WO2004001889A1 - 非水電解質二次電池 - Google Patents
非水電解質二次電池 Download PDFInfo
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- WO2004001889A1 WO2004001889A1 PCT/JP2003/007944 JP0307944W WO2004001889A1 WO 2004001889 A1 WO2004001889 A1 WO 2004001889A1 JP 0307944 W JP0307944 W JP 0307944W WO 2004001889 A1 WO2004001889 A1 WO 2004001889A1
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- Prior art keywords
- battery
- mass
- derivative
- parts
- benzene ring
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Classifications
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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
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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
- H01M10/05—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
- H01M10/0567—Liquid materials characterised by the additives
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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
Definitions
- the present invention relates to a non-aqueous electrolyte secondary battery including a positive electrode for absorbing and releasing lithium ion, a negative electrode for storing and releasing lithium ion, and a non-aqueous electrolyte. Regarding improvement. Background technology
- Non-aqueous electrolyte secondary batteries typified by lithium ion secondary batteries have a high energy density and a high capacity. It is widely used.
- Non-aqueous electrolyte secondary batteries usually have a positive electrode made of a lithium-containing transition metal composite oxide, a negative electrode made of a carbon material such as graphite, and a lithium salt dissolved in a non-aqueous solvent.
- the used non-aqueous electrolyte is used.
- lithium ions move between the positive and negative electrodes during charge and discharge, and dendrites (lithium) do not exist in a metallic state. (Dendrite type) Internal short circuit due to lithium does not occur. Therefore, it is excellent in safety.
- excess lithium ion is pulled out from the positive electrode, and excess lithium ion is removed from the negative electrode.
- Electrolyte is decomposed due to the extremely biased potential of both electrodes as well as deterioration of battery characteristics.
- the decomposition of the electrolytic solution generates gas and generates heat due to the increase in the internal resistance of the battery, causing the internal pressure of the battery to increase rapidly and causing the battery to burst or run away. May be rubbed.
- non-aqueous electrolyte secondary batteries are equipped with a current interrupting device that shuts off overcharge current when it occurs.
- a current interrupting device that shuts off overcharge current when it occurs.
- this type of device operates and cuts off the current when the internal pressure of the battery rises, it is necessary to wait until the abnormality occurs in the battery and the internal pressure of the battery rises. There is mulag. For this reason, it takes time for the current interrupter to operate, and if the temperature suddenly rises, it is not possible to ensure sufficient battery safety. .
- Japanese Unexamined Patent Publication No. Hei 5-336439 discloses that a linear alkylbenzene derivative is added to a nonaqueous solvent in a nonaqueous electrolyte secondary battery equipped with a current interrupting device.
- the technology is disclosed.
- the linear alkylbenzen derivative is decomposed during overcharge to generate methane, which reacts with active oxygen released from the positive electrode. Since this is consumed, it is said that the temperature rise due to active oxygen can be prevented.
- the linear alkylbenzene derivative does not have the effect of directly blocking the overcharge current, nor does it have the effect of increasing the response speed of the current breaker. With this technology, sufficient safety cannot be ensured even when the temperature of the battery rises rapidly.
- Japanese Patent Application Laid-Open No. Hei 9-116835 discloses that a non-aqueous solvent to which thiophene, biphenyl, flavan, etc. are added is used. It discloses a technology to prevent overcharging. According to this technology, compounds such as thiophene, biphenyl, and franne can be used at potentials above the maximum operating voltage of the battery. It is believed that over-charging can be prevented because the polymer is polymerized to form a high-resistance film on the electrode surface. However, the above compounds have the problem of deteriorating power generation performance and also do not polymerize unless exposed to high temperatures of 120 ° C or higher. However, even if the above compound is used, there is a problem that the current is not interrupted unless the battery temperature becomes high.
- a non-aqueous solvent is a tertiary compound which is adjacent to a cycloalkylbenzene derivative or a phenyl group.
