CN101938007A - Lithium ion secondary battery - Google Patents
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- CN101938007A CN101938007A CN2010102619408A CN201010261940A CN101938007A CN 101938007 A CN101938007 A CN 101938007A CN 2010102619408 A CN2010102619408 A CN 2010102619408A CN 201010261940 A CN201010261940 A CN 201010261940A CN 101938007 A CN101938007 A CN 101938007A
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Abstract
The invention discloses a lithium ion secondary battery which comprises a positive plate, a negative plate, an isolating membrane arranged between the positive plate and the negative plate and an electrolyte, wherein the positive plate comprises a positive current collector and positive active substances distributed on the positive current collector; the negative plate comprises a negative current collector and negative active substances distributed on the negative current collector. The positive active substances comprise an transition metal oxide Li<1+x>Mn<1-x-y-z>Ni<y>Ml<z>O2, wherein Ml is Co, Ti, Fe, Zr, Cu, Al, Mg, Zn, Sn Ca or V, x is greater than 0 and smaller than 0.3, y is greater than 0.1 and smaller than 0.6, and z is greater than 0 and smaller than 0.2. The positive active substances of the lithium ion secondary battery comprise Li<1+x>Mn<1-x-y-z>Ni<y>Ml<z>O2 and have good storage performance and overdischarge resistance.
Description
Technical field
The invention belongs to field of lithium ion secondary, relate in particular to and a kind ofly have good resistance and cross the lithium rechargeable battery of putting performance and storge quality.
Background technology
Along with modern society and science and technology development, the application of mobile devices such as video camera, notebook computer, mobile DVD and digital camera more and more widely, and is also increasing to the demand of high-energy battery.Lithium rechargeable battery has advantages such as energy density is high and in light weight as a kind of green high-capacity battery, therefore is widely used in the various mobile devices.
Lithium rechargeable battery generally comprises: positive plate, negative plate, be interval in the barrier film between positive plate and the negative plate, and electrolyte, positive plate comprises plus plate current-collecting body and is distributed in and contain the lithium positive active material on the plus plate current-collecting body, and negative plate comprises negative current collector and is distributed in the negative electrode active material that can take off/insert on the negative current collector.
At present, the application of lithium rechargeable battery just transforms to how electric core string and direction from single electric core, and the application of battery pack is just becoming the main flow that lithium rechargeable battery is used, and for example: in notebook computer, lithium rechargeable battery generally adopts 3 string 2 and modes; In electric tool, lithium rechargeable battery generally adopts 3 string or 5 string modes; And in electric automobile, the string of lithium rechargeable battery is also more important.
The discharge curve of lithium rechargeable battery end (3.0V is following) is very precipitous, common lithium rechargeable battery has only 2～3% of cell integrated capacity at the capacity of 2.0V-3.0V, therefore, in the series connected battery group, even the battery that capacity is very approaching, also very big pressure reduction may appear in that discharge is terminal, this phenomenon be called electric core do not match (Cell im-balance, CIM).The CIM phenomenon can be along with the decay of capacity in the cyclic process and the inconsistent increase of battery capacity and more and more serious, and different batteries are at the terminal pressure reduction of discharge even can reach more than the 1.0V.Such voltage tends to cause electric core to be judged to be unbalance and permanent failure by discharge protection circuit; and do not having under the situation of the protection of putting since the difference of capacity and terminal discharge curve cause easily too suddenly capacity attenuation faster battery crossed and be put into lower current potential.Even more serious is, this not matching can make that some battery is crossed in the battery pack and be put into below the 0.5V that the negative pole current potential rises to 3.45V (vs Li
+/ Li), causing the dissolving of copper collector, the copper that dissolves in charging process is separated out on negative pole, makes that battery capacity capable of circulation sharply reduces, decay rapidly.
In order to overcome the CIM problem of lithium ion secondary batteries in series connection, (Cell under voltage, protection CUV) are put into below the 2.5V to prevent that single battery from being crossed by current potential often to need to add an electric core discharge of list.But on the one hand, the existence of CUV protection module has not only increased the size and the weight of battery pack, has also increased the cost of battery pack simultaneously.On the other hand; because the mistake of most of battery is put the protection operated by rotary motion at 3.0-2.5V; this cross put the protection voltage under; the difference of leakage current is very big, even reaches three orders of magnitude (in notebook computer, more than the 3.0V; owing to need monitoring voltage; leakage current is generally 0.5mA, and below 3.0V, leakage current is reduced to 0.2 μ A).Because battery at the following capacity of 3.0V (or 2.5V) very little, is in the battery of discharge condition or battery pack and tends to be easy to crossed in the process that stores and put and analyse the copper inefficacy.
