WO2011114605A1 - イオン液体を用いたリチウム二次電池 - Google Patents
イオン液体を用いたリチウム二次電池 Download PDFInfo
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- WO2011114605A1 WO2011114605A1 PCT/JP2011/000198 JP2011000198W WO2011114605A1 WO 2011114605 A1 WO2011114605 A1 WO 2011114605A1 JP 2011000198 W JP2011000198 W JP 2011000198W WO 2011114605 A1 WO2011114605 A1 WO 2011114605A1
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- positive electrode
- lithium secondary
- secondary battery
- active material
- ionic liquid
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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
- H01M10/0568—Liquid materials characterised by the solutes
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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
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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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- 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
- H01M10/0569—Liquid materials characterised by the solvents
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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
- H01M10/60—Heating or cooling; Temperature control
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/623—Portable devices, e.g. mobile telephones, cameras or pacemakers
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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
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Definitions
- the present invention relates to a lithium secondary battery using an ionic liquid as a flame retardant non-aqueous electrolyte, and more particularly to a lithium secondary battery using a non-aqueous electrolyte containing a bis (fluorosulfonyl) imide anion.
- Lithium secondary batteries are small and lightweight rechargeable batteries that have a large storage capacity per unit volume or unit weight and are widely used in mobile phones, notebook computers, personal digital assistants (PDAs), video cameras, digital cameras, It is indispensable for each portable device which is small and light and consumes a relatively large amount of power.
- PDAs personal digital assistants
- the development of medium- or large-sized lithium batteries to be mounted on electric bicycles and electric vehicles has been promoted, and the development is expected as a means for reducing the environmental load.
- a non-aqueous solvent used in a non-aqueous electrolyte of a lithium secondary battery a polar aprotic organic solvent that easily dissolves a lithium salt and is difficult to electrolyze is used. Since the point is very low, there is a risk of ignition or explosion due to heat generation at the time of overcharge or short circuit, and there is a big problem regarding the safety of the battery. Particularly in recent years, with the development of smaller and lighter electronic devices and the development of electric vehicles, the development of large-capacity, high-power lithium secondary batteries has become an urgent task, and safety issues have become an increasingly important solution. . For this reason, various studies have been made on the use of flame retardant ionic liquids as non-aqueous electrolytes for lithium secondary batteries.
- an ionic liquid containing bis (fluorosulfonyl) imide anion (FSI anion) as an anion component has a lower viscosity than other ionic liquids, has high performance even during high rate charge / discharge, and has a high energy density. Since it is high voltage and nonflammable, it is possible to provide a lithium battery with excellent safety by using this ionic liquid as a solvent for a non-aqueous electrolyte (Patent Document 1).
- a lithium battery using a combination of a normal graphitizable carbon electrode and an ionic liquid has higher internal resistance and inferior output characteristics as compared with an organic solvent battery, and deposition of lithium and decomposition products on the negative electrode surface As a result, the life characteristics tend to be low due to the above, and the practical level has not yet been reached.
- the present invention has been made in view of the above-mentioned problem of improving safety which is strongly demanded for lithium secondary batteries, and has flame retardancy that combines battery performance superior to conventional batteries and high safety.
- An object is to provide a lithium secondary battery.
- the lithium secondary battery of the present invention is a lithium secondary battery comprising a positive electrode, a negative electrode, a separator provided between the positive electrode and the negative electrode, and a non-aqueous electrolyte containing a lithium salt, and solves the above-described problems. Therefore, the positive electrode contains a positive electrode active material represented by the following general formula (1), and the non-aqueous electrolyte uses an ionic liquid containing a bis (fluorosulfonyl) imide anion as an anion component as a solvent.
- the above-described lithium secondary battery of the present invention can have a fully charged voltage of 4.4 V or higher and a discharge average voltage of 4.0 V or higher.
- the lithium secondary battery of the present invention has problems such as short circuit, ignition, and explosion of the battery, which may be caused by poor use environment of the battery or increase in internal temperature in the event of an accident due to the use of the flame retardant ionic liquid.
- the battery is excellent in safety with no danger of ignition or explosion even during overcharging or heat generation during short circuit.