- the above-mentioned additive proposed by the present inventors is chemically decomposed at the time of overcharging, generates hydrogen gas, and does not dissolve in the non-aqueous solvent due to polymerization of molecules with each other Form a stable coating and a large coating of the electric resistor on the negative electrode surface. Therefore, according to this technique, the hydrogen gas generated from the electrode and the high-resistance film act to quickly increase the internal resistance and prevent overcharging at an early stage. Increased safety against sudden temperature rise.
- the non-aqueous solvent to which the above additives are added is a non-aqueous electrolyte equipped with a current interrupt device.
- a current interrupt device equipped with a current interrupt device.
- An object of the present invention is to provide a highly safe nonaqueous electrolyte secondary battery having good high-temperature cycle characteristics and capable of preventing overcharging. Further, in a battery provided with a current interrupting device, the responsiveness of the current interrupting device is also enhanced to provide a non-aqueous electrolyte secondary battery with higher safety. .
- the object of the present invention can be achieved by the following configuration.
- the non-aqueous solvent has a cycloalkyl benzene derivative and a quaternary carbon directly bonded to the benzene ring, and is directly bonded to the benzene ring.
- a non-aqueous electrolyte secondary battery comprising: an alkylbenzen derivative having no cycloalkyl group;
- Cycloalkylbenzen derivatives have high reactivity with hydrogen atoms bonded to the ⁇ -carbon of the cycloalkyl group (carbon directly bonded to the benzene ring), and this compound is used during overcharge. Hydrogen is easily extracted. As a result, during overcharging, the cycloalkylbenzen derivative is rapidly decomposed at the negative electrode to generate hydrogen gas, and itself polymerizes to form on the surface of the negative electrode. Form a stable film. This coating has high electric resistance. Therefore, according to the above configuration, the internal resistance increases quickly due to the generated hydrogen gas and the high-resistance film, so that overcharging occurs before the temperature rises sharply. Is suppressed.
- alkylbenzene derivatives having a quaternary carbon directly bonded to the benzene ring and having no cycloalkyl group bonded directly to the benzene ring A conductor (hereinafter, sometimes abbreviated as an alkylbenzene derivative having a quaternary carbon directly bonded to a benzene ring) is adsorbed on the surface of the negative electrode to form a film, and Also, make sure that the cycloalkyl benzene derivative does not directly contact the negative electrode. This suppresses the decomposition of the cycloalkylbenzene derivative at a high temperature, thereby preventing the degradation of the high-temperature cycle characteristics.
- the non-aqueous solvent may further include an unsaturated cyclic carbonate derivative.
- This configuration is more preferable because the unsaturated cyclic carbonate acts to suppress the decomposition of the cycloalkyl benzene derivative at high temperatures.
- alkylbenzene derivatives having a quaternary carbon directly bonded to the benzene ring are mainly adsorbed on the basic surface of carbon, and unsaturated cyclic carbonate is different from this. It is adsorbed on the negative electrode site (mainly the edge surface of carbon), so that the decomposition of the cycloalkylbenzene derivative can be more effectively suppressed in both phases. This is because that .
- the content of the cycloalkyl benzene derivative is 0.5 to 5 with respect to 100 parts by mass of the nonaqueous solvent. Parts by mass, having a quaternary carbon directly bonded to the benzene, and having no cycloalkyl group directly bonded to the benzene ring.
- the content of the kilbene derivative is 0.
- the addition amount of the alkyl mouth alkylbenzene derivative is less than 0.5 part by mass with respect to 100 parts by mass of the non-ice solvent, a sufficient overcharge preventing effect cannot be obtained, and 5 parts by mass is not obtained. If the number is larger than the number of parts, the resistance becomes larger due to the film formed on the negative electrode surface. For this reason, it is preferable that the addition amount of the cycloalkyl benzene derivative be 0.5 parts by mass or more and 5 parts by mass or less based on 100 parts by mass of the nonaqueous solvent.
