CN103730688B - Lithium ion battery and electrolyte thereof - Google Patents
Lithium ion battery and electrolyte thereof Download PDFInfo
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- CN103730688B CN103730688B CN201410009960.4A CN201410009960A CN103730688B CN 103730688 B CN103730688 B CN 103730688B CN 201410009960 A CN201410009960 A CN 201410009960A CN 103730688 B CN103730688 B CN 103730688B
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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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
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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
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a kind of lithium ion battery and electrolyte thereof. The electrolyte of the lithium ion battery of the present invention includes non-aqueous organic solvent; Lithium salts, is dissolved in non-aqueous organic solvent; And additive, it is dissolved in non-aqueous organic solvent. Described additive includes: fluorinated ethylene carbonate (FEC), and weight/mass percentage composition in the electrolytic solution is 1%��15%; PS (PS), weight/mass percentage composition in the electrolytic solution is 0.5%��10%; And there is the oxalate containing two double bonds of Formulas I structure, weight/mass percentage composition in the electrolytic solution is 0.01%��5%, and wherein, in Formulas I, n is the integer selected from 0��4. The lithium ion battery of the present invention includes anode pole piece; Cathode pole piece; Isolating membrane, is interval between adjacent anode pole piece and cathode pole piece; And above-mentioned electrolyte. The lithium ion battery of the present invention has excellent charge-discharge performance under high temperature high voltage.
Description
Technical field
The present invention relates to field of batteries, particularly relate to a kind of lithium ion battery and electrolyte thereof.
Background technology
Along with popularizing of the electronic mobile device such as notebook computer, mobile phone, handheld device and panel computer, people are also more and more higher to the performance requirement of electronic mobile device. But performance is more high, function gets over the electronic product of fancy, and its power consumption is more fast, and therefore people are in the urgent need to having the lithium ion battery of higher energy density.
When improving the energy density of lithium ion battery (as improved the voltage of lithium ion battery), be equivalent to improve the activity of the electrochemical reaction of electrolyte, at this moment will there is violent redox reaction in electrolyte on both positive and negative polarity, but the substantial amounts of side reaction of simultaneous, the performance of lithium ion battery is subjected to very negative impact. In actual use, electronic product is also faced with as continued to use heating or lithium ion battery to use ambient temperature rising etc., and these factors are all likely to make lithium ion battery be in the condition of high temperature, and now electrolyte is subjected to tightened up test. Owing to the oxidation Decomposition of electrolyte can cause that lithium ion battery cycle performance under the high temperature conditions declines, develop suitable additive and make it can be effectively formed on both positive and negative polarity can to reduce the protecting film that electrolyte and both positive and negative polarity react and become the topic being constantly subjected to concern.
Wherein, the interfacial reaction controlling electrolyte and electrode is to improve the key of lithium ion battery charge-discharge performance. In lithium ion battery, frequently with additive 1,3-N-morpholinopropanesulfonic acid lactone (PS) and fluorinated ethylene carbonate (FEC) improve cycle performance, Chinese patent application publication No. has been the patent disclosure of CN102005606A containing the electrolyte of a certain amount of PS and FEC, can in negative terminal surface film forming thus improving the cycle performance of lithium ion battery, but when voltage brings up to 4.4V, this combination cannot meet the requirement of the cycle performance improving lithium ion battery.
Summary of the invention
In view of Problems existing in background technology, it is an object of the invention to provide a kind of lithium ion battery under high temperature high voltage with excellent charge-discharge performance and electrolyte thereof.
To achieve these goals, in a first aspect of the present invention, the invention provides the electrolyte of a kind of lithium ion battery, including non-aqueous organic solvent; Lithium salts, is dissolved in non-aqueous organic solvent; And additive, it is dissolved in non-aqueous organic solvent. Described additive includes: fluorinated ethylene carbonate (FEC), and weight/mass percentage composition in the electrolytic solution is 1%��15%; PS (PS), weight/mass percentage composition in the electrolytic solution is 0.5%��10%; And there is the oxalate containing two double bonds of Formulas I structure, weight/mass percentage composition in the electrolytic solution is 0.01%��5%, and wherein, in Formulas I, n is the integer selected from 0��4.
In a second aspect of the present invention, the invention provides a kind of lithium ion battery, including: anode pole piece; Cathode pole piece; Isolating membrane, is interval between adjacent anode pole piece and cathode pole piece; And electrolyte. Described electrolyte is the electrolyte of first aspect present invention.