- an ionic liquid containing bis (fluorosulfonyl) imide anion as an anionic component as the ionic liquid and using a lithium manganese nickel-based composite oxide in which the atomic ratio of manganese to nickel is a predetermined ratio for the positive electrode
- a lithium manganese nickel-based composite oxide in which the atomic ratio of manganese to nickel is a predetermined ratio for the positive electrode thus, it has excellent potential flatness and excellent charge / discharge characteristics in a high potential portion.
- the ionic liquid contained in the lithium secondary battery of the present invention contains a bis (fluorosulfonyl) imide anion as an anion component as described above. It should be noted that other anion components such as a bis (trifluoromethylsulfonyl) imide anion may be included as long as they are within the scope of the present invention.
- N, P, S, O, C, Si, or two or more types of elements is included in a structure, it is a chain
- Specific examples of cations containing nitrogen elements include alkylammonium such as trimethyl-N-propylammonium and triethylammonium, imidazolium such as ethylmethylimidazolium and butylmethylimidazolium, and N-methyl-N-propylpyrrolidi.
- Preferred examples include pyrrolidinium such as nitrogen and piperidinium such as N-methyl-N-propylpiperidinium.
- lithium salt dissolved in the ionic liquid as the supporting electrolyte for the nonaqueous electrolytic solution a lithium salt that is usually used as an electrolyte for a nonaqueous electrolytic solution can be used without any particular limitation.
- Such lithium salts include LiPF 6 , LiBF 4 , LiClO 4 , LiAsF 6 , LiCF 3 SO 3 , LiC (CF 3 SO 2 ) 3 , LiN (CF 3 SO 2 ) 2 , LiN (FSO 2 ) 2 , LiBC 4 O 8 and the like.
- Such a lithium salt is usually contained in the ionic liquid at a concentration of 0.1 to 2.0 mol / kg, preferably 0.3 to 1.5 mol / kg.
- the positive electrode used in the present invention uses a spinel-type composite oxide containing lithium, manganese, and nickel as the positive electrode active material.
- a preferred specific example is LiNi 0.5 Mn 1.5 O 4 .
- Al, Ca, Fe, and Cu may be included as long as they do not deviate from the object of the present invention.
- the method for preparing such a lithium manganese nickel composite oxide positive electrode material is not particularly limited, and can be produced by a known method such as a composite carbonate method.
- the lithium secondary battery of the present invention can be manufactured according to the conventional lithium secondary battery as follows except that the positive electrode active material and the non-aqueous electrolyte are used.
- the positive electrode was obtained by mixing the positive electrode active material with a conductive agent component, adding the powder mixture to a binder and dispersing the mixture, and adding a dispersion medium as necessary to dilute to a desired concentration. It is obtained by applying a paint to the surface of a positive electrode current collector such as an aluminum foil and drying it. Thereafter, roll press processing or the like is performed as necessary to obtain a predetermined press density.
- the thickness of the positive electrode mixture layer containing the positive electrode active material and the conductive agent formed on the surface of the positive electrode current collector is sufficient for the electron conductivity of the positive electrode mixture layer itself even in charge / discharge at a high rate of current. In order to maintain the thickness, it is preferably 50 ⁇ m or less per side, more preferably 10 to 50 ⁇ m. If the thickness of the positive electrode mixture layer becomes too thick, the electron conductivity in the thickness direction of the positive electrode mixture layer is lowered and the resistance is increased, so that the life characteristics may be remarkably lowered during high-rate charge / discharge.
- the negative electrode can be used without particular limitation as long as it can insert / extract metallic lithium or lithium ions, and a known material such as an alloy, silicon, or hard carbon can be used.
- a material obtained by mixing a negative electrode active material and a binder and applied to a current collector can be used.
- the negative electrode active material a known active material can be used without particular limitation.
- carbon materials such as natural graphite, artificial graphite, non-graphitizable carbon, graphitizable carbon, metallic materials such as metallic lithium and alloys, tin compounds, lithium transition metal nitrides, crystalline metal oxides, amorphous metals An oxide, a conductive polymer, etc. can be mentioned.
- an electron conductive material that does not adversely affect the battery performance can be used without any particular limitation.
- carbon black such as acetylene black and kettin black is used, but natural graphite (scale-like graphite, scale-like graphite, earth-like graphite, etc.), artificial graphite, carbon whisker, carbon fiber and metal (copper, nickel, aluminum,
- a conductive material such as silver, gold, etc.) powder, metal fiber, or conductive ceramic material may be used. These can be included as a mixture of two or more.