- the amount of the alkylbenzene derivative having a quaternary carbon directly bonded to the benzene ring was 0.5 to 0.5 part by mass with respect to the non-aqueous solvent. If the amount is less than 10 parts by mass, sufficient high-temperature cycle characteristics cannot be obtained because the film formed by being adsorbed on the surface of the negative electrode is coarse, and if the amount is more than 10 parts by mass. On the other hand, the film formed by being adsorbed on the negative electrode surface is excessively dense, and the electric resistance becomes excessive. For this reason, it is preferable that the amount of the compound to be added is 0.5 to 10 parts by mass relative to 100 parts by mass of the nonaqueous solvent.o
- the amount of the unsaturated cyclic carbonate derivative is less than 0.5 parts by mass, the film adsorbed on the surface of the negative electrode is coarse, so that a sufficient high-temperature site is required. If the crack characteristics cannot be obtained and the amount is more than 5 parts by mass, the film formed by being adsorbed on the negative electrode surface is too dense, and the electric resistance becomes too large. For this reason, it is preferable that the amount of the unsaturated cyclic carbonate derivative to be added is 0.5 to 10 parts by mass with respect to 100 parts by mass of the nonaqueous solvent. .
- the cycloalkylbenzen derivatives are not particularly limited, but for example, cyclopentylbenzen and cyclohexylbenzen are preferably used. Can be used. Also, the alkylpenzene derivative having a quaternary carbon directly bonded to the ⁇ e! Benzene ring is not particularly limited. For example, tert-butylbenzene Nitzen, tert-amylbenzen, and tert-hexylbenzen can be preferably used.
- the unsaturated cyclic carbonate derivative is not particularly limited, but, for example, a compound having a structure represented by the following formula 1 can be preferably used. it can .
- Rl and R2 each independently represent a hydrogen atom or an alkyl group having 6 or less carbon atoms.
- FIG. 1 is an exploded perspective view of the nonaqueous electrolyte secondary battery according to the present invention.
- FIG. 2 is an enlarged half-sectional view of the sealing body of the nonaqueous electrolyte secondary battery according to the present invention.
- reference numerals 1 in the figure are a positive electrode, 2 is a negative electrode, 3 is a palette, 4 is an electrode body, 4 is an electrode body, 5 is an outer can, 6 is a sealing body, 7 is a terminal cap, 8 Is an explosion-proof valve, 9 is a sealing plate, 10 is a positive current collecting tab, 11 is a negative current collecting tab, 12 is a PCT element, 13 is a gasket, and 13a is an external gasket. , 13b are internal gaskets, 14 and 15 are insulating plates, 16 is caulking, ⁇ , 18 is a gas vent hole, 19 is an inside of a sealing body, 20 is a battery main body.
- FIG. 1 is an exploded perspective view of a nonaqueous electrolyte battery according to an embodiment of the present invention
- FIG. 2 is an enlarged half-sectional view of a current cutoff sealing body provided at an opening of an outer can of FIG. is there .
- the lithium ion battery according to an example of the present invention has a cylindrical outer can 5 with a bottom, and the outer can 5 has an aluminum can inside.
- a spiral electrode body 4 composed of a negative electrode 2 on which a layer is formed, and a sensor 3 separating the two electrodes 1 and 2 is housed.
- a mixed solvent in which ethylene carbonate (EC) and getylcapone carbonate (DEC) are mixed at a mass ratio of 4: 6 is provided in the outer can 5.
- a sealing body 6 is formed at the opening of the outer can 5 through an insulating external gasket 13a made of polypropylene (PP).
- the battery is tightly fixed, and the battery is sealed by the sealing body 6.
- the sealing body 6 has a sealing plate 9 made of an aluminum alloy.
- the sealing plate 9 is also provided with an insulating inner gasket 13b made of polypropylene (PP) via an aluminum tube having a substantially semi-spherical center.
- Explosion-proof valve 8 made of nickel alloy and PTC The element 12 and the terminal cap 7 provided with the gas vent hole 18 are firmly fixed.