Relative to prior art, the invention have the benefit that
The lithium rechargeable battery of the present invention has excellent charge-discharge performance under high temperature high voltage.
Detailed description of the invention
The following detailed description of the lithium ion battery according to the present invention and electrolyte thereof and comparative example and embodiment.
First the electrolyte of lithium ion battery according to a first aspect of the present invention is described.
The electrolyte of lithium ion battery according to a first aspect of the present invention, comprising: non-aqueous organic solvent; Lithium salts, is dissolved in non-aqueous organic solvent; And additive, it is dissolved in non-aqueous organic solvent. Described additive includes: fluorinated ethylene carbonate (FEC), and weight/mass percentage composition in the electrolytic solution is 1%��15%; PS (PS), weight/mass percentage composition in the electrolytic solution is 0.5%��10%; And there is the oxalate containing two double bonds of Formulas I structure, weight/mass percentage composition in the electrolytic solution is 0.01%��5%, and in Formulas I, n is the integer selected from 0��4.
In the electrolyte of lithium ion battery according to a first aspect of the present invention, described additive fluorinated ethylene carbonate (FEC) weight/mass percentage composition in the electrolytic solution can be 1%��5%.
In the electrolyte of lithium ion battery according to a first aspect of the present invention, described additive PS (PS) weight/mass percentage composition in the electrolytic solution can be 1%��5%.
In the electrolyte of lithium ion battery according to a first aspect of the present invention, it can be 0.5%��3% that described additive has the oxalate containing two double bonds of Formulas I structure weight/mass percentage composition in the electrolytic solution. When its weight/mass percentage composition in the electrolytic solution is lower than 0.5%, it is impossible to form stable SEI film on negative pole, the cycle performance of lithium ion battery is improved inconspicuous; And when its weight/mass percentage composition in the electrolytic solution is higher than 3%, the impedance of the SEI film of formation can sharply strengthen, thus worsening the cycle performance of lithium ion battery.
In the electrolyte of lithium ion battery according to a first aspect of the present invention, containing two double bonds in the molecular structure of the compound that Formulas I represents, easily in negative terminal surface generation reduction reaction, in positive electrode surface generation oxidation reaction, thus occurring electrochemical polymerization to generate polymer inactivation film. Analyzing the compound with Formulas I structure structure, when n is more than 4, the molecular weight of the compound with Formulas I structure strengthens, and the viscosity influence of electrolyte is very big, can reduce the electrical conductivity of electrolyte.
Under high temperature high voltage environment, electrolyte is had very strong oxidisability by positive pole, causes that the high temperature cyclic performance of lithium ion battery is poor. 1,3-propane sultone (PS) can promote that fluorinated ethylene carbonate (FEC) forms SEI film and improves the high-temperature storage performance of lithium ion battery. The simple oxalate containing two double bonds with Formulas I structure can not suppress the non-aqueous organic solvent Allyl carbonate (PC) stripping to graphite, and fluorinated ethylene carbonate (FEC) can promote that the oxalate containing two double bonds with Formulas I structure forms the well SEI film of densification, it is made at high temperature to have good stability, thus being effectively passivated positive pole and negative terminal surface, it is suppressed that the electrolyte component oxidation Decomposition at positive electrode surface and the reduction decomposition in negative terminal surface. And the carbonates additive (such as carbonic acid two propylene) containing two double bonds, it is used alone or all can not be effectively formed stable SEI film with fluorinated ethylene carbonate (FEC) cooperation.
In the electrolyte of lithium ion battery according to a first aspect of the present invention, described non-aqueous organic solvent can include one or more in ethylene carbonate (EC), Allyl carbonate (PC), dimethyl carbonate (DMC) and diethyl carbonate (DEC).
In the electrolyte of lithium ion battery according to a first aspect of the present invention, described lithium salts is selected from LiN (CxF2x+ 1SO2)(CyF2y+1SO2) (wherein, x, y are positive integer), LiPF6��LiBF4��LiTFSI��LiBOB��LiAsF6��Li(CF3SO2)2N��LiCF3SO3And LiClO4In one or more.
Secondly lithium ion battery according to a second aspect of the present invention is described.