Proposed the multiple technologies scheme in the prior art, to improve the super-charge super-discharge performance of lithium rechargeable battery, the U.S. Pat 5,882,218 of bulletin passed through to add Li as on March 16th, 1999
xMn
2O
4The mode mistake of improving lithium rechargeable battery put performance.But, Li
xMn
2O
4Unstable on thermodynamics, be difficult to add, can't satisfy actual instructions for use.And for example, in 5,278,000 of the U.S. Pat of on January 11st, 1994 bulletin by add two cathode additives (one higher slightly than cathode potential, one lower slightly than cathode potential, as Li
2Mn
2O
4And Li
0.1MoO
2) method improve overcharging of lithium rechargeable battery and cross and put performance.But it is still undesirable that the storge quality of lithium rechargeable battery and resisting is put performance.
In view of this, necessaryly provide a kind of and have good storge quality and resisted the lithium rechargeable battery of putting performance.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and have good storge quality and resisted the lithium rechargeable battery of putting performance.
In order to solve the problems of the technologies described above, the invention provides a kind of lithium rechargeable battery, it comprises: positive plate, negative plate, be interval in the barrier film between positive plate and the negative plate, and electrolyte, positive plate comprises plus plate current-collecting body and the positive active material that is distributed on the plus plate current-collecting body, negative plate comprises negative current collector and the negative electrode active material that is distributed on the negative current collector, contains transition metal oxide Li in the positive active material
1+xNi
1-x-y-zMn
yMl
zO
2, wherein, M1 is Co, Ti, Fe, Zr, Cu, Al, Mg, Zn, Sn, Ca or V, 0＜x＜0.3,0.1＜y＜0.6,0＜z＜0.2.
As a kind of improvement of lithium rechargeable battery of the present invention, described positive active material also contains Li
zCo
1-(x+y)Ni
xMn
yO
2, LiCoO
2, LiNiO
2, LiCo
2xNi
1-2xO
2, LiVPO
4, Li
2MnO
3, LiMn
2-xM2
xO
4In one or more, wherein, 0＜x, y＜0.5,1＜z＜1.2, M2 is one or more among Li, Al, Mg, Zn, Cr, La, Nd, Ti, Sn, the V.
As a kind of improvement of lithium rechargeable battery of the present invention, described positive active material transition metal oxide Li
1+xNi
1-x-y-zMn
yMl
zO
2Weight ratio in mixed cathode active material is 10% to 95%.
As a kind of improvement of lithium rechargeable battery of the present invention, described lithium rechargeable battery has capacity in voltage range 3.0-4.2V, also has voltage platform and part capacity below voltage range 2.0-2.5V.
As a kind of improvement of lithium rechargeable battery of the present invention, described negative electrode active material is selected from graphite, hard carbon, Li
4Ti
5O
12, metal nitrogen or phosphide, Sn, Si or its combination.
As a kind of improvement of lithium rechargeable battery of the present invention, described electrolyte comes from the organic solvent system that electrolytic salt is dissolved in organic solvent or has polymeric system to support.
A kind of improvement as lithium rechargeable battery of the present invention, described organic solvent is selected from propylene carbonate, vinyl carbonate, 1,2-dimethoxy-ethane, 1,2-diethoxyethane, diethyl carbonate, dimethyl carbonate, gamma-butyrolacton, oxolane, diethyl ethyl phosphonate, sulfoxide, methyl sulfoxide, dioxolane, acetonitrile or its combination.
As a kind of improvement of lithium rechargeable battery of the present invention, described electrolytic salt is selected from LiClO
4, LiAsF
6, LiPF
6, LiBF
4, LiB (C
6H
5)
4, LiCl, LiBr, CH
3SO
3Li, LiBOB, CF
3SO
3Li or its combination.
As a kind of improvement of lithium rechargeable battery of the present invention, described positive plate, barrier film and negative plate are made circle or rectangular cell by winding method, perhaps make rectangular cell by the lamination mode.
A kind of improvement as lithium rechargeable battery of the present invention, described barrier film is polypropylene barrier film, polyethylene barrier film, or polypropylene and polyethylene composite high-molecular barrier film, or the polymer gel attitude barrier film that forms of polyvinylidene fluoride, vinylidene difluoride-hexafluoropropylene copolymer, polymethyl methacrylate, polyethylene glycol, or the composite isolated film of aforementioned composite high-molecular barrier film and aforementioned polymer gel state barrier film.