- the explosion-proof valve 8 is connected to the inside 19 of the sealing body and the battery
- the battery 20 (the part in which the electrode body 4 is stored), which is electrically connected to the sealing plate 9 in a normal state.
- the internal pressure of the battery always becomes equal to or higher than the predetermined value, the battery is separated from the sealing plate 9 by the internal pressure of the battery, whereby the charging is stopped.
- the outer can 5 is connected to a negative electrode current collecting tab 11 electrically connected to the negative electrode 2, while the sealing plate 9 of the sealing body 6 is connected to a positive electrode current collecting tab 11. 10 is connected, so that the chemical energy generated in the battery can be extracted to the outside as electric energy. Further, insulating plates 14 and 15 for preventing a short circuit in the battery are arranged near the upper and lower ends of the electrode body 4.
- the electrolyte solution contains a cycloalkyl benzene derivative and a cycloalkyl group having a quaternary carbon directly bonded to the benzene ring and directly bonding to the benzene ring.
- Alkyl benzene derivatives which do not have are added.
- the negative electrode material natural graphite, carbon black, coke, glassy carbon, carbon fiber, or a carbonaceous material such as a fired body of these materials Or one selected from the group consisting of the carbonaceous material and a metal oxide capable of occluding and releasing lithium, lithium alloy, and lithium. Mixtures of the above can be used.
- a lithium-containing transition metal composite oxide can be used alone, or a mixture of two or more thereof can be used. Specific examples include kono, lithium -ruthenate, lithium nickelate, lithium manganate, lithium ferrate, or any of these. An oxide in which part of the transition metal contained in the oxide is replaced with another element can be used.
- Non-aqueous solvents used in the rcm solution include ethylene carbonate, propylene carbonate, butylene carbonate, and carbylactone.
- high dielectric constant solvents having high solubility of lithium salts such as getyl carbonate, dimethyl carbonate, ethyl methyl carbonate, 1,2-dimethyxane, Tetrahydrofuran, anisol, 1,4-dioxane, 4—methyl-2-pentyl, cyclohexanone, acetony Tolyl, propionitol, dimethylformamide, sulfolane, methyl formate, ethyl formate, methyl acetate, ethyl acetate, propyl acetate, ethyl propionate, etc.
- a high dielectric constant solvent and a low viscosity solvent may each be a mixed solvent of two or more kinds.
- L i N C 2 F s S 0 2 either alone 3 ⁇ 4, L i ⁇ (CF 3 S 0 2) have L i CIO have L i PF have L i BF, etc. And can be used as a mixture of two or more.
- the amount of these electrolyte salts dissolved in the non-aqueous solvent is preferably 0.5 to 2.0 mol / L.
- the material of the sealing plate 9 is not limited to the above-mentioned aluminum alloy, but may be metal aluminum, iron, stainless steel, or the like. You can do it. Next, the content of the present invention will be described more specifically with reference to examples.
- Example 1 Co was prepared engagement Ru nonaqueous electrolyte secondary battery was earthenware pots good follows Bruno Le preparative acid Li Ji U beam (L i C o 0 2) or we name Ru electrode active material 9 2 Weight Part, a carbon-based conductive agent composed of acetylene black, 5 parts by mass, and a binder composed of polyvinylidene fluoride (PVdF), 3 parts by mass When , , , Eight ,
- NMP Pyrrolidone
- This active material slurry is uniformly applied to both sides of a positive electrode core made of aluminum foil with a thickness of 2 using a doctor blade, and then dried in a dryer. And dried. By this drying, the organic solvent required at the time of slurry preparation was removed. Next, this electrode plate was rolled by a roll press machine to a thickness of 0.17 mm to produce a positive electrode 1.