Lithium ion battery according to a second aspect of the present invention, comprising: anode pole piece; Cathode pole piece; Isolating membrane, is interval between adjacent anode pole piece and cathode pole piece; And electrolyte. Wherein, described electrolyte is the electrolyte of lithium ion battery according to a first aspect of the present invention.
In lithium ion battery according to a second aspect of the present invention, the charging of described lithium ion battery can more than or equal to 4.4V by voltage.
In lithium ion battery according to a second aspect of the present invention, described anode pole piece includes positive electrode active materials, at least one in described positive electrode active materials is selected from lithium transition-metal oxide, lithium transition-metal oxide adds other transition metal or nontransition metal obtains compound or their combination. Described lithium transition-metal oxide is selected from least one in lithium and cobalt oxides, lithium nickel oxide, lithium manganese oxide, Li, Ni, Mn oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide.
In lithium ion battery according to a second aspect of the present invention, described cathode pole piece includes negative active core-shell material, described negative active core-shell material selected from soft carbon, hard carbon, Delanium, native graphite, silicon, silicon oxide compound, silicon-carbon complex, lithium titanate, the metal or alloy of alloy can be formed with lithium, can insert, deviate from the metal-oxide of lithium or their combine at least one.
In lithium ion battery according to a second aspect of the present invention, isolating membrane is selected from the porous polymer film that polyethylene (PE) porous polymer film, PE/ polypropylene (PP) MULTILAYER COMPOSITE porous polymer film or pottery processed.
Next lithium ion battery according to the present invention and the embodiment of electrolyte, comparative example and test result are described.
Comparative example 1
(1) anode pole piece is prepared: by positive electrode active materials LiNi0.5Mn0.3Co0.2O2, conductive agent acetylene black, binding agent polyvinylidene fluoride (PVDF) by weight after 96:2:2 is sufficiently stirred for mix homogeneously in solvent N-methyl pyrilidone, be coated on collector Al paper tinsel and carry out drying, colding pressing, obtain anode pole piece.
(2) cathode pole piece is prepared: after negative active core-shell material graphite, conductive agent acetylene black, binding agent butadiene-styrene rubber (SBR), thickening agent sodium carboxymethyl cellulose (CMC) are sufficiently stirred for mix homogeneously according to weight ratio 95:2:2:1 in solvent deionized water, it is coated on collector Cu paper tinsel and carries out drying, colding pressing, obtain cathode pole piece.
(3) electrolyte is prepared: with concentration for 1MLiPF6For lithium salts, with the mixture of ethylene carbonate (EC), Allyl carbonate (PC) and diethyl carbonate (DEC) for non-aqueous organic solvent, the mass ratio of each carbonic ester is EC:PC:DEC=40:40:20. Additionally, possibly together with the PS (PS) that weight/mass percentage composition is 3% in electrolyte.
(4) lithium ion battery is prepared: anode pole piece, isolating membrane PE porous polymer film and cathode pole piece are folded in order, make isolating membrane PE porous polymer film be in the effect playing isolation in the middle of anode pole piece and cathode pole piece, and winding obtains naked battery core. Naked battery core is placed in outer package, injects the above-mentioned electrolyte prepared and encapsulate, obtaining lithium ion battery.
Comparative example 2
Preparing lithium ion battery according to the method identical with comparative example 1, simply when preparing electrolyte (i.e. step (3)), additive is only the fluorinated ethylene carbonate (FEC) that weight/mass percentage composition is 5%.
Comparative example 3
Preparing 1 lithium ion battery according to the method identical with comparative example 1, simply when preparing electrolyte (i.e. step (3)), additive is only oxalic acid two propylene that weight/mass percentage composition is 1%.
Comparative example 4
Lithium ion battery is prepared according to the method identical with comparative example 1, simply when preparing electrolyte (i.e. step (3)), additive is weight/mass percentage composition is the PS (PS) of 3% and fluorinated ethylene carbonate (FEC) that weight/mass percentage composition is 5%.
Comparative example 5
Lithium ion battery is prepared according to the method identical with comparative example 1, simply when preparing electrolyte (i.e. step (3)), additive is weight/mass percentage composition be 3% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 5% and oxalic acid two propylene that weight/mass percentage composition is 6.5%.
Comparative example 6
Lithium ion battery is prepared, simply when preparing electrolyte (i.e. step (3)), with concentration for 0.95MLiPF according to the method identical with comparative example 16And 0.05MLiBF4For lithium salts, additive is weight/mass percentage composition be 3% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 20% and oxalic acid two propylene that weight/mass percentage composition is 1.5%.
