Patent application number | Description | Published |
20080199773 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolyte secondary battery, comprising a positive electrode having a positive-electrode active material layer reversibly inserting and extracting lithium ions on a positive-electrode current collector, a negative electrode having a negative-electrode active material layer reversibly inserting and extracting lithium ions on a negative-electrode current collector, and a nonaqueous electrolyte solution, wherein at least one of the positive and negative electrodes has a film on the surface and at least one of the positive electrode, the negative electrode and the nonaqueous electrolyte solution contains a nitrogen-containing cyclic compound. Such a nonaqueous electrolyte secondary battery is superior in high-temperature storage stability allowing preservation of favorable discharge rate even after high-temperature storage. | 08-21-2008 |
20080254363 | Electrochemical energy storage device - The present invention provides an electrochemical energy storage device comprising a positive electrode, a negative electrode, and a non-aqueous electrolytic solution containing an ammonium salt, wherein the negative electrode potential upon completion of charging is set to less than 1.8 V and 0.1 V or more relative to a lithium reference in which high electric capacity is obtained and a reductive decomposition reaction of the ammonium salt on the negative electrode is avoided, and thus efficiency upon every charging and discharging cycle is improved, resulting in a long cycle life. | 10-16-2008 |
20080306308 | PROCESS FOR PREPARING FLUORINE-CONTAINING ALKOXYALKANE - A process for preparing a fluorine-containing alkoxyalkane represented by the general formula (1) R | 12-11-2008 |
20090087740 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - The invention intends to provide a high-capacity type non-aqueous electrolyte secondary battery that includes a nickel-containing lithium composite oxide as a positive electrode active material and exhibits good charge/discharge cycle characteristics even under a high temperature environment. | 04-02-2009 |
20090169999 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including a nickel-containing lithium composite oxide as a positive electrode active material, a negative electrode, a separator interposed between the positive electrode and the negative electrode. The separator includes at least one selected from the group consisting of a layer including a polymer of a monomer containing halogen atoms but not containing a hydrogen atom and a layer including an inorganic oxide. | 07-02-2009 |
20090176164 | Electrochemical Energy Storage Device - An electrochemical energy storage device includes a negative electrode which contains a carbon material and has a negative electrode potential of 1.4 V or less relative to a lithium reference when being charged, and a non-aqueous electrolyte solution prepared by dissolving a lithium salt, an ammonium salt, and at least one kind of fluorinated benzene selected among hexafluorobenzene, pentafluorobenzene, 1,2,3,4-tetrafluorobenzene, 1,2,3,5-tetrafluorobenzene, 1,2,4,5-tetrafluorobenzene and 1,2,3-trifluorobenzene, in a non-aqueous solvent. | 07-09-2009 |
20090246641 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including an active material absorbing and desorbing lithium ions, a negative electrode including an active material absorbing and desorbing lithium ions, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The separator includes a material containing a substituent group with electron-withdrawing property. The non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved therein, and the non-aqueous solvent includes at least one selected from the group consisting of a fluorine-containing aromatic solvent, a fluorine-containing cyclic carbonic acid ester, and a fluorine-containing cyclic carboxylic acid ester. | 10-01-2009 |
20100015533 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery including: a positive electrode that contains a transition metal oxide capable of absorbing and desorbing lithium ions; a negative electrode that is capable of absorbing and desorbing lithium ions; a porous film that is interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte, wherein at least one selected from inorganic oxide and polyamide is contained in the porous film, and 5 to 15 vol % of ethylene carbonate is contained in a non-aqueous solvent that is contained in the non-aqueous electrolyte. | 01-21-2010 |
