CN101404342A - Lithium iron battery - Google Patents
Lithium iron battery Download PDFInfo
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- CN101404342A CN101404342A CNA2008101765359A CN200810176535A CN101404342A CN 101404342 A CN101404342 A CN 101404342A CN A2008101765359 A CNA2008101765359 A CN A2008101765359A CN 200810176535 A CN200810176535 A CN 200810176535A CN 101404342 A CN101404342 A CN 101404342A
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- silicon dioxide
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- lithium carbonate
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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
Abstract
The invention discloses a lithium-iron battery; the positive pole filling comprises silicon dioxide with the grain diameter of 10nm-100mum and lithium carbonate or an additive combining the silicon dioxide and the lithium carbonate. The lithium-iron battery can avoid the phenomenon of high voltage when the battery begins to discharge, effectively reduces the phenomenon of battery expansion after the lithium battery discharges and improves the manufacturing and processing performance of the positive pole.
Description
Technical field
The present invention relates to a kind of lithium Fe battery.
Background technology
At present the variation of electronic apparatus, the update at full speed of miniaturization have impelled the progress of battery, require battery specific energy and specific power height, the life-span is long, price is suitable, easy to use.The develop rapidly of compact electric apparatus make small-sized civilian Battery Market not only quantitative requirement be multiplied, and require wide in variety, long, the capacity height of shelf-lifeing, volume little.To be that low and middle-grade primary cells account for leading for the situation of existing market, can not satisfy market electrical equipment heavy duty requirements of one's work far away.
The Li-FeS2 battery is to be cathode active material with FeS2, and Li is the lithium battery of anode active material.Operating voltage is 1.5V, is complementary with general electrical appliance, can directly replace standard water solution battery.The advantage of this battery is that specific energy is big, capacity is high, the storage time is long, with widely used alkaline zinc margunese, carbon zinc primary cell have interchangeability in the market, can be widely used in such as camera, MP3, hearing aids, video camera, Industrial PC Computer, computer RAM, cmos circuit memory Power Support, radio communication, various military communications radio station, medical equipment, hand-held communialtion equipment, instrument and meter such as timer, counter, and in the portable electrical appliance such as walkman.Because this battery extensively is present in commercial market and industrial market.Therefore development prospect is very huge.
The Li-FeS2 battery belongs to lithium battery series, and the key property of battery is as follows: (1) discharge voltage is high and more steady; (2) discharge capacity is big, and AA type battery is 2900mAh with the average discharge capacity that 200mA is discharged to 1.0V; (3) specific power height can heavy-current discharge, and AA type battery maximum can the continuous discharge of 2.0A discharging current; (4) in the battery of the same type product, weight is the lightest, and wherein the weight of AA type Li/FeS2 battery is about 14.5g; (5) operating temperature range broad ,-40 ℃～60 ℃, wherein cryogenic property is especially outstanding; (6) high-temperature shelf property is good, can store under 60 ℃ of temperature; (7) good preventing liquid leakage performance is arranged; (8) storage life is long, can store at normal temperatures 10 years; (9) battery does not have mercury, no cadmium, unleaded, compliance with environmental protection requirements.
Though this Li-FeS2 battery has above plurality of advantages, but because time of occurrence is short, also have and manyly can improve part, for example further improve the processing characteristics of its charge-discharge performance and positive plate, the problems that discharge initial stage voltage is high etc. are still an emphasis of this battery research work.
Summary of the invention
Technical problem to be solved by this invention provides a kind of lithium Fe battery, and this battery has the negative pressure height, the characteristics that discharge performance is good, and the adding of additive has simultaneously effectively solved high the asking of battery discharge initial voltage and has been.
For solving the problems of the technologies described above, technical scheme provided by the present invention is: a kind of lithium Fe battery, including particle diameter in the positive tassement polaire of this battery is the additive of silicon dioxide, lithium carbonate or its combination of 10nm～100 μ m.
