CN101800333A - Lithium ion battery capable of improving safety - Google Patents
Lithium ion battery capable of improving safety Download PDFInfo
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- CN101800333A CN101800333A CN201010162246A CN201010162246A CN101800333A CN 101800333 A CN101800333 A CN 101800333A CN 201010162246 A CN201010162246 A CN 201010162246A CN 201010162246 A CN201010162246 A CN 201010162246A CN 101800333 A CN101800333 A CN 101800333A
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- ion battery
- lithium ion
- lithium
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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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Abstract
The invention discloses a lithium ion battery capable of improving safety, comprising a positive electrode and a negative electrode, wherein the positive electrode comprises at least two positive materials, and the negative electrode of which the surface is coated with inorganic materials adopts a carbon material as a bottom layer. The invention discloses a lithium ion battery capable of improving safety and a preparation method thereof. The lithium ion battery is improved from electrode materials and electrode manufacturing processes, so that the safety of the battery can be improved; the lithium ion battery has favorable safety property in various property tests, is favorable for improving the market application prospect of the lithium ion battery and has the significant production practical meaning.
Description
Technical field
The present invention relates to battery manufacturing technology field, particularly relate to a kind of lithium ion battery that can improve fail safe.
Background technology
At present, advantages such as lithium ion battery has the specific energy height, recycles often, memory time is long, not only on portable electric appts, be used widely as mobile phone, Digital Video and laptop computer, and be widely used in big-and-middle-sized electrical equipment aspects such as electric automobile, electric bicycle and electric tool, therefore more and more higher to the safety requirements of lithium ion battery.
The positive and negative electrode electrode is the important component part of lithium ion battery, is the carrier that battery generation chemical energy and electric energy transform, and has not only determined the main chemical property of battery, and the design decision of positive and negative electrode electrode the fail safe of battery.
Existing anode material for lithium-ion batteries major part is a cobalt acid lithium material, adopts the cylindrical battery security performance of this manufacture of materials to accumulate experience from producing for many years, and its fail safe can not reach gratifying degree.
Summary of the invention
In view of this, the purpose of this invention is to provide and a kind ofly can improve lithium ion battery of fail safe and preparation method thereof, this lithium ion battery sets about improving from the angle and the electrode manufacturing process of electrode material, can improve the fail safe of battery, in various performance tests, has the excellent safety energy, help improving the market application foreground of lithium ion battery, be of great practical significance.
For this reason, the invention provides a kind of lithium ion battery that can improve fail safe, this battery includes anode electrode and negative electrode, includes at least two kinds of positive electrodes in the described anode electrode, and described negative electrode is that the employing material with carbon element is the electrode of bottom, surface coated organic and/or inorganic materials.
Wherein, described material with carbon element is native graphite or Delanium.
Wherein, the electrode made for the coating method that adopts layer-stepping of described negative electrode.
Wherein, the included positive electrode of described anode electrode is the lithium composite xoide of transition metal.
Wherein, the included positive electrode of described anode electrode is in cobalt acid lithium, LiMn2O4, nickel manganese cobalt composite material, LiFePO4, the lithium nickelate at least two kinds.
Wherein, the described anode electrode at least two kinds of positive electrodes of serving as reasons mix the mixture of formation or the electrode that adopts the coating method of layer-steppings to make by at least two kinds of positive electrodes mutually.
Wherein, the electrode of described anode electrode for adopting the coating method of layer-stepping to make by cobalt acid lithium, LiFePO4.
By above technical scheme provided by the invention as seen, compared with prior art, the invention provides and a kind ofly can improve lithium ion battery of fail safe and preparation method thereof, this lithium ion battery sets about improving from the angle and the electrode manufacturing process of electrode material, can improve the fail safe of battery, in various performance tests, have the excellent safety energy, help improving the market application foreground of lithium ion battery, be of great practical significance.