20100068613 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte secondary battery includes: a positive electrode including a transition metal oxide capable of absorbing and desorbing lithium ions; a negative electrode capable of absorbing and desorbing lithium ions; a separator; and a non-aqueous electrolyte. A polyamide film or a porous film containing an inorganic oxide is disposed at least between the positive electrode and the negative electrode, and an unsaturated sultone is added to the non-aqueous electrolyte. This can suppress deterioration in the rate characteristics of the non-aqueous electrolyte secondary battery after storage at a high temperature and improve the storage characteristics of the battery, while maintaining the initial rate characteristics of the battery. | 03-18-2010 |
20110008673 | NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - In a non-aqueous electrolyte secondary battery | 01-13-2011 |
20110039155 | METHOD FOR PRODUCING POSITIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - An object of the invention is to inhibit the entry of LiOH and Li | 02-17-2011 |
20110039163 | NON-AQUEOUS ELECTROLYTE AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME - Provided is a non-aqueous electrolyte capable of favorably suppressing the gas generation during storage in a high temperature environment and during charge/discharge cycling of a non-aqueous electrolyte secondary battery. The non-aqueous electrolyte includes a non-aqueous solvent and a solute dissolved in the non-aqueous solvent, wherein: the non-aqueous solvent includes ethylene carbonate, propylene carbonate, diethyl carbonate, and an additive; the additive includes a sultone compound and a cyclic carbonate having a C═C unsaturated bond; a weight percentage W | 02-17-2011 |
20110045360 | LITHIUM ION SECONDARY BATTERY AND METHOD FOR PRODUCING LITHIUM ION SECONDARY BATTERY - The invention relates to a lithium ion secondary battery including: a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a non-aqueous solvent including a fluoroether, the positive electrode includes a positive electrode current collector and a positive electrode active material layer formed on the surface of the positive electrode current collector, the positive electrode active material layer includes lithium-containing composite oxide particles and a fluororesin, and a coverage of the fluororesin relative to the surface area of the lithium-containing composite oxide particles is 20 to 65%. It is an object of the invention to provide a lithium ion secondary battery that is kept from deteriorating in rate characteristics over time, in particular, from significantly deteriorating in rate characteristics during storage at high temperatures. | 02-24-2011 |
20110053003 | LITHIUM ION SECONDARY BATTERY AND METHOD FOR PRODUCING LITHIUM ION SECONDARY BATTERY - The invention relates to a lithium ion secondary battery including: a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a non-aqueous solvent including a sulfone compound, the positive electrode includes a positive electrode current collector and a positive electrode active material layer formed on the surface of the positive electrode current collector, the positive electrode active material layer includes lithium-containing composite oxide particles and a fluorocarbon resin, and a coverage of the fluorocarbon resin relative to the surface area of the lithium-containing composite oxide particles is 20 to 65%. It is an object of the invention to provide a lithium ion secondary battery that is kept from deteriorating in rate characteristics over time, in particular, from significantly deteriorating in rate characteristics during storage at high temperatures. | 03-03-2011 |
20110070497 | METHOD OF PRODUCING POSITIVE ELECTRODE FOR LITHIUM ION BATTERY, POSITIVE ELECTRODE FOR LITHIUM ION BATTERY, AND LITHIUM ION BATTERY USING THE POSITIVE ELECTRODE - A positive electrode for a lithium ion battery having a positive electrode active material layer including a lithium transition metal oxide such as a lithium nickel oxide as a positive electrode active material is washed with a washing fluid containing: an aprotic solvent such as propylene carbonate; and at least one of a fluorine-containing lithium salt such as LiPF | 03-24-2011 |
20110117437 | POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR FABRICATING THE SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - The invention provides a positive electrode for a nonaqueous electrolyte secondary battery which is capable of alleviating generation of gas during charge/discharge with a nonaqueous electrolyte solution penetrated therein, and a method for fabricating the same. | 05-19-2011 |