Described additive particle diameter is 2～100 μ m.
Described additive is with the total weight of anode filler, and content is 0.01～5 weight %.
The advantage that the present invention has: manufacture method and the design feature of utilizing existing battery of lithium-iron disulphide, and in conjunction with silicon dioxide, lithium carbonate or its combination can improve its discharge initiation voltage, improve advantages such as anode processing characteristics, anodal with ferrous disulfide as active material, graphite powder and acetylene black are as conductive agent, PVDF is a binding agent, negative pole adopts lithium-aluminium alloy, electrolyte adopts non-aqueous system electrolyte, in anode, add the silicon dioxide of small particle diameter, lithium carbonate or its combination, small particle diameter has improved silicon dioxide, the contact rate on lithium carbonate or its combination and positive active material surface, thereby the chemical property of raising battery.The present invention can avoid battery to begin the high-tension phenomena that discharges and occur; Effectively reduced lithium battery discharge back cell expansion phenomenon; And improved anodal fabrication and processing performance.
Description of drawings:
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is the discharge characteristic curve of AA type battery, the discharging condition of battery: constant current 1000mA connects to be put, by voltage 0.6V; It is similar with the discharge curve that adds lithium carbonate wherein to add silicon dioxide, near overlapping.
Embodiment:
Battery of lithium-iron disulphide provided by the invention, anodal with ferrous disulfide as active material, graphite powder and acetylene black are as conductive agent, PVDF is a binding agent, negative pole adopts lithium-aluminium alloy, electrolyte adopts non-aqueous system electrolyte, and silicon dioxide, lithium carbonate or its combination of adding 0.01～5 weight % of anodal siccative total weight in anode are as additive.
The particle diameter of the silicon dioxide that is added, lithium carbonate or its combination in the scope of 10nm～100 μ m all can, but better in 2～100 mu m ranges; This particle diameter improves the contact rate on silicon dioxide, lithium carbonate or its combination and positive active material surface, thereby improves the chemical property of battery.
As follows with silicon dioxide, lithium carbonate or its anodal manufacture method that is combined as additive:
1, acetylene black, graphite and additive silicon dioxide or lithium carbonate are mixed according to its shared weight proportion in anodal siccative, wherein content of additive is 0.01～5 weight %, and ball milling 6 hours takes out 60 orders and sieves 2～3 times;
2, add ferrous disulfide according to the shared proportioning of ferrous disulfide in the anodal siccative, with this powder mechanical agitation 2～4 hours, take out afterwards and under nitrogen protection, carry out high-temperature process, 300～500 ℃ of temperature, temperature retention time 2～8 hours then;
3, the siccative after the heat treatment is crossed 60 mesh sieves 2～3 times;
4, add a certain amount of binding agent in siccative and pull an oar, the mechanical agitation some hrs until stirring, vacuumizes the bubble that degass afterwards, mixture is made the slurry of even thickness;
5, utilize coating machine that it is evenly coated on the aluminium foil according to certain thickness, dry then, operations such as roll-in, cut-parts, lug welding, making becomes column type coiled battery positive plate.
With the above-mentioned pole piece that the is made into divisional processing that dewaters, after the processing, reel immediately, groove, fluid injection, seal at last and make AA type battery.
Method of testing and result
The AA type battery of lithium-iron disulphide as above made after ageing, is carried out battery performance test.
Battery is opened pressure, negative pressure, internal resistance method of testing and is all adopted the conventionally test method: the voltmeter test battery open pressure, negative pressure, with the internal resistance of battery internal resistance test device test battery
Discharge test is discharged to 0.6V with 1000mA, and test is carried out under the 60%RH condition all at 20～22 ℃.Its discharge curve as shown in Figure 1, the discharge platform of AA type battery of lithium-iron disulphide that adds silicon dioxide, lithium carbonate is more than 1.4V, discharge capacity is about 3300mAh.The AA type battery of lithium-iron disulphide discharge platform that does not add additive relatively increases, and discharge capacity also increases to some extent.