- a negative electrode active material made of graphite, and polyvinylidene fluoride (PVdF) 5 parts by mass of a binder and N-methyl, —
- NMP 2-lipidone
- This slurry of active material was uniformly applied to both sides of a negative electrode core made of copper foil with a thickness of 20 m using a Doc Even Blade, and then passed through a dryer. Allowed to pass and dried. By this drying, the organic solvent required at the time of slurry preparation was removed. Next, this electrode plate was rolled by a nozzle press so as to have a thickness of 0.14 mm, whereby a negative electrode 2 was produced.
- a mixed solvent obtained by mixing, 1 L i PF e as the electrolyte salt M (Mol-Z liters), dissolved in cyclohexylbenzene (CHB) 1 part by weight, tert-amylbenzen (t-AB) 2 parts by weight was added to prepare an electrolyte solution.
- the positive electrode 1 and the negative electrode 2 are wound through a polyethylene layer 3 (thickness: 25 mm) made of a polystyrene microporous membrane to produce an electrode body 4.
- the electrode body 4 was inserted into the outer can 5 together with the insulating plate 14, and the negative electrode current collector 11 was further welded to the bottom of the outer can 5.
- Example 2 A battery A2 of the present invention according to Example 2 was prepared in the same manner as in Example 1 except that the addition amount of xylbenzene was 0.5 parts by mass. did .
- Battery A3 of the present invention according to Example 3 was produced in the same manner as in Example 1 except that the addition amount of cyclohexylbenzene was 5 parts by mass.
- a battery A4 of the present invention according to Example 4 was produced in the same manner as in Example 1 except that the addition amount of cyclohexylbenzene was changed to 6 parts by mass.
- a battery A5 of the present invention according to Example 5 was produced in the same manner as in Example 1 except that the addition amount of tert-amylbenzene was 0.5 parts by mass.
- Example 6 The addition amount of tert-amylbenzene was 0.5 parts by mass.
- a battery A6 of the present invention according to Example 6 was produced in the same manner as in Example 1 except that the addition amount of tert-amylbenzen was changed to 10 parts by mass.
- a battery A7 of the present invention according to Example 7 was produced in the same manner as in Example 1 except that the addition amount of t ert —amylbenzen was changed to 12 parts by mass.
- a battery A8 of the present invention according to Example 8 was produced in the same manner as Example 1 described above, except that vinylene carbonate (VC) was further added.
- VC vinylene carbonate
- a battery A9 of the present invention according to Example 9 was produced in the same manner as in Example 8 except that the addition amount of cyclohexylbenzene was 0.5 parts by mass.
- a battery A10 of the present invention according to Example 10 was produced in the same manner as in Example 8 except that the addition amount of hexylbenzene was set to 5 parts by mass. Was.
- Example 11 A battery A11 of the present invention according to Example 11 was produced in the same manner as in Example 8 except that the addition amount of cyclohexylbenzene was 6 parts by mass. did .
- a battery A12 of the present invention according to Example 2 was made in the same manner as in Example 8 except that the addition amount of tert-amylbenzen was set to 0.5 parts by mass. . (Example 13)
- a battery A13 of the present invention according to Example 13 was produced in the same manner as in Example 8 except that the addition amount of tert-amylbenzen was changed to 10 parts by mass.
- a battery A14 of the present invention according to Example 14 was produced in the same manner as in Example 8 except that the amount of tert-amylbenzene added was changed to 11 parts by mass.
- a comparative battery X1 according to Comparative Example 1 was produced in the same manner as in Example 1 except that no additive was added.
- a comparative battery X2 according to Comparative Example 2 was produced in the same manner as in Example 1 except that tert-amylbenzen was not added. (Comparative Example 3)
- Comparative Example 3 was prepared in the same manner as in Example 1 except that tert-amylbenzen was not added and the amount of cyclohexylbenzene was changed to 2 parts by mass. A related comparative battery X3 was produced.
- Comparative Battery X4 according to Comparative Example 4 was produced in the same manner as in Example 1 except that cyclohexylbenzen was not added. (Comparative Example 5)
- Comparative Battery X5 according to Comparative Example 5 was produced.