- the addition amount is preferably 1 to 30% by weight, particularly 2 to 20% by weight, based on the amount of the active material.
- any electronic conductor can be used as long as it does not adversely affect the constructed battery.
- a positive electrode current collector aluminum, titanium, stainless steel, nickel, calcined carbon, conductive polymer, conductive glass, etc., in addition to aluminum for the purpose of improving adhesiveness, conductivity, and oxidation resistance.
- a material obtained by treating the surface of copper or copper with carbon, nickel, titanium, silver or the like can be used.
- molded bodies such as a film form, a sheet form, a net form, the punched or expanded thing, a lath body, a porous body, and a foam other than foil shape, are also used.
- the thickness is not particularly limited, but a thickness of 1 to 100 ⁇ m is usually used.
- PVDF polyvinylidene fluoride
- HFP hexafluoropropylene
- PFMV perfluoromethyl vinyl ether
- TFE tetrafluoroethylene
- PVDF copolymer resins such as polytetrafluoroethylene (PTFE) and fluororubber, styrene-butadiene rubber (SBR), ethylene-propylene rubber (EPDM) styrene-acrylonitrile copolymer, etc.
- CMC carboxymethyl cellulose
- thermoplastic resins such as polyimide resin
- the addition amount is preferably 1 to 30% by weight, particularly 2 to 20% by weight, based on the amount of the active material.
- a porous film is used, and a microporous polymer film or a nonwoven fabric is preferably used.
- a porous film made of a polyolefin polymer is preferable.
- polyethylene, polypropylene microporous film, porous polyethylene film and polypropylene multilayer film, polyester fiber, aramid fiber, nonwoven fabric made of glass fiber, etc., and silica, alumina, titania on their surface The thing to which ceramic fine particles, such as these, were made to adhere is mentioned.
- the lithium secondary battery of the present invention can be formed into a cylindrical shape, a coin shape, a rectangular shape, or any other shape, and the basic configuration of the battery is the same regardless of the shape, and the design can be changed according to the purpose. Can be implemented.
- a disc-shaped negative electrode, a separator, a disc-shaped positive electrode, and a stainless steel plate are stacked and stored in a coin-type battery can, and a non-aqueous electrolyte is injected and sealed. Is done.
- Example 1 ⁇ Preparation of positive electrode> 100 g of LiNi 0.5 Mn 1.5 O 4 which is a positive electrode active material, 7.8 g of carbon black (trade name Super-P, manufactured by Timcal) as a conductive agent, 3.3 g of PVDF as a binder, and a dispersion medium 38.4 g of N-methyl-2-pyrrolidone (NMP) was mixed with a planetary mixer to prepare a positive electrode coating solution having a solid content of 56%.
- NMP N-methyl-2-pyrrolidone
- This coating solution was coated on an aluminum foil having a thickness of 20 ⁇ m with a coating machine, dried at 130 ° C., and then subjected to a roll press treatment to obtain a positive electrode having a positive electrode active material weight of 7.5 mg / cm 2 .
- MPPy N-methyl-N-propyl-pyrrolidinium
- Example 2 to 9, Comparative Examples 1 to 9 In the same manner as in Example 1, except that the positive electrode active material, the negative electrode active material, the solvent of the nonaqueous electrolytic solution (ionic liquid other than Comparative Example 3) and the supporting electrolyte (lithium salt) shown in Table 1 were used. A lithium secondary battery for testing was prepared. In Example 5, two types of solvents were used, and in Example 6, two types of negative electrode active materials were used. Therefore, their blending ratio is shown in parentheses in each column of Table 1.
- the initial discharge capacity at 20 ° C. and the capacity retention rate at the 20th cycle were measured as performance tests.
- the measuring method is as follows. The results are shown in Table 1.
- ⁇ Discharge capacity per weight of positive electrode active material The initial discharge capacity was measured at 25 ° C. using a charge / discharge test apparatus. Charging is performed at a current value of 0.1 C up to 4.8 V C.V. C. -C. V. (Constant current / Constant voltage). When the charging time reaches 17 hours or reaches a current value of 0.05 C, the charging is terminated. C. (Constant current). By dividing the obtained measured value of the initial discharge capacity by the weight of the positive electrode active material, the discharge capacity per weight of the positive electrode active material was determined.
