prepare electrode, peel off base band and obtain the self-supporting electrode in the plastics base band; Then, 1) the collector metal forming is pricked the hole with needle point method (repeatedly acupuncture or roll with needle plate mould, pin), cover multicellular metal foil at the electrode single face, making the electrode that one side has the porous collector through concora crush or roll extrusion (containing hot pressing), cover multicellular metal foil simultaneously on the electrode two sides, or simultaneously covering multicellular metal foil, another side covers wire netting, is making the two-sided electrode that the porous collector is arranged through concora crush or roll extrusion (containing hot pressing); Make the single or double electrode with needle plate mould or pin roll forming hole when perhaps, 2) electrode and metal forming are compound, the another side collector of double-face electrode can be multicellular metal foil or net; Perhaps, 3) compound back with needle point method (repeatedly acupuncture or roll with needle plate mould, pin) in the bright hole of simultaneously pricking of metal forming, making the single or double electrode through concora crush or roll extrusion (containing hot pressing), the another side collector of double-face electrode can be multicellular metal foil or net.
3. the electrode material being added appropriate solvent is mixed and made into slurry and adopts the slurry rubbing method to prepare electrode in the plastics base band, peel off base band and obtain the self-supporting electrode, be covered in the one side of wire netting, making the electrode that one side has the porous collector through concora crush or roll extrusion (containing hot pressing), cover wire netting on the electrode two sides simultaneously or cover multicellular metal foil, pass through concora crush or roll extrusion (containing hot pressing) again and make the two-sided electrode that the porous collector is arranged in one side.
Certainly, when making the self-supporting electrode, be not limited to the mode that above-mentioned slurry shifts by the coating of plastics base band, also can consider to prepare the wet granular material, by extruding, methods such as mold pressing prepare the self-supporting electrode.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1. because the present invention has realized employing single-layer electrodes layer, the pole piece of individual layer or double-deck current collector structure in preparation process, can reduce once coating, and production technology is simple, is easy to control.
2. because combination electrode of the present invention is placed on the one side of wire netting or perforated metal foil or is clipped between double layer of metal net or the perforated metal foil, metal aperture allows that ion enters or deviates from, and has avoided collector two sides pole piece variable thickness to cause the problem that causes.
3. pole piece of the present invention is adapted to reel or layer-built battery, and the electrode two sides is the battery specific power height that the porous collector covers, the battery impulse specific power height that battery simultaneously covers for the porous collector, low cost of manufacture.
Description of drawings
Accompanying drawing 1 is the pole piece structural representation of the embodiment of the invention one;
Accompanying drawing 2 is the local enlarged diagram of Fig. 1;
Accompanying drawing 3 is the voltage discharge curve comparison diagram of the embodiment of the invention one and comparative example one;
Accompanying drawing 4 is the pole piece structural representation of the embodiment of the invention two;
Accompanying drawing 5 is the local enlarged diagram of Fig. 4;
Accompanying drawing 6 is the pole piece structural representation of the embodiment of the invention three;
Accompanying drawing 7 is the local enlarged diagram of Fig. 6.
Wherein: the discharge curve of the battery of prior art in [1], the comparative example one; [2], the discharge curve of the battery of the pole piece preparation of usefulness single face collector among the embodiment one; [3], with the discharge curve of the battery of the pole piece of two-sided collector preparation; [4], collector; [5], electrode layer; [6], hole.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment one: shown in accompanying drawing 1 and accompanying drawing 2, and a kind of preparation of stacked battery with nonaqueous electrolyte
1. anode pole piece manufacturing: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5Kg PVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 20 micron thickness aluminum substrates, oven dry, form electrode layer 5, do not have the material one side with the needle plate mould in metal forming and be bundled into square hole 6, hole area 0.5mm
2, the burr maximum length, cuts and makes the anode pole piece that one side has porous collector 4,300 microns of pole piece gross thickness through roll extrusion less than 300 microns.
2. cathode pole piece manufacturing: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the Copper Foil substrate, do not have the material one side with the needle plate mould in metal forming and be bundled into square hole, hole area 0.5mm
2, the burr maximum length, cuts and makes the cathode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness through roll extrusion less than 300 microns.
The area of anode pole piece is 59 * 111mm, and the area of cathode pole piece is 61 * 113mm, and the reversible capacity of LiMn2O4 is 110mAh/g, and anodal capacity is 400mAh, and the reversible capacity of native graphite is 340mAh/g, and the capacity of negative pole is 440mAh.Positive pole ear sticks insulating tape.