- a comparative example was prepared in the same manner as in Example 1 except that 2 parts by mass of cumene was added without adding cyclohexylbenzene and ter-p-amylbenzene. Comparative battery X6 related to No. 6 was produced. (Comparative Example 7)
- Example 1 was repeated except that cyclohexylbenzene and tert-amylbenzene were not added and 2 parts by mass of trimellitate was added. As a result, a comparative battery X7 according to Comparative Example 7 was produced. (Comparative Example 8)
- a comparative battery X8 according to Comparative Example 8 was produced in the same manner as in Example 1 except that 1 part by mass of vinylene and a carbonate were added.
- the batteries A1 to A14 of the present invention and the comparative batteries X1 to X8 prepared as described above were subjected to an overcharge test and a high-temperature cycle test under the following conditions.
- High-temperature cycle characteristic capacity retention rate (%): (300 cycle discharge capacity / 1 cycle discharge capacity) XI 00 Type and amount of additive, and current interruption in overcharge test
- Table 1 shows the time required for the seal to operate, the maximum temperature outside the battery, and the results of the high-temperature cycle test.
- t-AB t e rt—amyl penzen (quaternary bond directly to benzene ring
- Table 1 shows that the cycloalkylbenzene derivative (CHB) and the alkylbenzene derivative (t-AB) having a quaternary carbon directly bonded to the benzene ring
- the high-temperature cycle characteristics 50% or more and the overcharge prevention effect (current interruption time of 19 minutes or less, maximum temperature of 82 ° C It can be seen that a battery having the following is obtained. I do.
- Cycloalkyl benzene derivatives have high reactivity of hydrogen atoms bonded to the ⁇ -carbon (carbon directly bonded to the benzene ring) of a cycloalkyl group, and this compound is used during overcharge. Hydrogen is easily extracted. As a result, during overcharging, the cycloalkyl benzene derivative is rapidly decomposed at the negative electrode to generate hydrogen gas, and is itself polymerized to form a negative electrode surface. A stable film is formed. Since this film has a large resistance, overcharging is suppressed.
- the responsiveness of the current interrupter increases because the hydrogen: gas generated by the decomposition of the alkyl benzene derivative increases the internal pressure of the battery. .
- the alkylbenzene derivative having a quaternary carbon directly bonded to the benzene ring is adsorbed on the negative electrode surface to form a film, and the above-described alkyl-alkylbenzene derivative described above is formed. Do not touch the negative electrode directly.
- the decomposition of the cycloalkylbenzene derivative at a high temperature is suppressed, so that the high-temperature cycle characteristics are prevented from deteriorating.
- good cycle characteristics and an overcharge prevention effect can be obtained.
- the battery X1 without additives, the quaternary that binds directly to the benzene ring
- batteries such as smoke were used. An error has occurred.
- the high-temperature cycle characteristic of the battery X7 was 54% or less, which was lower than that of the battery X1 without the additive. I understand.
- the addition amount of the cycloalkylbenzen derivative was 0.5 mass with respect to 100 mass parts of the nonaqueous solvent. If the amount is not less than 5 parts by mass and not more than 5 parts by mass, in a battery to which unsaturated cyclic carbonate is not added, the high-temperature cycle characteristics are 58% or more and the unsaturated cyclic carbonate is not added. In the battery to which the additive is added, excellent battery characteristics with a high-temperature cycle characteristic of 80% or more can be obtained. Therefore, it is preferable that the amount of the cycloalkylbenzen derivative to be added is regulated within the above range.
- the addition amount of the alkylbenzene derivative having a quaternary carbon directly bonded to the ring is 0.5 to 10 parts by mass relative to 100 parts by mass of the nonaqueous solvent.
- a battery having a high-temperature cycle characteristic of 58% or more and an unsaturated cyclic carbonate to which no unsaturated carbonate is added In this case, excellent battery characteristics with a high-temperature cycle characteristic of 80% or more can be obtained. Therefore, it is preferable that the addition amount of the alkylbenzen derivative having a quaternary carbon directly bonded to the benzene ring is regulated within the above range.