Embodiment 1
Lithium ion battery is prepared according to the method identical with comparative example 1, simply when preparing electrolyte (i.e. step (3)), additive is weight/mass percentage composition be 3% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 5% and oxalic acid two propylene that weight/mass percentage composition is 1%.
Embodiment 2
Lithium ion battery is prepared according to the method identical with comparative example 1, simply when preparing electrolyte (i.e. step (3)), additive is weight/mass percentage composition be 3% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 5% and oxalic acid divinyl ester that weight/mass percentage composition is 1%.
Embodiment 3
Lithium ion battery is prepared according to the method identical with embodiment 1, simply when preparing electrolyte (i.e. step (3)), additive is weight/mass percentage composition be 3% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 5% and oxalic acid two propylene that weight/mass percentage composition is 3%.
Embodiment 4
Lithium ion battery is prepared according to the method identical with embodiment 1, simply when preparing electrolyte (i.e. step (3)), additive is weight/mass percentage composition be 3% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 5% and oxalic acid two propylene that weight/mass percentage composition is 0.5%.
Embodiment 5
Lithium ion battery is prepared, simply when preparing electrolyte (i.e. step (3)), with concentration for 1MLiBF according to the method identical with comparative example 14For lithium salts, with the mixture of ethylene carbonate (EC), Allyl carbonate (PC) and dimethyl carbonate (DMC) for non-aqueous organic solvent, the mass ratio of each carbonic ester is EC:PC:DMC=30:30:40, additive is weight/mass percentage composition be 10% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 10% and oxalic acid divinyl ester that weight/mass percentage composition is 5%.
Embodiment 6
Lithium ion battery is prepared according to the method identical with embodiment 5, simply when preparing electrolyte (i.e. step (3)), additive is weight/mass percentage composition be 1% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 1% and oxalic acid divinyl ester that weight/mass percentage composition is 5%.
Embodiment 7
Lithium ion battery is prepared according to the method identical with comparative example 1, simply when preparing electrolyte (i.e. step (3)), additive is weight/mass percentage composition be 0.5% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 15% and oxalic acid dibutene ester that weight/mass percentage composition is 1%.
Embodiment 8
Lithium ion battery is prepared, simply when preparing electrolyte (i.e. step (3)), with concentration for 0.95MLiPF according to the method identical with comparative example 16And 0.05MLiBF4For lithium salts, additive is weight/mass percentage composition be 3% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 5% and oxalic acid two propylene that weight/mass percentage composition is 1.5%.
Embodiment 9
Lithium ion battery is prepared, simply when preparing electrolyte (i.e. step (3)), with concentration for 0.95MLiPF according to the method identical with comparative example 16It is lithium salts with 0.05MLiTFSI, additive is weight/mass percentage composition be 3% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 5% and oxalic acid two propylene that weight/mass percentage composition is 1%.
Embodiment 10
Lithium ion battery is prepared according to the method identical with comparative example 1, simply when preparing electrolyte (i.e. step (3)), additive is weight/mass percentage composition be 3% PS (PS), weight/mass percentage composition be the fluorinated ethylene carbonate (FEC) of 5% and oxalic acid dibutene ester that weight/mass percentage composition is 1%.
Finally provide the performance test process based on comparative example 1-6 and the lithium ion battery of embodiment 1-10 sum and test result.
Cycle performance is tested:
Each group takes 5 lithium ion batteries, by following steps, lithium ion battery is repeated charging and discharging, and calculate the discharge capacitance of lithium ion battery, using the meansigma methods of the discharge capacitance of 5 lithium ion batteries as the discharge capacitance of this lithium ion battery.
First, in the environment of 45 DEG C, carry out first time charging and discharging, constant current and constant-voltage charge is carried out under the charging current of 0.5C (namely bleeding off the current value of theoretical capacity in 2h completely), until upper voltage limit is 4.4V, then under the discharge current of 0.7C, carry out constant-current discharge, until final voltage is 3V, the discharge capacity that record circulates first;Then carry out the charging and discharging circulation of 200 times, record the discharge capacity of the 200th circulation.
Discharge capacitance=(discharge capacity of the discharge capacity/circulate first of the 200th circulation) �� 100%.