Description of drawings
Fig. 1 is the schematic diagram of layering (two-layer) formula electrode structure;
Fig. 2 is the schematic diagram of hybrid battery electrode structure (application pattern of two kinds of active materials)
Among the figure: 1 is collector, and 2 is first active material, and 3 is second active material;
Only be two kinds of active materials to be prepared electrode describe among the last figure, the various active structure of matter is according to this example.
Embodiment
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
The invention provides a kind of lithium ion battery that can improve fail safe, include anode electrode and negative electrode, include at least two kinds of positive electrodes in the described anode electrode, described positive electrode is the material that comprises active material, and the active material of described anode electrode for example can be LiFePO4, cobalt acid lithium;
In the present invention, the described anode electrode at least two kinds of positive electrodes of serving as reasons mix the mixture of formation or the electrode that adopts the coating method of layer-steppings to make by at least two kinds of positive electrodes mutually, like this, by different types of positive electrode is used simultaneously, both taken into account the chemical property of different positive electrodes, the fail safe of multiple positive electrode is complemented one another, thereby realize the fail safe maximization;
In the present invention, negative electrode described in the lithium ion battery of the present invention is to adopt material with carbon element (as native graphite or Delanium) that the electrode of other kind materials (as inorganic material) is arranged for bottom, surface coated, described negative electrode is specially the electrode that the coating method that adopts layer-stepping is made, and described negative electrode can improve fail safe with the mode of layering coating;
In the present invention, on the specific implementation, the included positive electrode of described anode electrode is the lithium composite xoide of transition metal; The positive electrode of described anode electrode is specifically as follows: adopt at least two kinds in the lithium composite xoide of all kinds of transition metal such as cobalt acid lithium, LiMn2O4, nickel manganese cobalt composite material, LiFePO4, lithium nickelate;
For the present invention, on the specific implementation, mix (LiFePO4 as 3% mixes with cobalt acid lithium) by the positive electrode that adopts two or more mutually according to different ratios and make electrode, the anode electrode fail safe with composite material that obtains promotes, perhaps use a kind of positive electrode to make electrode earlier, be coated with the coating of one or more layers other positive electrode then on the surface of this layer electrode material once more, form the electrode structure of layer-stepping.For example: use cobalt acid lithium material to make cobalt acid lithium electrode earlier, LiFePO 4 material being added into, materials such as conductive agent, binding agent, solvent are made into slurry together again, LiFePO4 slurry in the surperficial secondary coating of cobalt acid lithium electrode, obtain the anode electrode of layer-stepping after drying is handled, thereby improve the fail safe of anode electrode.
Fig. 1 is the schematic diagram of layering (two-layer) formula electrode structure, is coated with first active material 2 on the collector 1 of anode electrode, and secondary is coated with second active material 3 on ground floor active material 2; Fig. 2 is the schematic diagram of hybrid battery electrode structure (two kinds of application pattern of active material), is coated with the mixture that first active material 2 and second active material 3 are formed on the collector 1 of anode electrode, and second active material 3 is the stain among Fig. 2.
In the present invention, referring to Fig. 1, electrode structure at layer-stepping, can be two-layer or multilayer coated, according to designing requirement, the application pattern of using method such as blade coating, spraying, transfer printing, dip-coating or several different methods combination is coating ground floor material (as first active material 2 among the figure) earlier, through applying second layer material (as second active material 3 among the figure) again after the oven dry processing, multilayer coated electrode structure and the like.
In the present invention, referring to Fig. 2, at mixing coating, can be according to designing requirement, multiple positive electrode is mixed according to ratio process slurrying arbitrarily, use blade coating, spraying or other application pattern to be coated on the collector 1 then, by being made into anode electrode after the oven dry.
In sum, compared with prior art, provided by the inventionly a kind ofly can improve lithium ion battery of fail safe and preparation method thereof, this lithium ion battery sets about improving from the angle and the electrode manufacturing process of electrode material, can improve the fail safe of battery, in various performance tests, have the excellent safety energy, help improving the market application foreground of lithium ion battery, be of great practical significance.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. lithium ion battery that can improve fail safe, it is characterized in that, this battery includes anode electrode and negative electrode, includes at least two kinds of positive electrodes in the described anode electrode, and described negative electrode is that the employing material with carbon element is the electrode of bottom, surface coated organic and/or inorganic materials.