- a cylindrical battery was manufactured.
- the present invention is not limited to this shape, but may be applied to various types such as a coin type, a square type, and a laminated battery. It can be used for batteries of different shapes. It can also be used for gelled non-aqueous electrolyte secondary batteries using polymer electrolytes.
- a battery having a current interrupting device is manufactured.
- the present invention can be used for a battery having no current interrupting device. In this case, the cycloalkylbenzene derivative decomposes during overcharge, forming a large coating on the pile and generating hydrogen gas, increasing the internal resistance. Thus, overcharging can be prevented.
- the cycloalkyl benzene derivative is cyclohexyl benzene, an alkyl benzene having a quaternary carbon directly bonded to the benzene ring.
- a battery using tert-amylbenzene as a derivative was prepared, but the present invention is not limited to the above compound.
- cycloalkyl benzene derivatives include cyclopentyl benzene, alkyl benzene derivatives having a quaternary carbon directly bonded to the benzene ring, and cycloalkyl benzene derivatives.
- the nonaqueous electrolyte battery according to the present invention has excellent high-temperature cycle characteristics, and has excellent safety such that no battery abnormality occurs even when overcharged. Therefore, industrial applicability is high.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/509,756 US7604901B2 (en) | 2002-06-21 | 2003-06-23 | Nonaqueous electrolyte secondary battery |
KR1020047012891A KR100959449B1 (ko) | 2002-06-21 | 2003-06-23 | 비수전해질 이차전지 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002-182128 | 2002-06-21 | ||
JP2002182128A JP4056302B2 (ja) | 2002-06-21 | 2002-06-21 | 非水電解質二次電池 |
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WO2004001889A1 true WO2004001889A1 (ja) | 2003-12-31 |
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PCT/JP2003/007944 WO2004001889A1 (ja) | 2002-06-21 | 2003-06-23 | 非水電解質二次電池 |
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US (1) | US7604901B2 (ja) |
JP (1) | JP4056302B2 (ja) |
KR (1) | KR100959449B1 (ja) |
CN (1) | CN1320688C (ja) |
WO (1) | WO2004001889A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007045162A1 (fr) | 2005-10-18 | 2007-04-26 | Byd Company Limited | Melange d’additifs de l’electrolyte de batteries secondaires au lithium et l’electrolyte de batteries secondaires au lithium comprenant ledit melange d’additifs |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
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US20080193852A1 (en) * | 2006-02-03 | 2008-08-14 | Sanyo Electric Co., Ltd. | Nonaqueous Electrolyte Secondary Battery |
JP5084164B2 (ja) * | 2006-03-29 | 2012-11-28 | 株式会社デンソー | 非水電解液および該電解液を用いた二次電池 |
JP5207631B2 (ja) * | 2007-01-31 | 2013-06-12 | 三洋電機株式会社 | 非水電解質二次電池 |
JP5235405B2 (ja) | 2007-12-28 | 2013-07-10 | 三洋電機株式会社 | 非水電解質二次電池 |
KR101802342B1 (ko) * | 2008-11-13 | 2017-11-28 | 삼성에스디아이 주식회사 | 유기전해액 및 이를 채용한 리튬전지 |
JP2010176996A (ja) * | 2009-01-28 | 2010-08-12 | Sanyo Electric Co Ltd | 非水電解質二次電池 |
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Also Published As
Publication number | Publication date |
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JP2004030991A (ja) | 2004-01-29 |
KR100959449B1 (ko) | 2010-05-25 |
CN1663071A (zh) | 2005-08-31 |
CN1320688C (zh) | 2007-06-06 |
KR20050010755A (ko) | 2005-01-28 |
US7604901B2 (en) | 2009-10-20 |
US20060166102A1 (en) | 2006-07-27 |
JP4056302B2 (ja) | 2008-03-05 |
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