3. battery manufacturing
Adopt the stepped construction of one deck anode pole piece, one deck cathode pole piece, Celgard2325 micro-pore septum with 25 micron thickness between the both positive and negative polarity pole piece is isolated, keep the cathode pole piece edge than the wide 0.5mm in anode pole piece edge, battery contains 26 layers of positive pole, 27 layers of negative pole, then utmost point group is under vacuum condition dry 24 hours, and the electrode layer water content that makes pole piece is less than 50ppm.
Dry utmost point group positive pole ear perforation is connected in anodal al wiring post, and the negative lug perforation is connected in negative pole copper binding post, and positive and negative terminal adds underlay on the insulated enclosure respectively, be riveted to the both positive and negative polarity hole that covers, on cover liquid injection hole arranged in addition, the utmost point is assembled into stainless steel case, welding.Then inject electrolyte, seal.Electrolyte is 1M LiPF
6Be dissolved in the mixed solvent of vinyl carbonate and diethyl carbonate (volume ratio is 1: 1).Battery size is that 130mm is long, and 70mm is wide, and 16mm is thick, is charged to 4.2V with 2A, constant voltage 0.5h, and with the 2A discharge, discharge cut-off voltage is 3.0V again, repeats twice, capacity is 10.5Ah.
Comparative example one: adopt existing known a kind of production method to prepare stacked battery with nonaqueous electrolyte:
The anodal manufacturing: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly apply the slurry of half weight on the 20 micron thickness aluminum substrates, oven dry, second half slurry evenly is coated on the another side of above-mentioned aluminum substrates, oven dry again is through roll extrusion again, cut and make the middle positive pole that collector is arranged of two electrodes, 300 microns of pole piece gross thickness.
Negative pole is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, the slurry of half weight evenly is coated on 10 microns the Copper Foil substrate, oven dry, second half slurry evenly is coated on the another side of above-mentioned Copper Foil substrate, oven dry again is through roll extrusion again, cut and make the negative pole that one side has the porous collector, 200 microns of pole piece gross thickness.
Anodal area is 59 * 111mm, and the area of negative pole is 61 * 113mm, and the reversible capacity of LiMn2O4 is 110mAh/g, and anodal capacity is 400mAh, and the reversible capacity of native graphite is 340mAh/g, and the capacity of negative pole is 440mAh.Positive pole ear sticks insulating tape.
The manufacture method of battery is with embodiment one.
Shown in accompanying drawing 3, by three curves among the figure as seen, the discharge curve 1 of the battery of prior art is approaching in the discharge curve 2 of the battery that the pole piece of employing single face collector prepares among the embodiment one and the comparative example one, and maximum difference is in 5%, and total battery capacity basically identical; And if the pole piece that adopts two-sided collector prepares battery, its discharge curve 3 is better than the discharge curve 1 of the battery of prior art.
Embodiment two: shown in accompanying drawing 4 and accompanying drawing 5,
Anode pole piece is made: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5Kg PVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 20 micron thickness aluminum substrates, baking is to half-dried, cover last layer 20 micron thickness aluminium foils again, prick circular hole 6, hole area 0.5mm respectively in double layer of metal paper tinsel both sides with the needle plate mould
2, the burr maximum length is less than 300 microns, and oven dry through roll extrusion, cuts and makes the two sides porous collector 4 is arranged, and the centre is the anode pole piece of electrode layer 5,300 microns of pole piece gross thickness.
Embodiment three: shown in accompanying drawing 6 and accompanying drawing 7,
Anode pole piece is made: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5Kg PVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on 50 micron thickness aluminium nets, through the oven dry roll extrusion, cut and make the anode pole piece that one side has the porous collector, 300 microns of pole piece gross thickness.
The preparation method of cathode pole piece and battery is with embodiment one.
Embodiment four:
Anode pole piece is made: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5Kg PVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on 50 micron thickness aluminium nets, baking is to half-dried, be covered with the layer of aluminum net in the one side that slurry is arranged again, through the oven dry roll extrusion, cut and make the anode pole piece that one side has the porous collector, 300 microns of pole piece gross thickness.
The preparation method of cathode pole piece and battery is with embodiment one.
Embodiment five:
Anode pole piece is made: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5Kg PVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 20 micron thickness aluminum substrates, baking is to half-dried, cover last layer 50 micron thickness aluminium nets again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length, cuts and makes the anode pole piece that one side has the porous collector, 300 microns of pole piece gross thickness through the oven dry roll extrusion less than 300 microns.
The preparation method of cathode pole piece and battery is with embodiment one.
Embodiment six:
Anode pole piece is made: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5Kg PVDF (Kynoar) again mixes the formation slurry at normal temperatures, on evenly being coated at the bottom of the 50 micron thickness aluminium mesh liners, baking is to half-dried, cover last layer 20 micron thickness aluminium foils again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length, cuts and makes the anode pole piece that one side has the porous collector, 300 microns of pole piece gross thickness through the oven dry roll extrusion less than 300 microns.
