CN100369314C - Preparation method for high rate phosphate lithium ion battery and battery prepared thereby - Google Patents
Preparation method for high rate phosphate lithium ion battery and battery prepared thereby Download PDFInfo
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- CN100369314C CN100369314C CNB2005100877565A CN200510087756A CN100369314C CN 100369314 C CN100369314 C CN 100369314C CN B2005100877565 A CNB2005100877565 A CN B2005100877565A CN 200510087756 A CN200510087756 A CN 200510087756A CN 100369314 C CN100369314 C CN 100369314C
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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
Abstract
The present invention provides a high-rate phosphoric acid group lithium ion battery and a preparation method thereof. The preparation method of the high-rate phosphoric acid group lithium ion battery comprises the following steps: step 1, the preparation of a positive plate; step 2, the preparation of a negative plate; step 3, the preparation of the battery. Furthermore, the present invention adopts a phosphoric acid group lithium metallic compound and a proper quantity of dressing for the preparation of electrodes, the electrodes are processed by thinning treatment, and the positive and the negative plates are led out by a plurality of pole ears so as to improve the rate discharge performance and the low temperature performance of the battery. Because the phosphoric acid group lithium metallic compound has the advantages of low cost and weak oxidizing property, the battery prepared by the phosphoric acid group lithium metallic compound has the advantages of good cycle performance, low price and high use safety. In addition, the battery can be applied to intelligent chips, mobile phones, notebook computers, cameras, motor-assisted bicycles, electric automobiles, electric toys, etc., and is particularly suitable for the field of power batteries.
Description
Technical field
The present invention relates to a kind of preparation method of battery, relate in particular to a kind of preparation method of lithium ion battery, particularly a kind of preparation method of chargeable high magnification phosphate lithium ion battery.
Background technology
The lithium ion battery that mobile phone is used, positive active material are cobalt acid lithium, and this battery multiplying power discharging property and cryogenic property are good.Because cost height, the oxidizability of cobalt acid lithium are stronger, so battery price comparison safety in utilization expensive, battery is relatively poor.Phosphate lithium metal compounds costs such as LiFePO4 are low, oxidizability a little less than, so positive active material is that the price comparison of phosphate lithium metal compounds batteries such as LiFePO4 is low, safety in utilization is good.Because the conductivity of phosphate lithium metal compounds such as LiFePO4 is lower, makes the multiplying power discharging property of battery and cryogenic property relatively poor; While is low because of its density, granularity is little, and processing is difficulty; Make the application of the phosphate lithium metal compounds such as LiFePO4 of dynamic battery applications prospect be subjected to bigger restriction.
Summary of the invention
The purpose of this invention is to provide a kind of preparation method of high magnification phosphate lithium ion battery and the high magnification phosphate lithium ion battery of preparation thereof.Adopt the high magnification phosphate lithium ion battery of the present invention's preparation to improve the multiplying power discharging property and the cryogenic property of battery, thereby overcome the shortcoming that existing phosphate lithium ion battery exists.
