CN103579615A - Anode material of lithium battery and lithium battery using anode material - Google Patents
Anode material of lithium battery and lithium battery using anode material Download PDFInfo
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- CN103579615A CN103579615A CN201310362814.5A CN201310362814A CN103579615A CN 103579615 A CN103579615 A CN 103579615A CN 201310362814 A CN201310362814 A CN 201310362814A CN 103579615 A CN103579615 A CN 103579615A
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- lithium
- lithium battery
- anode material
- cobalt acid
- acid lithium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses an anode material of a lithium battery. The anode material of the lithium battery contains lithium cobalt oxide, wherein the grain diameter D50 of the lithium cobalt oxide is 2-16 microns; the specific surface area of the lithium cobalt oxide is 0.2m<2>/g-1.0m<2>/g. According to the anode material of the lithium battery, an inventor does a lot of researches on the grain diameter and the specific surface area of the lithium cobalt oxide; when the grain diameter and the specific surface area of the lithium cobalt oxide are finally found to be in the range, a path of embedding lithium ions is short, the resistance is small and the resistance of the battery is low and low-temperature discharging requirements of the lithium battery are met. Furthermore, the invention further discloses a lithium battery containing the anode material; the lithium battery adopts the anode material containing the lithium cobalt oxide with the small grain diameter so that the ion resistance is small and the lithium ions are easy to embed; therefore, the discharge capacity retention ratio of the lithium battery at the low temperature is improved effectively.
Description
Technical field
The present invention relates to a kind of positive electrode for battery material and use the battery of this positive electrode, especially a kind of anode for lithium battery material and use the lithium battery of this positive electrode.
Background technology
Lithium battery is the energy storage device that a kind of specific energy is high, has discharge voltage stable, and operating temperature range is wide, and self-discharge rate is low, and cycle charge-discharge, storage life are long, memory-less effect and the advantage such as nuisanceless.At present, along with the application of lithium ion battery is more and more extensive, different user is not identical to the requirement of lithium ion battery yet.In this field of low temperature lithium battery, more and more higher to the capacity requirement of low temperature discharge.
As the significant components that affects lithium battery performance, the effect of the positive active material of lithium battery is most important, and in lithium battery the inside, positive active material is as the positive pole of high potential, and providing can be for the effect that takes off the lithium ion of embedding.
In discharge process, lithium ion, from the de-embedding of negative pole, comes back to positive pole, and lithium ion can run into some resistances being embedded into anodal process, so reducing the resistance that lithium ion embeds is useful to low temperature discharge.
CN102325478A discloses a kind of lithium-ion battery system and improves the method for lithium battery low temperature performance, in this patent application document, although the particle diameter of the cobalt wherein adopting in anodal system acid lithium is less, but it only can reach capability retention when-20 ℃ of electric discharges and reach more than 85%, and its technique effect is to be realized by the acting in conjunction between anodal system, negative pole system and electrolyte three, therefore, the disclosed lithium battery of the document still cannot meet the capacity requirement to low temperature discharge.
Summary of the invention
The positive electrode that the object of the invention is to overcome the deficiencies in the prior art part and a kind of applicable lithium battery low temperature discharge is provided; Meanwhile, another object of the present invention is to provide a kind of lithium battery that contains described positive electrode.
For achieving the above object, the technical scheme that the present invention takes is: a kind of anode material of lithium battery, and described anode material of lithium battery comprises cobalt acid lithium, and the particle diameter D50 of described cobalt acid lithium is 2～16 μ m, and the specific area of described cobalt acid lithium is 0.2～1.0m
2/ g.
Particle diameter D50 and specific area are a kind of important indicators of cobalt acid lithium, and particle diameter is less, and the path that lithium ion embeds is short, and resistance is little, and the impedance of battery is low.But concerning cobalt acid lithium, particle diameter is not the smaller the better, and particle diameter is too little, and its compacted density is affected, and the energy density of battery is just low.Present inventor is by the large quantity research to cobalt acid lithium particle diameter and specific area, and final discovery, when the particle diameter of the sour lithium of cobalt and specific area are during in above-mentioned scope, can reach the low temperature discharge requirement of lithium battery.
As the preferred implementation of anode material of lithium battery of the present invention, the particle diameter D50 of described cobalt acid lithium is 2～10 μ m, and the specific area of described cobalt acid lithium is 0.4～1.0m
2/ g.
As the more preferably execution mode of anode material of lithium battery of the present invention, the particle diameter D50 of described cobalt acid lithium is 2～4 μ m, and the specific area of described cobalt acid lithium is 0.7～1.0m
2/ g.