The preparation method of cathode pole piece and battery is with embodiment one.
Embodiment seven:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 10 micron thickness Copper Foil substrates, baking is to half-dried, face in addition at electrode covers last layer 10 micron thickness Copper Foils again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length is less than 300 microns, and oven dry through roll extrusion, cuts and makes the anode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness.
The preparation method of anode pole piece is with embodiment 2.
The preparation method of battery is with embodiment one.
Embodiment eight:
Anode pole piece is made: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5Kg PVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on 50 micron thickness aluminium nets, through the oven dry roll extrusion, cut and make the anode pole piece that one side has the porous collector, 300 microns of pole piece gross thickness.
The preparation method of cathode pole piece is with embodiment 7.
The preparation method of battery is with embodiment one.
Embodiment nine:
Anode pole piece is made: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5Kg PVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on 50 micron thickness aluminium nets, baking is to half-dried, be covered with the layer of aluminum net in the one side that slurry is arranged again, through the oven dry roll extrusion, cut and make the anode pole piece that one side has the porous collector, 300 microns of pole piece gross thickness.
The preparation method of cathode pole piece is with embodiment 7.
The preparation method of battery is with embodiment one.
Embodiment ten:
Anode pole piece is made: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5Kg PVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 20 micron thickness aluminum substrates, baking is to half-dried, cover last layer 50 micron thickness aluminium nets again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length, cuts and makes the anode pole piece that one side has the porous collector, 300 microns of pole piece gross thickness through the oven dry roll extrusion less than 300 microns.
The preparation method of cathode pole piece is with embodiment 7.
The preparation method of battery is with embodiment one.
Embodiment 11:
Anode pole piece is made: 9.2Kg spinel lithium manganate and 0.3Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.5Kg PVDF (Kynoar) again mixes the formation slurry at normal temperatures, on evenly being coated at the bottom of the 50 micron thickness aluminium mesh liners, baking is to half-dried, cover last layer 20 micron thickness aluminium foils again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length, cuts and makes the anode pole piece that one side has the porous collector, 300 microns of pole piece gross thickness through the oven dry roll extrusion less than 300 microns.
The preparation method of cathode pole piece is with embodiment 7.
The preparation method of battery is with embodiment one.
Embodiment 12:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 10 micron thickness Copper Foil substrates, baking is to half-dried, face in addition at electrode covers last layer 50 micron thickness copper mesh again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length is less than 300 microns, and oven dry through roll extrusion, cuts and makes the anode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness.
The preparation method of anode pole piece is with embodiment 3.
The preparation method of battery is with embodiment one.
Embodiment 13:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 10 micron thickness Copper Foil substrates, baking is to half-dried, face in addition at electrode covers last layer 50 micron thickness copper mesh again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm2, the burr maximum length is less than 300 microns, oven dry, through roll extrusion, cut and make the anode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness.
The preparation method of anode pole piece is with embodiment four.
The preparation method of battery is with embodiment one.
Embodiment 14:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 10 micron thickness Copper Foil substrates, baking is to half-dried, face in addition at electrode covers last layer 50 micron thickness copper mesh again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length is less than 300 microns, and oven dry through roll extrusion, cuts and makes the anode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness.
The preparation method of anode pole piece is with embodiment five.
The preparation method of battery is with embodiment one.
Embodiment 15:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 10 micron thickness Copper Foil substrates, baking is to half-dried, face in addition at electrode covers last layer 50 micron thickness copper mesh again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length is less than 300 microns, and oven dry through roll extrusion, cuts and makes the anode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness.
The preparation method of anode pole piece is with embodiment six.
The preparation method of battery is with embodiment one.
Embodiment 16:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on 50 micron thickness copper mesh, baking is to half-dried, be covered with one deck copper mesh in the one side that slurry is arranged again, through the oven dry roll extrusion, cut and make the cathode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness.
The preparation method of anode pole piece is with embodiment four.
The preparation method of battery is with embodiment one.
Embodiment 17:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on 50 micron thickness copper mesh, baking is to half-dried, be covered with one deck copper mesh in the one side that slurry is arranged again, through the oven dry roll extrusion, cut and make the cathode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness.
The preparation method of anode pole piece is with embodiment five.
The preparation method of battery is with embodiment one.
Embodiment 18:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on 50 micron thickness copper mesh, baking is to half-dried, be covered with one deck copper mesh in the one side that slurry is arranged again, through the oven dry roll extrusion, cut and make the cathode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness.
The preparation method of anode pole piece is with embodiment six.
The preparation method of battery is with embodiment one.