The preparation method of high magnification phosphate lithium ion battery of the present invention, its step is as follows:
1. preparation positive plate
1) component of positive plate and desolventize beyond the percentage by weight of other component consist of:
Positive active material: one of LiFePO4, lithium manganese phosphate, LiNiPO or cobalt phosphate lithium 70-90%,
Conductive agent: one of acetylene black, carbon black or graphite or its combination in any 4-20%,
Adhesive: one of polytetrafluoroethylene or Kynoar 6-10%,
Solvent: one of N-methyl pyrrolidone or dimethylformamide or its combination in any, its weight are the 50-100% of the total weight of positive active material, conductive agent and adhesive, and preferred weight percent is 60-80%;
2) preparation anode sizing agent
Required positive active material, conductive agent are put into the ball mill mixing 1-3 hour, make positive mix; Required adhesive is put into mixer, add required solvent, heating and stirring are fully dissolved adhesive under 40-70 ℃ of temperature; Add above-mentioned positive mix then, stirred 1-3 hour, make anode sizing agent;
3) preparation positive plate
The above-mentioned anode sizing agent that has prepared is coated on aluminium foil with coating machine or aluminium is online, the thickness of coat is 75 μ m-300 μ m, and preferred thickness is 75 μ m-180 μ m; Dried 10-20 minute down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the coat of positive plate is 50-200 μ m, and preferred thickness is 50 μ m-120 μ m; Be cut into suitable dimensions on demand; Two or more lugs of welding in pole piece are from the long every lug and wide parallel with pole piece of equal length welding of crossing of the wide one side pole piece of pole piece;
2. preparation negative plate
1) component of negative plate and desolventize beyond the percentage by weight of other component consist of:
Negative material: one of graphite, needle coke or tin oxide or its combination in any 85-95%,
Conductive agent: graphite 2-10%,
Thickener: sodium carboxymethylcellulose (CMC) thickener 1.5-5%,
Adhesive: butadiene-styrene rubber (SBR) adhesive 1.5-5%,
Solvent: water, its weight are the 70-100% of the total weight of negative material, conductive agent, CMC thickener and SBR adhesive, and preferred weight percent is 75-95%;
2) preparation cathode size
Required negative material, conductive agent, CMC thickener, SBR adhesive are put into mixer, fully mix, add required solvent again, mix, make cathode size;
3) preparation negative plate
The above-mentioned cathode size that has prepared is coated on Copper Foil or the copper mesh with coating machine, and the thickness of coat is 45 μ m-240 μ m, and preferred thickness is 45 μ m-160 μ m; Dried 10-20 minute down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the coat of negative plate is 30-160 μ m, and preferred thickness is 30 μ m-105 μ m; Be cut into suitable dimensions on demand; Connecing two lugs along two wide side welds of pole piece;
3. preparation battery
Diaphragm material adopt PP (polypropylene) PE (polyethylene) PP composite membrane or PP the double-deck barrier film of PE; Electrolyte adopts organic electrolyte, and its solvent is one of DEC (diethyl carbonate), EMC (methyl ethyl carbonate), DMC (dimethyl carbonate), PC (propene carbonate), gamma-butyrolacton or its combination in any and EC (ethylene carbonate), and electrolyte is LiPF
6Or LiBF
4One of;
Is that the twice of negative pole length of a film, the diaphragm material of the wide wide 2mm of manying than negative plate are isolated with the above-mentioned a slice positive plate that has prepared and a slice negative plate with length, be wound into or be laminated into electric core, put into one of aluminum plastic film battery case, plastic battery box or metal battery box, inject electrolyte, back sealing of lid lid or heat-sealing; Through too small current activation, big current activation, obtain the finished product battery; Pack after the assay was approved; Test stone is as follows: cell voltage: greater than 3.3V, the internal resistance of cell: less than 60m Ω, battery capacity: greater than design capacity.
High power phosphate rate lithium ion battery of the present invention adopts phosphate lithium metallic composite to make electrode, this composite material comprises carbon-clad metal and metal-doped phosphate lithium composite material, can improve the multiplying power discharging property and the cryogenic property of phosphate lithium metal compounds, make its 3 multiplying power discharging capacity and 0.5 multiplying power multiplying power discharging Capacity Ratio (3C/0.5C) greater than 95%;-10 ℃ of discharge capacities compare greater than 75% with 20 ℃ of discharge capacities; Electrode is carried out slimming handle, make about the thin thickness to 100 micron of electrode, reduce the conduction stroke, increase conductive area, reduce internal resistance; Draw by positive/negative plate is carried out multipole ear, disperse current density, the raising electric conductivity of battery; Rational proportion electrode dressing has simultaneously further improved the multiplying power discharging property and the cryogenic property of battery.Because the cost of phosphate lithium metal compounds such as LiFePO4 is low, oxidizability a little less than, the battery price comparison is low, and safety in utilization is good, thereby has expanded its range of application and field.