As the more preferably execution mode of anode material of lithium battery of the present invention, the particle diameter D50 of described cobalt acid lithium is 3～4 μ m, and the specific area of described cobalt acid lithium is 0.7～0.8m
2/ g.
As the most preferred embodiment of anode material of lithium battery of the present invention, the particle diameter D50 of described cobalt acid lithium is 3 μ m, and the specific area of described cobalt acid lithium is 0.8m
2/ g.Present inventor in research process, unexpected discovery, when the particle diameter D50 of cobalt acid lithium is 3 μ m, and specific area is 0.8m
2during/g, under identical condition, in prepared lithium battery, in low temperature-40, ℃ discharge capacitance can promote 30% to lithium ion, and the low temperature discharge capability retention of lithium battery is had unexpectedly and significantly improved.
As the preferred implementation of anode material of lithium battery of the present invention, described anode material of lithium battery also comprises super conductive carbon black, polyvinylidene fluoride, 1-METHYLPYRROLIDONE.
As the preferred implementation of anode material of lithium battery of the present invention, the mass ratio of described cobalt acid lithium, super conductive carbon black and polyvinylidene fluoride is cobalt acid lithium: super conductive carbon black: polyvinylidene fluoride=95:3:2.
A preparation method for anode material of lithium battery as mentioned above, said method comprising the steps of:
(1) take respectively aequum cobalt acid lithium, super conductive carbon black, polyvinylidene fluoride and 1-METHYLPYRROLIDONE;
(2) successively the cobalt acid lithium taking, super conductive carbon black, polyvinylidene fluoride and 1-METHYLPYRROLIDONE are progressively joined in agitator tank and stirred, prepare slurry;
(3) slurry preparing is coated with, makes pole piece, obtain positive electrode.
, described lithium battery comprises as above arbitrary described positive electrode.Described lithium battery is owing to containing positive electrode described above, the particle diameter D50 that contains cobalt acid lithium in described positive electrode is less, the particle diameter D50 of cobalt acid lithium is the key factor that determines lithium ion impedance, present inventor is by a large amount of experimental studies and optimization, obtained being conducive to the performance data of the cobalt acid lithium of lithium battery low temperature discharge.The positive electrode that described lithium battery contains small particle diameter cobalt acid lithium due to employing, ionic resistance is little, is conducive to the embedding of lithium ion, and the discharge capacitance at low temperatures of described lithium battery is effectively improved.
Anode material of lithium battery of the present invention, wherein the particle diameter D50 of contained cobalt acid lithium is less, and the path that can make lithium ion embed is short, and resistance is little, makes the impedance of battery low.The lithium battery of the above-mentioned positive electrode of use of the present invention, because the particle diameter D50 of the cobalt acid lithium in positive electrode is wherein less, lithium ion is short in the path that is embedded into anodal process, resistance is little, be conducive to the embedding of lithium ion, the impedance of described lithium battery is low, thereby has significantly improved lithium battery discharge capacitance at low temperatures.
Embodiment
For the object, technical solutions and advantages of the present invention are better described, below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
Anode material of lithium battery described in the present embodiment, the particle diameter D50 of the cobalt wherein containing acid lithium is 16 μ m, the specific area of cobalt acid lithium is 0.2m
2/ g, the positive electrode of the present embodiment adopts following methods to be prepared from:
(1) prepare respectively a certain amount of cobalt acid lithium, super conductive carbon black (SP), polyvinylidene fluoride (PVDF), 1-METHYLPYRROLIDONE (NMP);
(2) according to cobalt acid lithium: the proportioning of super conductive carbon black, polyvinylidene fluoride=95:3:2 is weighed, then successively cobalt acid lithium, super conductive carbon black (SP), polyvinylidene fluoride (PVDF), 1-METHYLPYRROLIDONE (NMP) are progressively joined in agitator tank and stirred, prepare slurry;
(3) slurry preparing is coated with, makes pole piece, obtain the present embodiment anode material of lithium battery.
Embodiment 2
Described in the present embodiment in anode material of lithium battery, except the particle diameter D50 of the cobalt acid lithium that wherein contains is 12 μ m, the specific area of cobalt acid lithium is 0.4m
2/ g, all the other compositions and preparation method are identical with embodiment 1.
Embodiment 3
Described in the present embodiment in anode material of lithium battery, except the particle diameter D50 of the cobalt acid lithium that wherein contains is 10 μ m, the specific area of cobalt acid lithium is 0.4m
2/ g, all the other compositions and preparation method are identical with embodiment 1.