Embodiment 19:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 10 micron thickness Copper Foil substrates, baking is to half-dried, cover last layer 50 micron thickness copper mesh again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length, cuts and makes the cathode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness through the oven dry roll extrusion less than 300 microns.
The preparation method of anode pole piece is with embodiment five.
The preparation method of battery is with embodiment one.
Embodiment 20:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 10 micron thickness Copper Foil substrates, baking is to half-dried, cover last layer 50 micron thickness copper mesh again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length, cuts and makes the cathode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness through the oven dry roll extrusion less than 300 microns.
The preparation method of anode pole piece is with embodiment six.
The preparation method of battery is with embodiment one.
Embodiment 21:
Cathode pole piece is made: 4.5Kg native graphite and 0.2Kg acetylene black are done in advance and are mixed, the N-methyl pyrrolidone solution that adds 0.3KgPVDF (Kynoar) again mixes the formation slurry at normal temperatures, evenly be coated on the 50 micron thickness copper mesh substrates, baking is to half-dried, cover last layer 10 micron thickness Copper Foils again, on metal forming, prick square hole with the needle plate mould, hole area 0.5mm
2, the burr maximum length, cuts and makes the cathode pole piece that one side has the porous collector, 200 microns of pole piece gross thickness through the oven dry roll extrusion less than 300 microns.
The preparation method of anode pole piece is with embodiment six.
The preparation method of battery is with embodiment one.
Claims (8)
1. non-aqueous solution electrochemical device polar plate, comprise electrode layer [5] and collector [4], collector [4] thickness is between 1～200 micron, described electrode layer contains electrochemical active material in [5], described electrode layer [5] is covered in a side surface of collector [4], be distributed with through hole [6] on the described collector [4], the area of each through hole [6] is smaller or equal to 10 square millimeters, it is characterized in that: the gross area of electrode layer coverage endoporus accounts for 10～90% of whole area coverage, described collector [4] is a perforated metal foil, thickness is 10～100 microns, electrode layer [5] thickness is 5～5000 microns, the through hole of described metal forming [6] edge is provided with burr to the electrode layer direction, and burr length is smaller or equal to the thickness of electrode layer [5].
2. pole piece according to claim 1 is characterized in that: described collector [4] is metal net shaped structure.
3. pole piece according to claim 1 is characterized in that: be provided with 2 layers of collector [4], described collector [4] lays respectively at two sides of electrode layer [5], is respectively equipped with described through hole [6] on each collector [4].
4. the manufacture method of a non-aqueous solution electrochemical device polar plate is characterized in that, comprises the following steps:
(1) preparation electrode layer material;
(2) described electrode layer material is compounded in a side surface of metal forming, and on metal forming, prick the hole, the area of each through hole is smaller or equal to 10 square millimeters, and the gross area of electrode layer coverage endoporus accounts for 10～95% of whole area coverage, makes metal forming form required collector;
(3) pole piece after compound is carried out hot pressing, electrode layer and collector are combined closely, obtain required pole piece.
5. manufacture method according to claim 5 is characterized in that: in the described step (2), electrode layer material employing slurry rubbing method and metal forming are compound, after compound finishing, do not have a side direction opposite side of covers electrode layer to prick the hole from metal forming.
6. manufacture method according to claim 5 is characterized in that: earlier described electrode layer material is prepared into the self-supporting electrode layer, carries out compound with metal forming again.
7. manufacture method according to claim 7 is characterized in that: the compound of described electrode layer and metal forming carries out simultaneously to prick the hole on metal forming.
8. manufacture method according to claim 5 is characterized in that: in described step (3) before, in the another side of electrode layer compound on second layer collector, described second layer collector is metal forming or a wire netting with holes.
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| CN111952539A (en) * | 2020-08-24 | 2020-11-17 | 上海空间电源研究所 | Preparation method of high-capacity electrode and metal lithium battery |
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| CN113903885A (en) * | 2021-09-30 | 2022-01-07 | 江苏天辉锂电池有限公司 | Three-dimensional microporous aluminum foil, lithium ion battery anode, lithium ion battery, preparation method of lithium ion battery anode and electric equipment |
| CN114864864A (en) * | 2022-03-04 | 2022-08-05 | 远景动力技术(江苏)有限公司 | Wire-clamping structure electrode, device for preparing wire-clamping structure electrode and application |
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Address after: 215153 Suzhou high tech Zone, Jiangsu city science and technology, Jinsha River Road, No. 181 Patentee after: Phylion battery Limited by Share Ltd Address before: Suzhou City, Jiangsu province 215011 Suzhou District No. 81 Xiangyang Road Patentee before: Suzhou Phylion Battery Co., Ltd. |