Embodiment
High magnification phosphate lithium ion battery of the present invention, the multiplying power discharging property and the cryogenic property of battery have been improved, price comparison is low, expand the application of this battery, can be applicable to intelligent chip, mobile phone, notebook, video camera, electric bicycle, electric automobile, electronic toy etc.High magnification phosphate lithium ion battery of the present invention uses good cycle, safety in utilization good, cheap, is specially adapted to the electrokinetic cell field.
Embodiment 1
70 kilograms of LiFePO4s, 20 kilograms of acetylene blacks are put into ball mill mixed 1 hour, make positive mix; 10 kilograms of ptfe emulsions are put into mixer, add 50 kilograms of N-methyl pyrrolidones again, heating and stirring are fully dissolved polytetrafluoroethylene under 40 ℃ of temperature; Add above-mentioned positive mix then, stirred 1 hour, make anode sizing agent; Again anode sizing agent is coated on aluminium foil with coating machine, the thickness of coat is 200 μ m; Dried 10 minutes down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the positive plate coat is 125 μ m; Be cut into the positive plate of long 900mm, wide 40mm; Two lugs of welding in pole piece are from lug and wide parallel with pole piece of long per 1/3rd (300mm, the 600mm places) welding of the wide one side pole piece of pole piece;
90 kilograms of graphite, 5 kilograms of CMC thickeners, 5 kilograms of SBR adhesives are put into mixer, fully mix, add 70 kg of water again, mix, make cathode size; Again cathode size is coated on Copper Foil with coating machine, the thickness of coat is 160 μ m; Dried 10 minutes down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the coat of negative plate is 110 μ m; Be cut into the negative plate of long 950mm, wide 41mm, two side welds wide along pole piece connect two lugs;
Is that the twice of negative pole length of a film, the PP PE PP composite membrane of the wide wide 2mm of manying than negative plate are isolated with the above-mentioned a slice positive plate that has prepared and a slice negative plate with length, be wound into electric core, put into the aluminum plastic film battery case, the injection solvent is that mixed liquor, the electrolyte of EC, DEC is LiPF
6Electrolyte, lid lid back sealing; Through little current activation, big current activation, obtain the finished product battery; Pack after the assay was approved.
Embodiment 2
90 kilograms of LiNiPOs, 4 kilograms of carbon blacks are put into ball mill and mixed 3 hours, make positive mix; 6 kilograms of Kynoar are put into mixer, add 100 kilograms of N-methyl pyrrolidones again, heating and stirring are fully dissolved Kynoar under 70 ℃ of temperature; Add above-mentioned positive mix then, stirred 3 hours, make anode sizing agent; Again anode sizing agent is coated on aluminium foil with coating machine, the thickness of coat is 300 μ m; Dried 20 minutes down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the positive plate coat is 200 μ m; Be cut into the positive plate of long 300mm, wide 40mm; Two lugs of welding in pole piece are from lug and wide parallel with pole piece of long per 1/3rd welding of the wide one side pole piece of pole piece;
95 kilograms of needle cokes, 2 kilograms of graphite, 1.5 kilograms of CMC thickeners, 1.5 kilograms of SBR adhesives are put into mixer, fully mix, add 100 kg of water again, mix, make cathode size; Cathode size is coated on the Copper Foil with coating machine, the thickness of coat is 240 μ m again; Dried 20 minutes down at 100-130 ℃; Use roll forming machine roll compacting again, make the thickness 160 μ m of the coat of negative plate; Be cut into long 350mm,, the negative plate of wide 41mm, two side welds wide along pole piece connect two lugs;
Is that the twice of negative pole length of a film, the PP PE single-layer septum of the wide wide 2mm of manying than negative plate are isolated with the above-mentioned a slice positive plate that has prepared and a slice negative plate with length, be laminated into electric core, put into the plastic battery box, the injection solvent is that mixing material, the electrolyte of EC, DEC and PC is LiBF
4Electrolyte, cover post heat-seal; Through too small current activation, big current activation, obtain the finished product battery; Pack after the assay was approved.