Relative prior art, lithium rechargeable battery of the present invention has the following advantages at least: positive active material Li
1+xNi
1-x-y-zMn
yMl
zO
2The adding anti-mistake that can improve single electric core put performance.In addition, the existence of electronegative potential platform capacity has increased electric core at self capacity below current potential, can increase the storage time of electric core, prevents that effectively electric core was put into electronegative potential excessively and caused the dissolving of copper collector.
Description of drawings
Below in conjunction with specification drawings and specific embodiments, lithium rechargeable battery of the present invention and useful technique effect thereof are elaborated, wherein:
Fig. 1 is transition metal oxide Li
1+xNi
1-x-y-zMn
yMl
zO
2The X ray collection of illustrative plates.
Fig. 2 is the winding-structure schematic diagram of the electric core of lithium rechargeable battery of the present invention.
Fig. 3 is the deep discharge curve comparison diagram of comparative example lithium rechargeable battery and the embodiment of the invention 1 lithium rechargeable battery.
Fig. 4 is the 5 string battery pack that the comparative example lithium rechargeable battery becomes with the embodiment of the invention 1,2 lithium ion secondary batteries; at normal temperature with do not have under the condition of single electric core overdischarging protector, the life-span comparison diagram that between 17.5V～21V, circulates with 0.7C charging, 10C discharge.
Fig. 5 is the 5 string battery pack that the comparative example lithium rechargeable battery becomes with the embodiment of the invention 1,2 lithium ion secondary batteries; at normal temperature with do not have under the condition of single electric core overdischarging protector, with 0.7C charging, the maximum voltage difference comparison diagram of 10C discharge between the discharge end cell that circulates between 17.5V～21V.
Embodiment
For the anti-mistake of improving lithium rechargeable battery is put performance and storge quality, the invention provides a kind of lithium rechargeable battery, it comprises: positive plate, negative plate, be interval in the barrier film between positive plate and the negative plate, and electrolyte, positive plate comprises plus plate current-collecting body and the positive active material that is distributed on the plus plate current-collecting body, negative plate comprises negative current collector and the negative electrode active material that is distributed on the negative current collector, and positive active material contains transition metal oxide Li
1+xNi
1-x-y-zMn
yMl
zO
2, wherein, M1 is Co, Ti, Fe, Zr, Cu, Al, Mg, Zn, Sn, Ca or V, 0＜x＜0.3,0.1＜y＜0.6,0＜z＜0.2.
Lithium rechargeable battery of the present invention has two voltage platforms between 2.0V～4.2V; the platform that is positioned at 3.0～4.2V is used for regular picture; the voltage platform that is arranged in 2.0～3.0V then can be used as the buffer platform of discharge process; do not having under the situation of overdischarging protector, the existence of the voltage platform of 2.0～3.0V can effectively be protected battery not crossed and be put into below the 2.0V.Therefore; 2.0 the existence of～3.0V voltage platform and capacity can prevent effectively that battery pack is owing to the mistake that capacity volume variance causes is put; not only can simplify the cost of putting protection, reducing protective circuit; and can prolong the memory time of battery under discharge condition, prevent that battery from being crossed the oxidizing potential that is put into the copper collector.
Preferably, the positive active material of lithium rechargeable battery of the present invention also contains LiCoO
2, LiNiO
2, Li
zCo
1-(x+y)Ni
xMn
yO
2, LiCo
2xNi
1-2xO
2, LiVPO
4, Li
2MnO
3, LiMn
2-xM2
xO
4In one or more, wherein, 0＜x, y＜0.5,1＜z＜1.2, M2 is one or more among Li, Al, Mg, Zn, Cr, La, Nd, Ti, Sn, the V.
Preferably, the negative electrode active material of lithium rechargeable battery of the present invention is selected from graphite, hard carbon, metal nitride, Li
4Ti
5O
12, Sn, Si or its combination.Comparative example
The preparation of positive plate: with LiMn2O4 (LiMn
2O
4), conductive carbon black (Super-P), polyvinylidene fluoride (PVDF) be by weight 93: 3: 4 and N, N-dimethyl pyrrolidone (NMP) mixes, stirring obtains anode sizing agent, can regulate viscosity by NMP in the whipping process; Then, anode sizing agent is uniformly coated on the two sides of the thick plus plate current-collecting body aluminium foil of 16 μ m, and makes positive plate through colding pressing, cutting apart according to needed size.