2. lithium ion battery as claimed in claim 1 is characterized in that, described material with carbon element is native graphite or Delanium.
3. lithium ion battery as claimed in claim 1 is characterized in that, the electrode that described negative electrode is made for the coating method that adopts layer-stepping.
4. lithium ion battery as claimed in claim 1 is characterized in that, the included positive electrode of described anode electrode is the lithium composite xoide of transition metal.
5. lithium ion battery as claimed in claim 4 is characterized in that, the included positive electrode of described anode electrode is at least two kinds in cobalt acid lithium, LiMn2O4, nickel manganese cobalt composite material, LiFePO4, the lithium nickelate.
6. as each described lithium ion battery in the claim 1 to 5, it is characterized in that the described anode electrode at least two kinds of positive electrodes of serving as reasons mix the mixture of formation or the electrode that adopts the coating method of layer-steppings to make by at least two kinds of positive electrodes mutually.
7. lithium ion battery as claimed in claim 6 is characterized in that, the electrode of described anode electrode for adopting the coating method of layer-stepping to make by cobalt acid lithium, LiFePO4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010162246A CN101800333A (en) | 2010-05-05 | 2010-05-05 | Lithium ion battery capable of improving safety |
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| CN201010162246A CN101800333A (en) | 2010-05-05 | 2010-05-05 | Lithium ion battery capable of improving safety |
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| CN101800333A true CN101800333A (en) | 2010-08-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102332558A (en) * | 2011-03-22 | 2012-01-25 | 东莞新能源科技有限公司 | Lithium ion battery and anode pole piece thereof |
| CN102412387A (en) * | 2010-09-26 | 2012-04-11 | 比亚迪股份有限公司 | Positive pole of lithium ion battery, and manufacturing method for positive pole, and lithium ion battery |
| CN105470496A (en) * | 2015-08-14 | 2016-04-06 | 万向A一二三系统有限公司 | Positive and negative plates for lithium-ion battery and battery employing positive and negative plates |
| CN105990598A (en) * | 2015-03-17 | 2016-10-05 | 株式会社杰士汤浅国际 | Energy storage device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1881660A (en) * | 2005-06-17 | 2006-12-20 | 董家琼 | Positive plate or negative plate with combination property for secondary lithium ion battery |
| CN101006595A (en) * | 2005-03-02 | 2007-07-25 | 松下电器产业株式会社 | Lithium ion secondary cell and manufacturlng method thereof |
| CN101202361A (en) * | 2007-04-24 | 2008-06-18 | 万向集团公司 | Lithium ion battery |
-
2010
- 2010-05-05 CN CN201010162246A patent/CN101800333A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101006595A (en) * | 2005-03-02 | 2007-07-25 | 松下电器产业株式会社 | Lithium ion secondary cell and manufacturlng method thereof |
| CN1881660A (en) * | 2005-06-17 | 2006-12-20 | 董家琼 | Positive plate or negative plate with combination property for secondary lithium ion battery |
| CN101202361A (en) * | 2007-04-24 | 2008-06-18 | 万向集团公司 | Lithium ion battery |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412387A (en) * | 2010-09-26 | 2012-04-11 | 比亚迪股份有限公司 | Positive pole of lithium ion battery, and manufacturing method for positive pole, and lithium ion battery |
| CN102332558A (en) * | 2011-03-22 | 2012-01-25 | 东莞新能源科技有限公司 | Lithium ion battery and anode pole piece thereof |
| CN105990598A (en) * | 2015-03-17 | 2016-10-05 | 株式会社杰士汤浅国际 | Energy storage device |
| CN105470496A (en) * | 2015-08-14 | 2016-04-06 | 万向A一二三系统有限公司 | Positive and negative plates for lithium-ion battery and battery employing positive and negative plates |
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Open date: 20100811 |