Press embodiment 3
80 kilograms of LiFePO4s, 13 kilograms of graphite are put into ball mill and mixed 2 hours, make positive mix; 7 kilograms of Kynoar are put into mixer, add 60 kilograms of dimethylformamides again, heating and stirring are fully dissolved Kynoar under 60 ℃ of temperature; Add above-mentioned positive mix then, stirred 2 hours, make anode sizing agent; Again anode sizing agent is coated on aluminium foil with coating machine, the thickness of coat is 120 μ m; Dried 15 minutes down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the positive plate coat is 80 μ m; Be cut into the positive plate of the wide 40mm of long 700mm; Two lugs of welding in pole piece are from lug and wide parallel with pole piece of long per 1/3rd welding of the wide one side pole piece of pole piece;
60 kilograms of tin oxide, 33 kilograms of graphite, 4 kilograms of CMC thickeners, 3 kilograms of SBR adhesives are put into mixer, fully mix, add 75 kg of water again, mix, make cathode size; Again cathode size is coated on Copper Foil with coating machine, the thickness of coat is 75 μ m; Dried 13 minutes down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the coat of negative plate is 50 μ m; Be cut into the negative plate of long 750mm, wide 41mm, two side welds wide along pole piece connect two lugs;
Is that the twice of negative pole length of a film, the PP PE PP composite membrane of the wide wide 2mm of manying than negative plate are isolated with the above-mentioned a slice positive plate that has prepared and a slice negative plate with length, be wound into electric core, put into the metal battery box, the injection solvent is that mixed liquor, the electrolyte of EC, gamma-butyrolacton is LiPF
6Electrolyte, lid lid back sealing; Through too small current activation, big current activation, obtain the finished product battery; Pack after the assay was approved.
Embodiment 4
75 kilograms of lithium manganese phosphates, 10 kilograms of acetylene blacks, 5 kilograms of graphite are put into ball mill and mixed 1.5 hours, make positive mix; 10 kilograms of ptfe emulsions are put into mixer, add 30 kilograms of N-methyl pyrrolidones, 50 kilograms of dimethylformamides again, heating and stirring are fully dissolved polytetrafluoroethylene under 50 ℃ of temperature; Add above-mentioned positive mix then, stirred 1.5 hours, make anode sizing agent; Again anode sizing agent is coated on the aluminium net with coating machine, the thickness of coat is 75 μ m; Dried 13 minutes down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the positive plate coat is 50 μ m; Be cut into the positive plate of long 450mm, wide 40mm; Two lugs of welding in pole piece, two lugs of welding in pole piece are from lug and wide parallel with pole piece of long per 1/3rd welding of the wide one side pole piece of pole piece;
95 kilograms of graphite, 2 kilograms of CMC thickeners, 3 kilograms of SBR adhesives are put into mixer, fully mix, add 95 kg of water again, mix, make cathode size; Cathode size is coated on the copper mesh with coating machine, the thickness of coat is 45 μ m again; Dried 15 minutes down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the coat of negative plate is 30 μ m; Be cut into the negative plate of long 500mm, wide 41mm, two side welds wide along pole piece connect two lugs;
Is that the twice of negative pole length of a film, the PP PE PP composite membrane of the wide wide 2mm of manying than negative plate are isolated with the above-mentioned a slice positive plate that has prepared and a slice negative plate with length, be wound into electric core, put into the aluminum plastic film battery case, the injection solvent is DMC, EMC, EC mixed liquor, and electrolyte is LiPF
6Electrolyte, lid lid back sealing; Through too small current activation, big current activation, obtain the finished product battery; Pack after the assay was approved.