The preparation of negative plate: with mesophase pitch based carbon microsphere (anode graphite a kind of, MCMB), conductive carbon black (Super-p), sodium carboxymethylcellulose (binding agent, CMC), butadiene-styrene rubber (Styrene ButadieneRubber, SBR) by weight 94: 1: 2: 3 mix with deionized water, stirring obtains cathode size, can regulate viscosity by deionized water in the whipping process; Then, cathode size is uniformly coated on the two sides of the thick negative current collector Copper Foil of 9 μ m, makes negative plate through colding pressing, cutting apart.
The preparation of lithium rechargeable battery: will be wound into electric core according to positive plate, negative plate and three layers of composite isolated film of PP/PE/PP of aforementioned prepared; LiPF through terminal welding, packaging foil encapsulation, injection 1mol/l
6/ (EC+DEC+PC) electrolyte, encapsulation change into and the moulding of bleeding after make the comparative example lithium rechargeable battery.Wherein, the volume ratio of ethylene carbonate (EC), diethyl carbonate (DEC), propene carbonate (PC) is 1: 1: 1.
With the electric core in the comparative example at normal temperatures with the multiplying power deep discharge of 0.1C to 0.0V, test result is as shown in Figure 3.Embodiment 1
The preparation of positive plate: with 70wt%LiMn
2O
4And 30wt%Li
1.05Ni
0.45Mn
0.45Co
0.05O
2, conductive carbon black (Super-P), polyvinylidene fluoride (PVDF) be by weight 93: 3: 4 and N, N-dimethyl pyrrolidone (NMP) mixes, stirring obtains anode sizing agent, can regulate viscosity by NMP in the whipping process, transition metal oxide Li
1.05Ni
0.45Mn
0.45Co
0.05O
2The X ray collection of illustrative plates as shown in Figure 1, it is a layer structure; Then, anode sizing agent is uniformly coated on the two sides of the thick plus plate current-collecting body aluminium foil of 16 μ m, and makes positive plate through colding pressing, cutting apart according to needed size.
The preparation of negative plate: with mesophase pitch based carbon microsphere (anode graphite a kind of, MCMB), conductive carbon black (Super-P), sodium carboxymethylcellulose (binding agent, CMC), butadiene-styrene rubber (Styrene ButadieneRubber, SBR) by weight 94: 1: 2: 3 mix with deionized water, stirring obtains cathode size, can regulate viscosity by deionized water in the whipping process; Then, cathode size is uniformly coated on the two sides of the thick negative current collector Copper Foil of 9 μ m, makes negative plate through colding pressing, cutting apart.
The preparation of lithium rechargeable battery: will be wound into electric core according to positive plate, negative plate and three layers of composite isolated film of PP/PE/PP that aforementioned technology makes, the winding-structure of electricity core as shown in Figure 1, wherein, 10 is that plus plate current-collecting body, 20 is that positive electrode active material layer, 30 is that barrier film, 40 is that negative current collector, 50 is negative electrode active material layer; LiPF through terminal welding, packaging foil encapsulation, injection 1mol/l
6/ (EC+DEC+PC) electrolyte, encapsulation change into and the moulding of bleeding after make the embodiment of the invention 1 lithium rechargeable battery.Wherein, the volume ratio of ethylene carbonate (EC), diethyl carbonate (DEC), propene carbonate (PC) is 1: 1: 1.
Electric core among the embodiment 1 is carried out deep discharge to 0.0V with the multiplying power of 0.1C at normal temperatures, and test result as shown in Figure 3.
As can be seen from Figure 3, compare with comparative example, embodiment 1,2 2.3～2.4V many a tangible discharge platform, the capacity of discharge platform reaches electric core at more than 5% of 2.0～4.2V capacity.Comparative example is very steep at the discharge curve in 2.0～3.0V interval, and capacity seldom.Embodiment 2
The preparation of positive plate: with 70wt%LiMn
2O
4The Li of+30wt%
1.03Ni
0.47Mn
0.47Al
0.03O
2, conductive carbon black (Super-P), polyvinylidene fluoride (PVDF) be by weight 93: 3: 4 and N, N-dimethyl pyrrolidone (NMP) mixes, stirring obtains anode sizing agent, can regulate viscosity by NMP in the whipping process; Then, anode sizing agent is uniformly coated on the two sides of the thick plus plate current-collecting body aluminium foil of 16 μ m, and makes positive plate through colding pressing, cutting apart according to needed size.
The preparation of negative plate, the preparation of lithium rechargeable battery are with embodiment 1.