20110181249 | CHARGING METHOD AND CHARGER FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - In a charging method for a non-aqueous electrolyte secondary battery which comprises a positive electrode including a lithium-containing composite oxide as an active material, a negative electrode including a material capable of charging and discharging lithium ions as an active material, and a non-aqueous electrolyte, an open circuit voltage of the secondary battery is detected. When the detected value is smaller than a predetermined voltage x, charging is performed at a comparatively small current value B. When the detected value is equal to or greater than the predetermined voltage x and smaller than a predetermined voltage z, charging is performed at a comparatively great current value A. When the detected value is equal to or greater than the predetermined voltage z and smaller than a predetermined voltage y, charging is performed at a comparatively small current value C. When the detected value is greater than the predetermined voltage y, constant-voltage charging is performed or charging is terminated. Here, x07-28-2011 | |
20110200886 | NON-AQUEOUS ELECTROLYTE AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME - A non-aqueous electrolyte including a non-aqueous solvent and a solute dissolved in the non-aqueous solvent. The non-aqueous solvent includes ethylene carbonate, propylene carbonate, diethyl carbonate, and a first additive. The weight percentage W | 08-18-2011 |
20120107700 | NON-AQUEOUS ELECTROLYTE AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME - In view of suppressing gas production during storage at high temperatures and during charge and discharge cycles while ensuring favorable low-temperature characteristics, the invention aims to provide a non-aqueous electrolyte in which the proportion of diethyl carbonate is reduced, and a non-aqueous electrolyte secondary battery using the same that has high safety. The non-aqueous electrolyte of the invention for use in secondary batteries includes ethylene carbonate, propylene carbonate, diethyl carbonate, and an additive, as a non-aqueous solvent. The additive is at least one of a fluorinated aromatic compound having a molecular weight of 90 to 200 and a fatty acid alkyl ester having a molecular weight of 80 to 240. A weight ratio W | 05-03-2012 |
20120183865 | NON-AQUEOUS ELECTROLYTE FOR SECONDARY BATTERIES AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - The non-aqueous electrolyte for secondary batteries includes a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent. The non-aqueous solvent includes a fluorine-containing cyclic carbonate, propylene carbonate, and diethyl carbonate. The content W | 07-19-2012 |
20130017455 | NON-AQUEOUS ELECTROLYTE AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAMEAANM Deguchi; MasakiAACI HyogoAACO JPAAGP Deguchi; Masaki Hyogo JPAANM Kasamatsu; ShinjiAACI HyogoAACO JPAAGP Kasamatsu; Shinji Hyogo JP - Disclosed is a non-aqueous electrolyte including a non-aqueous solvent, and a solute dissolved in the non-aqueous solvent. The non-aqueous solvent contains ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), and an additive. The weight percentage W | 01-17-2013 |
20130288085 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME - Disclosed is a non-aqueous electrolyte secondary battery including a positive electrode including a lithium-containing transition metal composite oxide as a positive electrode active material, a negative electrode including a negative electrode active material, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte. The positive electrode contains lithium carbonate and lithium hydrogencarbonate in a total amount of 500 ppm or more and 3000 ppm or less, and exhibits a weight loss by temperature increase from 25° C. to 300° C. at 5° C./min of 70% or less of the total amount and of 1500 ppm or less. The non-aqueous electrolyte includes a non-aqueous solvent and a lithium salt. The non-aqueous solvent may contain a cyclic carbonate and a chain carbonate. | 10-31-2013 |
20130302701 | NON-AQUEOUS ELECTROLYTE FOR SECONDARY BATTERIES AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - A non-aqueous electrolyte for secondary batteries comprising a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent, the non-aqueous solvent including ethylene carbonate, propylene carbonate, and a fluorinated aromatic compound having an alkynyl group, a content W | 11-14-2013 |
20130330636 | NONAQUEOUS ELECTROLYTE AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY USING SAME - The present invention provides a non-aqueous electrolyte for secondary batteries, capable of suppressing gas generation in the secondary batteries during storage in a high-temperature environment or during charge/discharge cycles; and also provides a non-aqueous electrolyte secondary battery using the same. The non-aqueous electrolyte includes a non-aqueous solvent, a solute dissolved in the non-aqueous solvent, and an additive. The non-aqueous solvent includes ethylene carbonate and propylene carbonate. In the non-aqueous solvent, a content W | 12-12-2013 |