Embodiment 5
With 81 kilograms of cobalt phosphate lithiums, 3 kilograms of acetylene blacks, 4 kilograms of graphite, 3 kilograms of carbon blacks, put into ball mill and mixed 2.5 hours, make positive mix; 9 kilograms of Kynoar are put into mixer put into mixer, in add 40 kilograms of N-methyl pyrrolidones, 44 kilograms of dimethylformamides again, heating and stir under 58 ℃ of temperature adds Kynoar again and fully dissolves; Add above-mentioned positive mix then, stirred 2.5 hours, make anode sizing agent; Again anode sizing agent is coated on aluminium foil with coating machine, the thickness of coat is 180 μ m; Dried 18 minutes down at 100-130 ℃; Use roll forming machine roll compacting again, make the thickness 120 μ m of positive plate coat; Be cut into the positive plate of long 500mm, wide 40mm; 4 lugs of welding in pole piece are from lug and wide parallel with pole piece of long per 1/5th welding of the wide one side pole piece of pole piece;
34 kilograms of graphite, 40 kilograms of needle cokes, 21 kilograms of tin oxide, 3 kilograms of CMC thickeners, 2 kilograms of SBR adhesives are put into mixer, fully mix, add 90 kg of water again, mix, make cathode size; Cathode size is coated on the Copper Foil with coating machine, the thickness of coat is 160 μ m again; Dried 10 minutes down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the coat of negative plate is 105 μ m; Be cut into the negative plate of long 550mm, wide 41mm, two side welds wide along pole piece connect two lugs;
Is that the twice of negative pole length of a film, the PP PE PP composite membrane of the wide wide 2mm of manying than negative plate are isolated with the above-mentioned a slice positive plate that has prepared and a slice negative plate with length, be laminated into electric core, put into the aluminum plastic film battery case, the injection solvent is the mixing material of EC, DEC, EMC, DMC and gamma-butyrolacton, and electrolyte is LiPF
6Electrolyte, lid lid back sealing; Through too small current activation, big current activation, obtain the finished product battery; Pack after the assay was approved.
Claims (4)
1. the preparation method of a phosphate lithium ion battery, its step is as follows:
1) preparation positive plate
(1) component of positive plate and desolventize beyond the percentage by weight of other component consist of:
Positive active material: one of LiFePO4, lithium manganese phosphate, LiNiPO or cobalt phosphate lithium 70-90%,
Conductive agent: one of acetylene black, carbon black or graphite or its combination in any 4-20%,
Adhesive: one of polytetrafluoroethylene or Kynoar 6-10%,
Solvent: one of N-methyl pyrrolidone, dimethylformamide or its combination in any, its weight are the 50-100% of the total weight of positive active material, conductive agent and adhesive;
(2) preparation anode sizing agent
Required positive active material, conductive agent are put into the ball mill mixing 1-3 hour, make positive mix; Required adhesive is put into mixer, add required solvent, heating and stirring are fully dissolved adhesive under 40-70 ℃ temperature; Add above-mentioned positive mix then, stirred 1-3 hour, make anode sizing agent;
(3) preparation positive plate
The above-mentioned anode sizing agent that has prepared is coated on aluminium foil with coating machine or aluminium is online, the thickness of coat is 75 μ m-300 μ m; Dried 10-20 minute down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the coat of positive plate is 50-200 μ m; Be cut into suitable dimensions on demand; Two or more lugs of welding in pole piece are from the long every lug and wide parallel with pole piece of equal length welding of crossing of the wide one side pole piece of pole piece;
2) preparation negative plate
(1) component of negative plate and desolventize beyond the percentage by weight of other component consist of:
Negative material: one of graphite, needle coke, tin oxide or its combination in any 85-95%,
Conductive agent: graphite 2-10%,
Thickener: sodium carboxymethylcellulose (CMC) thickener 1.5-5%,
Adhesive: butadiene-styrene rubber (SBR) mixture 1.5-5%,
Solvent: water, its weight are the total weight of negative material, conductive agent, CMC thickener and SBR adhesive
70-100％；
(2) preparation cathode size