Next the performance test results of lithium rechargeable battery is analyzed.
Table 1 provides the parameter based on comparative example 1-6 and embodiment 1-10 and the performance test results.
The parameter of table 1 comparative example 1-6 and embodiment 1-10 and the performance test results
Contrast from comparative example 1-6 and embodiment 1-10 can be seen that, introduce oxalic acid two propylene (comparative example 3) individually and can not improve lithium ion battery cycle performance under high temperature high voltage, the discharge capacitance of lithium ion battery even ratio is introduced separately into 1, 3-N-morpholinopropanesulfonic acid lactone (PS) and/or fluorinated ethylene carbonate (FEC) also low (comparative example 1, comparative example 2 and comparative example 4), this is due to 1, 3-N-morpholinopropanesulfonic acid lactone (PS) can promote that fluorinated ethylene carbonate (FEC) forms SEI film, thus improving the high-temperature storage performance of lithium ion battery. and when having the oxalate and 1 containing two double bonds of Formulas I structure, when 3-N-morpholinopropanesulfonic acid lactone (PS) and fluorinated ethylene carbonate (FEC) collocation use, significantly improve lithium ion battery cycle performance under high temperature high voltage, this is owing to fluorinated ethylene carbonate (FEC) can promote that the oxalate containing two double bonds with Formulas I structure forms the well SEI film of densification, it is made at high temperature to have good stability, thus being effectively passivated positive electrode surface and negative terminal surface, suppress the electrolyte component oxidation Decomposition at positive electrode surface and the reduction decomposition in negative terminal surface.
Comparative example 1, embodiment 2 and embodiment 10 it can be seen that add 1% oxalic acid divinyl ester, 1% oxalic acid two propylene and 1% oxalic acid dibutene ester all reached good to improve effect; But the oxalic acid dibutene ester of 1% compared with above the two, the discharge capacitance of its lithium ion battery declines to some extent, and this is likely to relevant with the chain length of the organic salt formed in SEI membrane component, and strand is more long, the viscosity influence of electrolyte is more big, the electrical conductivity of electrolyte can be reduced.
From the contrast of comparative example 5, embodiment 1, embodiment 3 and embodiment 4, it can be seen that changing concentration also can affect the cycle performance of lithium ion battery, and when the weight/mass percentage composition of oxalic acid two propylene is less, the capability retention of lithium ion battery is higher; When the weight/mass percentage composition of oxalic acid two propylene is too high (comparative example 5), the impedance of the SEI film of formation can sharply strengthen, and worsens the cycle performance of lithium ion battery on the contrary. Equally, when the weight/mass percentage composition of fluorinated ethylene carbonate (FEC) is too high (comparative example 6), the cycle performance of lithium ion battery can also be worsened.
It can be seen that be suitably introduced into LiBF in lithium salts from embodiment 8 and embodiment 94With the cycle performance that LiTFSI can be obviously improved lithium ion battery.
Claims (10)
1. an electrolyte for lithium ion battery, including:
Non-aqueous organic solvent;
Lithium salts, is dissolved in non-aqueous organic solvent; And
Additive, is dissolved in non-aqueous organic solvent,
It is characterized in that:
Described additive includes:
Fluorinated ethylene carbonate (FEC), weight/mass percentage composition in the electrolytic solution is 1%��15%;
PS (PS), weight/mass percentage composition in the electrolytic solution is 0.5%��10%;
And there is the oxalate containing two double bonds of Formulas I structure, weight/mass percentage composition in the electrolytic solution is 0.01%��5%,
Wherein, in Formulas I, n is the integer selected from 0��4.
2. the electrolyte of lithium ion battery according to claim 1, it is characterised in that described additive fluorinated ethylene carbonate (FEC) weight/mass percentage composition in the electrolytic solution is 1%��5%.
3. the electrolyte of lithium ion battery according to claim 1, it is characterised in that described additive PS (PS) weight/mass percentage composition in the electrolytic solution is 1%��5%.
4. the electrolyte of lithium ion battery according to claim 1, it is characterised in that it is 0.5%��3% that described additive has the oxalate containing two double bonds of Formulas I structure weight/mass percentage composition in the electrolytic solution.
5. the electrolyte of lithium ion battery according to claim 1, it is characterised in that described non-aqueous organic solvent includes one or more in ethylene carbonate, Allyl carbonate, dimethyl carbonate and diethyl carbonate.