- the charging time was 12 hours or when the current value reached 0.05 C, charging was terminated.
- Discharge was performed at a current value of 0.1 C up to 3.0 V C.V. C. (Constant current).
- the discharge capacity at the first cycle and the discharge capacity at the 20th cycle are measured, and the ratio of the discharge capacity at the 20th cycle based on the discharge capacity at the 1st cycle is “the discharge capacity maintenance rate (%) at the 20th cycle”.
- the discharge capacity maintenance rate (%) at the 20th cycle was calculated.
- the lithium secondary battery of the present invention can be used for various portable devices such as a mobile phone, a notebook computer, a personal digital assistant (PDA), a video camera, and a digital camera. Furthermore, it is useful as a medium-sized or large-sized lithium battery mounted on an electric bicycle or an electric vehicle.
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Abstract
Description
但し、式(1)中、x,yは、x+y=2であり、かつx:y=27.5:72.5~22.5:77.5である関係を満たす数である。
<正極の作製>
正極活物質であるLiNi0.5Mn1.5O4を100g、導電剤としてカーボンブラック(Timcal社製、商品名Super-P)を7.8g、バインダーとしてPVDFを3.3g、分散媒としてN-メチル-2-ピロリドン(NMP)を38.4g、それぞれを遊星型ミキサーで混合し、固形分56%の正極塗工液を調製した。この塗工液を塗工機で厚み20μmのアルミニウム箔上にコーティングし、130℃で乾燥後ロールプレス処理を行い、正極活物質重量7.5mg/cm2の正極を得た。
負極活物質であるグラファイトを100g、導電剤としてカーボンブラック(Timcal社製、商品名Super-P)を0.55g、バインダーとしてPVDF8.7g、分散媒としてNMPを79.1g、それぞれ遊星型ミキサーで混合し、固形分58%の負極塗工液を調製した。この塗工液を厚み10μmの電解銅箔上にコーティングし、130℃で乾燥後ロールプレス処理を行い、負極活物質重量3.2mg/cm2の負極を得た。
上記により得られた正極、負極間に、セパレータとして厚み40μmのポリエチレン系セパレータを挟んだ構造の積層体を作成し、端子を取り出すためのタブリードを溶接したのち、折り返したアルミラミネート包材に入れ、正極面積18cm2、負極面積19.84cm2のリチウム二次電池を作製した。電解液としてN-メチル-N-プロピル-ピロリジニウム(MPPy)-FSI溶媒に1.2mol/kgのLiTFSIを溶解した溶液を注入した後、開放部のアルミラミネートをヒートシーラーで封止し、試験用のリチウム二次電池を作製した。
正極活物質、負極活物質、非水電解液の溶媒(比較例3以外はイオン液体)及び支持電解質(リチウム塩)として表1に示したものを用いた以外は実施例1と同様にして、試験用のリチウム二次電池を作製した。なお、実施例5では2種の溶媒を使用し、実施例6では2種の負極活物質を使用しているので、それらの配合比を表1の各欄の括弧内に示す。
充放電試験装置を用いて、25℃で初期放電容量を測定した。充電は、電流値0.1Cで4.8VまでC.C.-C.V.(定電流・定電圧)で行い、充電時間17時間もしくは0.05Cの電流値となったら充電終了とし、放電は電流値0.1Cで3.0VまでC.C.(定電流)で行なった。得られた初期放電容量の測定値を正極活物質の重量で除することにより、正極活物質重量当り放電容量を求めた。
充放電装置(製品名:ACD-10APS、アスカ電子(株)製)にて測定した。
電流値0.1Cで4.8VまでC.C.-C.V.(定電流・定電圧)で行い、充電時間12時間もしくは0.05Cの電流値となったら充電終了とした。放電は電流値0.1Cで3.0VまでC.C.(定電流)の条件で行った。1サイクル目の放電容量及び20サイクル目の放電容量を測定し、1サイクル目の放電容量を基準とした20サイクル目の放電容量の割合である「20サイクル目の放電容量維持率(%)」を算出した。
Claims (2)
- 正極、負極、前記正極と負極との間に設けたセパレータ、及びリチウム塩を含む非水電解液からなるリチウム二次電池であって、
前記正極が下記一般式(1)で表される正極活物質を含み、
前記非水電解液がビス(フルオロスルホニル)イミドアニオンをアニオン成分として含むイオン液体を溶媒として用いたものであることを特徴とするリチウム二次電池。
LiNixMnyO4 (1)
但し、式(1)中、x,yは、x+y=2であり、かつx:y=27.5:72.5~22.5:77.5である関係を満たす数である。 - 満充電時の電圧が4.4V以上であり、放電平均電圧が4.0V以上であることを特徴とする、請求項1に記載のリチウム二次電池。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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EP11755798.3A EP2549577B1 (en) | 2010-03-19 | 2011-01-17 | Lithium secondary battery using ionic liquid |