Required negative material, conductive agent, CMC thickener, SBR adhesive are put into mixer, fully mix, add required solvent again, mix, make cathode size;
(3) preparation negative plate
The above-mentioned cathode size that has prepared is coated on Copper Foil or the copper mesh with coating machine, and the thickness of coat is 45 μ m-240 μ m; Dried 10-20 minute down at 100-130 ℃; Use roll forming machine roll compacting again, the thickness that makes the coat of negative plate is 30-160 μ m; Be cut into suitable dimensions on demand; Two side welds wide along pole piece connect two lugs;
3) preparation battery
Diaphragm material adopt PP PE PP composite membrane or PP the double-deck barrier film of PE; Electrolyte adopts organic electrolyte, and its solvent is one of DEC, EMC, DMC, PC, gamma-butyrolacton or its combination in any and EC, and electrolyte is LiPF
6Or LiBF
4One of;
Is that the twice of negative pole length of a film, the diaphragm material of the wide wide 2mm of manying than negative plate are isolated with the above-mentioned a slice positive plate that has prepared and a slice negative plate with length, be wound into or be laminated into electric core, put into one of aluminum plastic film battery case, plastic battery box or metal battery box, inject electrolyte, back sealing of lid lid or heat-sealing, through too small current activation, big current activation, obtain the finished product battery, after the assay was approved packing; Test stone is as follows: cell voltage: greater than 3.3V, the internal resistance of cell: less than 60m Ω, battery capacity: greater than design capacity.
2. the preparation method of phosphate lithium ion battery according to claim 1 is characterized in that wherein in the first step, the weight of solvent is the 60-80% of the total weight of positive active material, conductive agent and adhesive; Wherein in second step, the weight of solvent is the 75-95% of the total weight of negative material, conductive agent, thickener and adhesive.
3. the preparation method as phosphate lithium ion battery as described in the claim 2 is characterized in that wherein the thickness of the coat of positive plate is 75 μ m-180 μ m in the first step; After roll forming machine roll compacting, the thickness of the coat of positive plate is 50-120 μ m; The thickness of the coat of negative plate is 45 μ m-160 μ m in second step; After roll forming machine roll compacting, the thickness that makes the coat of negative plate is 30-105 μ m.
4. phosphate lithium ion battery as one of the preparation method of phosphate lithium ion battery as described in claim 1-3 preparation, it is characterized in that, the component of the positive plate of electricity core and desolventize beyond the percentage by weight of other component consist of: positive active material: LiFePO4, lithium manganese phosphate, one of LiNiPO or cobalt phosphate lithium 70-90%, conductive agent: acetylene black, one of carbon black or graphite or its combination in any 4-20%, adhesive: one of polytetrafluoroethylene or Kynoar 6-10%, solvent: N-methyl pyrrolidone, one of dimethylformamide or its combination in any, its weight are positive active material, the 50-100% of the total weight of conductive agent and adhesive; The component of the negative plate of electricity core and desolventize beyond the percentage by weight of other component consist of: negative material: one of graphite, needle coke, tin oxide or its combination in any 85-95%, conductive agent: graphite 2-10%, thickener: sodium carboxymethylcellulose (CMC) thickener 1.5-5%, adhesive: butadiene-styrene rubber (SBR) adhesive 1.5-5%, solvent: water, its weight are the 70-100% of the total weight of negative material, conductive agent, CMC thickener and SBR adhesive.
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| WO2004045007A2 (en) * | 2002-11-13 | 2004-05-27 | HYDRO-QUéBEC | Electrode coated with a film obtained from an aqueous solution comprising a water-soluble binder, production method thereof and uses of same |
| CN1551385A (en) * | 2003-05-09 | 2004-12-01 | ������������ʽ���� | Positive electrode for lithium secondary cell and lithium secondary cell |
| CN1585169A (en) * | 2004-05-21 | 2005-02-23 | 河南金龙精密铜管股份有限公司 | 3V chargeable lithium ino battery and its production |
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