Embodiment 4
Described in the present embodiment in anode material of lithium battery, except the particle diameter D50 of the cobalt acid lithium that wherein contains is 8 μ m, the specific area of cobalt acid lithium is 0.5m
2/ g, all the other compositions and preparation method are identical with embodiment 1.
Embodiment 5
Described in the present embodiment in anode material of lithium battery, except the particle diameter D50 of the cobalt acid lithium that wherein contains is 5 μ m, the specific area of cobalt acid lithium is 0.6m
2/ g, all the other compositions and preparation method are identical with embodiment 1.
Embodiment 6
Described in the present embodiment in anode material of lithium battery, except the particle diameter D50 of the cobalt acid lithium that wherein contains is 4 μ m, the specific area of cobalt acid lithium is 0.7m
2/ g, all the other compositions and preparation method are identical with embodiment 1.
Embodiment 7
Described in the present embodiment in anode material of lithium battery, except the particle diameter D50 of the cobalt acid lithium that wherein contains is 3 μ m, the specific area of cobalt acid lithium is 0.8m
2/ g, all the other compositions and preparation method are identical with embodiment 1.
Embodiment 8
Described in the present embodiment in anode material of lithium battery, except the particle diameter D50 of the cobalt acid lithium that wherein contains is 2 μ m, the specific area of cobalt acid lithium is 1.0m
2/ g, all the other compositions and preparation method are identical with embodiment 1.
Embodiment 9
The impact of anode material of lithium battery of the present invention and lithium battery low temperature discharge capability retention
The present embodiment adopts the mode of control group and invention group, and wherein invention component is invention group 1-8, the anode material of lithium battery that invention group 1-8 adopts respectively embodiment 1-8 to prepare; The anode material of lithium battery that control group adopts is except the particle diameter of cobalt acid lithium is different from embodiment 1 with specific area, and all the other are all identical with embodiment 1, and in the anode material of lithium battery of control group employing, the particle diameter of the sour lithium of cobalt is 18 μ m, and specific area is 0.2m
2/ g.
Adopt respectively the anode material of lithium battery of invention group and control group, according to existing conventional process flow process, be made into battery core, respectively must invention group and the lithium battery for preparing of control group anode material of lithium battery.The lithium battery respectively invention group and control group being prepared, at identical temperature (40 ℃), the identical lower electric discharge of discharging current (200mAh) 5h, detects respectively the capability retention of invention group and control group after electric discharge, result is as shown in table 1.
The capability retention contrast table of table 1 invention group and control group
| Group | Cobalt acid lithium particle diameter | Cobalt acid lithium specific area | Capability retention after electric discharge |
| Control group | 18μm | 0.2m 2/g | 49% |
| Invention group 1 | 16μm | 0.2m 2/g | 64% |
| Invention group 2 | 12μm | 0.4m 2/g | 68% |
| Invention group 3 | 10μm | 0.4m 2/g | 72% |
| Invention group 4 | 8μm | 0.5m 2/g | 74% |
| Invention group 5 | 5μm | 0.6m 2/g | 76% |
| Invention group 6 | 4μm | 0.7m 2/g | 76% |
| Invention group 7 | 3μm | 0.8m 2/g | 89% |
| Invention group 8 | 2μm | 1.0m 2/g | 78% |
As seen from Table 1, under ℃ identical condition of lithium battery-40 that invention group prepares, after electric discharge, the lithium battery that its capability retention prepares with control group is compared, and is significantly improved.And invention is unexpected to be found, in anode material of lithium battery, cobalt acid lithium particle diameter is that 3 μ m, specific area are 0.8m
2/ g(invention group 7), time, after the lithium battery preparing discharges under-40 ℃ of identical conditions, its capability retention is compared and is increased significantly with other groups, up to 89%.Provable thus, anode material of lithium battery of the present invention, the cobalt acid lithium of employing small particle diameter, ionic resistance is little, is conducive to the embedding of lithium ion, thereby has effectively improved lithium battery discharge capacitance at low temperatures.
Last institute should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although the present invention is explained in detail with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.
Claims (9)
1. an anode material of lithium battery, is characterized in that, described anode material of lithium battery comprises cobalt acid lithium, and the particle diameter D50 of described cobalt acid lithium is 2～16 μ m, and the specific area of described cobalt acid lithium is 0.2～1.0m
2/ g.