Comparative example is pressed identical grouping standard (capacity: 20mAh with embodiment 1,2 each 5 electric core; pressure reduction: 10mV) be connected into 5 battery pack of going here and there; do not cross under the situation of putting protection there being single electric core; discharge and recharge with 0.7C/10C; the cycle life of battery pack as shown in Figure 4, the maximum differential pressure between the electric core of battery pack when discharge is terminal is as shown in Figure 5.
As can be seen from Figure 4, the cycle life of the 5 string battery pack of embodiment 1,2 is greatly improved with respect to the cycle life of 5 string battery pack of comparative example, reason is: the electric core of 5 string battery pack of comparative example is after circulation, capacity volume variance increases the big electric core that causes decaying and is put excessively, make the voltage difference of single electric core in the battery pack along with circulation is increasing, even reach more than the 1.0V, put the quick decay that has further caused capacity and cross, this vicious circle causes battery pack just circulation diving about 50 circulations.In the 5 string battery pack of embodiment 1,2, the voltage difference of single electric core because buffer platform (2.2～2.4V) existence, cycle life is improved greatly, after 250 circulations, circulation volume still remains on more than 85%, and the pressure reduction between electric core also remains at 0.5～0.7V.
Comparative example lithium rechargeable battery and embodiment 1 lithium rechargeable battery are discharged into 3.0V at normal temperatures, simulate leakage current then, to 0.5V, predict its storage time under leakage current with this with the current discharge of 0.01mA, test result is referring to table 1.Table 1 comparative example and embodiment 1,2 storge qualities
| Storage time | 2 months | 6 months |
| Comparative example | 0.53V | / |
| | 2.4V | 2.25V |
| Embodiment 2 | 2.4V | 2.25V |
From voltage data shown in the table 1 as can be seen, under discharge condition, embodiment 1,2 lithium rechargeable batteries still remain on more than the 2.0V through voltage after 6 months at normal temperatures; And comparative example lithium rechargeable battery voltage after 2 months has dropped to 0.5V, and Li is described
1.1Ni
0.45Mn
0.45O
2And Li
1.03Ni
0.47Mn
0.47Al
0.03O
2Can improve the storge quality and the security performance of lithium rechargeable battery effectively.With
Need to prove, though among the embodiment 1,2 of this specification respectively with LiMn
2O
4The middle Li that adds
1.05Ni
0.45Mn
0.45Co
0.05O
2And Li
1.03Ni
0.47Mn
0.47Al
0.03O
2The present invention will be described for example, and still, according to other embodiments of the invention, positive active material can also be Li
zCo
1-(x+y)Ni
xMn
yO
2, LiCoO
2, LiNiO
2, LiCo
2xNi
1-2xO
2, LiVPO
4, Li
2MnO
3, LiMn
2-xM2
xO
4In one or more, wherein, 0＜x, y＜0.5,1＜z＜1.2, M2 is one or more among Li, Al, Mg, Zn, Cr, La, Nd, Ti, Sn, the V; Negative electrode active material also can be selected from hard carbon, Li
4Ti
5O
12, metal nitrogen or phosphide, Sn, Si or its combination; Organic solvent also can be propylene carbonate, vinyl carbonate, 1,2-dimethoxy-ethane, 1,2-diethoxyethane, diethyl carbonate, dimethyl carbonate, gamma-butyrolacton, oxolane, diethyl ethyl phosphonate, sulfoxide, methyl sulfoxide, dioxolane, acetonitrile or its combination; Electrolytic salt can be LiClO
4, LiAsF
6, LiPF
6, LiBF
4, LiB (C
6H
5)
4, LiCl, LiBr, CH
3SO
3Li, LiBOB, CF
3SO
3Li or its combination; Barrier film can be polypropylene barrier film (PP), polyethylene barrier film (PE), or PP and PE composite high-molecular barrier film, or the polymer gel attitude barrier film that forms of polyvinylidene fluoride, vinylidene difluoride-hexafluoropropylene copolymer, polymethyl methacrylate (PMMA), polyethylene glycol (PEG), or the composite isolated film of aforementioned composite high-molecular barrier film and aforementioned polymer gel state barrier film.
In addition, though provided electric core schematic diagram in this specification with winding-structure,, be understandable that positive plate, barrier film and negative plate can be made circle or rectangular cell by winding method, perhaps make rectangular cell by the lamination mode.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change and revise above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the present invention is not limited to also should fall in the protection range of claim of the present invention modifications and changes more of the present invention.In addition, although used some specific terms in this specification, these terms do not constitute any restriction to the present invention just for convenience of description.