Each embodiment shown in the table 1 demonstrates, and adds the influence of opening pressure and negative pressure of the silicon dioxide of different content to battery in the positive pole.Data from table 1 find out after having added silicon dioxide, the opening of battery be pressed with reduce negative pressure raise to some extent (load resistance is 3.9 Ω).Demonstrate battery of lithium-iron disulphide of the present invention and have the high characteristics of negative pressure.
Add of the influence of opening pressure and negative pressure of the silicon dioxide of different content in table 1 positive pole to battery
Each embodiment shown in the table 2 demonstrates, and adds the influence of opening pressure and negative pressure of the lithium carbonate of different content to battery in the positive pole.Data from table 2 find out after having added lithium carbonate, the opening of battery be pressed with reduce negative pressure raise to some extent (load resistance is 3.9 Ω).Show that battery of lithium-iron disulphide of the present invention has the high characteristics of negative pressure.
Add of the influence of opening pressure and negative pressure of the lithium carbonate of different content in table 2 positive pole to battery
Each embodiment in the table 3 has demonstrated the influence to cell discharge performance of the silicon dioxide that adds different content in the positive pole, lithium carbonate.Data from table are discharged at 1000mA under the discharge system of 0.6V as can be seen, have added in the positive pole after silicon dioxide, the lithium carbonate, and increase the discharge time of battery to some extent.Demonstrate battery of the present invention and have the good characteristics of discharge performance.
Add the influence of the silicon dioxide, lithium carbonate of different content in table 3 positive pole to cell discharge performance
The foregoing description shows that battery of the present invention has the negative pressure height, the characteristics that discharge performance is good, and the adding of additive has simultaneously effectively solved the high problem of battery discharge initial voltage.
Claims (3)
1, a kind of lithium Fe battery is characterized in that: including particle diameter in the positive tassement polaire of this battery is the additive of silicon dioxide, lithium carbonate or its combination of 10nm～100 μ m.
2, lithium Fe battery according to claim 1 is characterized in that: described additive particle diameter is 2～100 μ m.
3, lithium Fe battery according to claim 1 and 2 is characterized in that: described additive is with the total weight of anode filler, and content is 0.01～5 weight %.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101765359A CN101404342A (en) | 2008-11-17 | 2008-11-17 | Lithium iron battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101765359A CN101404342A (en) | 2008-11-17 | 2008-11-17 | Lithium iron battery |
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| CN101404342A true CN101404342A (en) | 2009-04-08 |
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| CNA2008101765359A Pending CN101404342A (en) | 2008-11-17 | 2008-11-17 | Lithium iron battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110856A (en) * | 2011-01-28 | 2011-06-29 | 福建南平南孚电池有限公司 | Capacity consuming method for Li-FeS2 battery |
| CN114497490A (en) * | 2022-01-14 | 2022-05-13 | 惠州市赛能电池有限公司 | Positive electrode slurry and preparation method thereof, electric core group and preparation method thereof, and lithium battery |
-
2008
- 2008-11-17 CN CNA2008101765359A patent/CN101404342A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110856A (en) * | 2011-01-28 | 2011-06-29 | 福建南平南孚电池有限公司 | Capacity consuming method for Li-FeS2 battery |
| CN102110856B (en) * | 2011-01-28 | 2013-01-09 | 福建南平南孚电池有限公司 | Capacity consuming method for Li-FeS2 battery |
| CN114497490A (en) * | 2022-01-14 | 2022-05-13 | 惠州市赛能电池有限公司 | Positive electrode slurry and preparation method thereof, electric core group and preparation method thereof, and lithium battery |
| CN114497490B (en) * | 2022-01-14 | 2024-03-26 | 惠州市赛能电池有限公司 | Positive electrode slurry and preparation method thereof, battery cell group and preparation method thereof, and lithium battery |
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Open date: 20090408 |