US13/635,837 US9225037B2 (en) | 2010-03-19 | 2011-01-17 | Lithium secondary battery using ionic liquid |
CN2011800146351A CN103119773A (zh) | 2010-03-19 | 2011-01-17 | 使用离子液体的锂二次电池 |
CA2792747A CA2792747C (en) | 2010-03-19 | 2011-01-17 | Lithium secondary battery using ionic liquid |
KR1020127026008A KR101798259B1 (ko) | 2010-03-19 | 2011-01-17 | 이온액체를 이용한 리튬이차전지 |
JP2012505462A JP5702362B2 (ja) | 2010-03-19 | 2011-01-17 | イオン液体を用いたリチウム二次電池 |
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JP2010-064172 | 2010-03-19 | ||
JP2010064172 | 2010-03-19 |
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WO2011114605A1 true WO2011114605A1 (ja) | 2011-09-22 |
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JP2015144108A (ja) * | 2013-12-27 | 2015-08-06 | 旭硝子株式会社 | リチウムイオン二次電池正極用の表面修飾リチウム含有複合酸化物 |
JP2019046746A (ja) * | 2017-09-06 | 2019-03-22 | 学校法人 関西大学 | 電解液および当該電解液を用いた蓄電デバイス |
JP2019114531A (ja) * | 2017-12-22 | 2019-07-11 | ベレノス・クリーン・パワー・ホールディング・アーゲー | リチウム金属二次電池のための液体電解質組成物及びかかる液体電解質組成物を有するリチウム金属二次電池 |
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US10400674B2 (en) * | 2014-05-09 | 2019-09-03 | United Technologies Corporation | Cooled fuel injector system for a gas turbine engine and method for operating the same |
US11038165B2 (en) * | 2014-05-29 | 2021-06-15 | Sila Nanotechnologies, Inc. | Ion permeable composite current collectors for metal-ion batteries and cell design using the same |
KR102280684B1 (ko) * | 2014-08-27 | 2021-07-22 | 삼성전자주식회사 | 리튬공기전지 및 이의 제조방법 |
JP6592891B2 (ja) * | 2014-12-22 | 2019-10-23 | 日清紡ホールディングス株式会社 | 二次電池用電解液および二次電池 |
JP6558694B2 (ja) * | 2015-09-02 | 2019-08-14 | 国立大学法人 東京大学 | 二次電池用難燃性電解液、及び当該電解液を含む二次電池 |
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CN103579610A (zh) * | 2013-11-15 | 2014-02-12 | 合肥国轩高科动力能源股份公司 | 锂离子电池正极材料镍锰酸锂的制备方法 |
JP2015144108A (ja) * | 2013-12-27 | 2015-08-06 | 旭硝子株式会社 | リチウムイオン二次電池正極用の表面修飾リチウム含有複合酸化物 |
JP2019046746A (ja) * | 2017-09-06 | 2019-03-22 | 学校法人 関西大学 | 電解液および当該電解液を用いた蓄電デバイス |
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EP2549577A1 (en) | 2013-01-23 |
CA2792747A1 (en) | 2011-09-22 |
KR20130059323A (ko) | 2013-06-05 |
US9225037B2 (en) | 2015-12-29 |
CN103119773A (zh) | 2013-05-22 |
EP2549577B1 (en) | 2019-03-13 |
EP2549577A4 (en) | 2014-11-05 |
JPWO2011114605A1 (ja) | 2013-06-27 |
JP5702362B2 (ja) | 2015-04-15 |
CA2792747C (en) | 2017-11-07 |
US20130017456A1 (en) | 2013-01-17 |
KR101798259B1 (ko) | 2017-11-15 |
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