Claims (10)
1. lithium rechargeable battery, it comprises: positive plate, negative plate, be interval in the barrier film between positive plate and the negative plate, and electrolyte, positive plate comprises plus plate current-collecting body and the positive active material that is distributed on the plus plate current-collecting body, negative plate comprises negative current collector and the negative electrode active material that is distributed on the negative current collector, and it is characterized in that: described positive active material contains transition metal oxide Li
1+xNi
1-x-y-zMn
yMl
zO
2, wherein, M1 is Co, Ti, Fe, Zr, Cu, Al, Mg, Zn, Sn, Ca or V, 0＜x＜0.3,0.1＜y＜0.6,0＜z＜0.2.
2. lithium rechargeable battery according to claim 1 is characterized in that: described positive active material also contains Li
zCo
1-(x+y)Ni
xMn
yO
2, LiCoO
2, LiNiO
2, LiCo
2xNi
1-2xO
2, LiVPO
4, Li
2MnO
3, LiMn
2-xM2
xO
4In one or more, wherein, 0＜x, y＜0.5,1＜z＜1.2, M2 is one or more among Li, Al, Mg, Zn, Cr, La, Nd, Ti, Sn, the V.
3. lithium rechargeable battery according to claim 2 is characterized in that: described transition metal oxide Li
1+xNi
1-x-y-zMn
yMl
zO
2Weight ratio in mixed cathode active material is 10% to 95%.
4. lithium rechargeable battery according to claim 1 is characterized in that: described lithium rechargeable battery has capacity in voltage range 3.0-4.2V, has voltage platform and part capacity under voltage range 2.0-2.5V.
5. lithium rechargeable battery according to claim 1 is characterized in that: described negative electrode active material is selected from graphite, hard carbon, Li
4Ti
5O
12, metal nitrogen or phosphide, Sn, Si or its combination.
6. lithium rechargeable battery according to claim 1 is characterized in that: described electrolyte comes from the organic solvent system that electrolytic salt is dissolved in organic solvent or has polymeric system to support.
7. lithium rechargeable battery according to claim 6, it is characterized in that: described organic solvent is selected from propylene carbonate, vinyl carbonate, 1,2-dimethoxy-ethane, 1,2-diethoxyethane, diethyl carbonate, dimethyl carbonate, gamma-butyrolacton, oxolane, diethyl ethyl phosphonate, sulfoxide, methyl sulfoxide, dioxolane, acetonitrile or its combination.
8. lithium rechargeable battery according to claim 6 is characterized in that: described electrolytic salt is selected from LiClO
4, LiAsF
6, LiPF
6, LiBF
4, LiB (C
6H
5)
4, LiCl, LiBr, CH
3SO
3Li, LiBOB, CF
3SO
3Li or its combination.
9. lithium rechargeable battery according to claim 1 is characterized in that: described positive plate, barrier film and negative plate are made circle or rectangular cell by winding method, perhaps make rectangular cell by the lamination mode.
10. lithium rechargeable battery according to claim 1, it is characterized in that: described barrier film is polypropylene barrier film, polyethylene barrier film, or polypropylene and polyethylene composite high-molecular barrier film, or the polymer gel attitude barrier film that forms of polyvinylidene fluoride, vinylidene difluoride-hexafluoropropylene copolymer, polymethyl methacrylate, polyethylene glycol, or the composite isolated film of aforementioned composite high-molecular barrier film and aforementioned polymer gel state barrier film.
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|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454589A (en) * | 2012-06-04 | 2013-12-18 | 中国科学院深圳先进技术研究院 | Battery module performance detecting method for electric car |
| CN103606705A (en) * | 2013-11-27 | 2014-02-26 | 北京国能电池科技有限公司 | Lithium ion battery and preparation method thereof |
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| US20070178370A1 (en) * | 2006-02-02 | 2007-08-02 | The University Of Chicago | Lithium-ion batteries with intrinsic pulse overcharge protection |
| CN101136499A (en) * | 2006-08-29 | 2008-03-05 | 三洋电机株式会社 | Nonaqueous electrolyte secondary battery |
| CN101134699A (en) * | 2006-08-29 | 2008-03-05 | 奥克森诺奥勒芬化学股份有限公司 | Method for the production of iso-olefines |
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| CN103454589A (en) * | 2012-06-04 | 2013-12-18 | 中国科学院深圳先进技术研究院 | Battery module performance detecting method for electric car |
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