2. anode material of lithium battery as claimed in claim 1, is characterized in that, the particle diameter D50 of described cobalt acid lithium is 2～10 μ m, and the specific area of described cobalt acid lithium is 0.4～1.0m
2/ g.
3. anode material of lithium battery as claimed in claim 2, is characterized in that, the particle diameter D50 of described cobalt acid lithium is 2～4 μ m, and the specific area of described cobalt acid lithium is 0.7～1.0m
2/ g.
4. anode material of lithium battery as claimed in claim 3, is characterized in that, the particle diameter D50 of described cobalt acid lithium is 3～4 μ m, and the specific area of described cobalt acid lithium is 0.7～0.8m
2/ g.
5. anode material of lithium battery as claimed in claim 4, is characterized in that, the particle diameter D50 of described cobalt acid lithium is 3 μ m, and the specific area of described cobalt acid lithium is 0.8m
2/ g.
6. anode material of lithium battery as claimed in claim 1, is characterized in that, described anode material of lithium battery also comprises super conductive carbon black, polyvinylidene fluoride, 1-METHYLPYRROLIDONE.
7. anode material of lithium battery as claimed in claim 6, is characterized in that, the mass ratio of described cobalt acid lithium, super conductive carbon black and polyvinylidene fluoride is cobalt acid lithium: super conductive carbon black: polyvinylidene fluoride=95:3:2.
8. a preparation method for anode material of lithium battery as described in claim 6 or 7, is characterized in that, said method comprising the steps of:
(1) take respectively aequum cobalt acid lithium, super conductive carbon black, polyvinylidene fluoride and 1-METHYLPYRROLIDONE;
(2) successively the cobalt acid lithium taking, super conductive carbon black, polyvinylidene fluoride and 1-METHYLPYRROLIDONE are progressively joined in agitator tank and stirred, prepare slurry;
(3) slurry preparing is coated with, makes pole piece, obtain positive electrode.
9. one kind containing just like the lithium battery of the arbitrary described positive electrode of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310362814.5A CN103579615A (en) | 2013-08-19 | 2013-08-19 | Anode material of lithium battery and lithium battery using anode material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310362814.5A CN103579615A (en) | 2013-08-19 | 2013-08-19 | Anode material of lithium battery and lithium battery using anode material |
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| CN103579615A true CN103579615A (en) | 2014-02-12 |
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| CN201310362814.5A Pending CN103579615A (en) | 2013-08-19 | 2013-08-19 | Anode material of lithium battery and lithium battery using anode material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466171B (en) * | 2014-12-13 | 2016-08-17 | 西安瑟福能源科技有限公司 | A kind of emergency starting lithium ion battery |
| CN109638212A (en) * | 2018-11-20 | 2019-04-16 | 东莞锂威能源科技有限公司 | A kind of high magnification fast charge lithium ion battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06243897A (en) * | 1992-12-24 | 1994-09-02 | Fuji Photo Film Co Ltd | Nonaqueous secondary battery |
| CN102315478A (en) * | 2010-06-29 | 2012-01-11 | 深圳市比克电池有限公司 | Lithium ion battery system and method for improving low-temperature discharge performance of lithium ion battery |
| CN102723462A (en) * | 2012-06-29 | 2012-10-10 | 上海锦众信息科技有限公司 | Manufacture method of anode of lithium ion secondary battery |
| CN103155238A (en) * | 2010-10-15 | 2013-06-12 | 丰田自动车株式会社 | Secondary battery |
-
2013
- 2013-08-19 CN CN201310362814.5A patent/CN103579615A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06243897A (en) * | 1992-12-24 | 1994-09-02 | Fuji Photo Film Co Ltd | Nonaqueous secondary battery |
| CN102315478A (en) * | 2010-06-29 | 2012-01-11 | 深圳市比克电池有限公司 | Lithium ion battery system and method for improving low-temperature discharge performance of lithium ion battery |
| CN103155238A (en) * | 2010-10-15 | 2013-06-12 | 丰田自动车株式会社 | Secondary battery |
| CN102723462A (en) * | 2012-06-29 | 2012-10-10 | 上海锦众信息科技有限公司 | Manufacture method of anode of lithium ion secondary battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466171B (en) * | 2014-12-13 | 2016-08-17 | 西安瑟福能源科技有限公司 | A kind of emergency starting lithium ion battery |
| CN109638212A (en) * | 2018-11-20 | 2019-04-16 | 东莞锂威能源科技有限公司 | A kind of high magnification fast charge lithium ion battery |
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Application publication date: 20140212 |