6. the electrolyte of lithium ion battery according to claim 1, it is characterised in that described lithium salts is selected from LiN (CxF2x+ 1SO2)(CyF2y+1SO2)��LiPF6��LiBF4��LiTFSI��LiBOB��LiAsF6��Li(CF3SO2)2N��LiCF3SO3And LiClO4In one or more, wherein, x, y are positive integer.
7. a lithium ion battery, including:
Anode pole piece;
Cathode pole piece;
Isolating membrane, is interval between adjacent anode pole piece and cathode pole piece; And
Electrolyte;
It is characterized in that, described electrolyte is the electrolyte of the lithium ion battery according to any one of claim 1-6.
8. lithium ion battery according to claim 7, it is characterised in that the charging of described lithium ion battery by voltage more than or equal to 4.4V.
9. lithium ion battery according to claim 8, it is characterized in that, described anode pole piece includes positive electrode active materials, described positive electrode active materials at least one in the compound that lithium transition-metal oxide, lithium transition-metal oxide add other transition metal or nontransition metal obtains or their combination.
10. lithium ion battery according to claim 8, it is characterized in that, described cathode pole piece includes negative active core-shell material, described negative active core-shell material selected from soft carbon, hard carbon, Delanium, native graphite, silicon, silicon oxide compound, silicon-carbon complex, lithium titanate, the metal or alloy of alloy can be formed with lithium, can insert, deviate from the metal-oxide of lithium or their combine at least one.
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| US9673450B2 (en) | 2011-09-02 | 2017-06-06 | Solvay Sa | Lithium ion battery |
| EP2856540A1 (en) | 2012-06-01 | 2015-04-08 | E. I. Du Pont de Nemours and Company | Lithium- ion battery |
| WO2013180783A1 (en) | 2012-06-01 | 2013-12-05 | E. I. Du Pont De Nemours And Company | Fluorinated electrolyte compositions |
| JP2016519400A (en) | 2013-04-04 | 2016-06-30 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニーＥ．Ｉ．Ｄｕ Ｐｏｎｔ Ｄｅ Ｎｅｍｏｕｒｓ Ａｎｄ Ｃｏｍｐａｎｙ | Non-aqueous electrolyte composition |
| CN105990602A (en) * | 2015-02-24 | 2016-10-05 | 江苏省新动力电池及其材料工程技术研究中心有限公司 | Method for manufacturing high-capacity high-power power type lithium ion battery |
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| CN112635823A (en) * | 2019-09-24 | 2021-04-09 | 东莞市杉杉电池材料有限公司 | High-voltage lithium cobalt oxide lithium ion battery electrolyte and lithium ion battery |
| CN110718717B (en) * | 2019-10-18 | 2021-12-24 | 高朗科技(湖州)有限公司 | Electrolyte composed of solvent and electrolyte |
| WO2023184413A1 (en) * | 2022-03-31 | 2023-10-05 | 宁德新能源科技有限公司 | Electrochemical apparatus and electronic apparatus |
| CN116435707B (en) * | 2023-06-09 | 2023-09-19 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
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| CN1989647A (en) * | 2004-05-28 | 2007-06-27 | 宇部兴产株式会社 | Nonaqueous electrolytic solution and lithium secondary battery |
| CN103022556A (en) * | 2013-01-05 | 2013-04-03 | 宁德新能源科技有限公司 | Lithium-ion battery and electrolyte thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1501540A (en) * | 2002-11-15 | 2004-06-02 | ����Sdi��ʽ���� | Organic electrolytic solution and lithium battery using the same |
| CN1890836A (en) * | 2003-12-25 | 2007-01-03 | 三洋电机株式会社 | Nonaqueous electrolyte secondary battery |
| CN1989647A (en) * | 2004-05-28 | 2007-06-27 | 宇部兴产株式会社 | Nonaqueous electrolytic solution and lithium secondary battery |
| CN103022556A (en) * | 2013-01-05 | 2013-04-03 | 宁德新能源科技有限公司 | Lithium-ion battery and electrolyte thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3694041A4 (en) * | 2017-11-09 | 2021-11-10 | Daikin Industries, Ltd. | Electrolytic solution, electrochemical device, lithium-ion secondary cell, and module |
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| CN103730688A (en) | 2014-04-16 |
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