Patent application number | Description | Published |
20080315161 | Electrochemical Device-Oriented Electrode Material and Production Method Thereof , as Well as Electrochemical Device-Oriented Electrode and Electochemical Device - It is an object of the present invention to provide an electrochemical device adopting lithium titanate as an active material and having a sufficient output characteristic. It is another object of the present invention to provide a production method of an electrode material, an electrode, and a production method of the electrode material, to be used for the device. | 12-25-2008 |
20090236564 | MIXED MATERIAL OF LITHIUM IRON PHOSPHATE AND CARBON, ELECTRODE CONTAINING SAME, BATTERY COMPRISING SUCH ELECTRODE, METHOD FOR PRODUCING SUCH MIXED MATERIAL, AND METHOD FOR PRODUCING BATTERY - Disclosed is a mixed material of lithium iron phosphate and carbon, which contains secondary particles as aggregates of lithium iron phosphate primary particles and a fibrous carbon which is present inside the secondary particles. An electrode containing such a mixed material, a battery comprising such an electrode, a method for producing such a mixed material, and a method for producing a battery are also disclosed. | 09-24-2009 |
20090246604 | Non-Aqueous Electrolyte Battery, Method of Manufacturing the Same and Method of Using the Same - A non-aqueous electrolyte battery suppresses gas generation in a non-aqueous electrolyte battery having a negative active material that intercalates and deintercalates lithium ions at a potential not lower than 1.2 V relative to the potential of lithium for the negative electrode thereof. The non-aqueous electrolyte battery comprises a non-aqueous electrolyte containing an electrolytic salt and a non-aqueous solvent, a positive electrode and a negative electrode having a negative active material that intercalates/deintercalates lithium ions at a potential not lower than 1.2 V relative to the potential of lithium and is characterized in that a film coat having a carbonate structure and a thickness of not less than 10 nm exists on the surface of said negative electrode and that the non-aqueous electrolyte battery is operated in a region of potential of the negative electrode higher than 0.8 V relative to the potential of lithium. A method of manufacturing a non-aqueous electrolyte battery having a non-aqueous electrolyte, a positive electrode and a negative electrode having a negative active material that intercalates/deintercalates lithium ions at a potential not lower than 1.2 V relative to the potential of lithium is characterized in that a film coat having a carbonate structure is brought into existence on the surface of said negative electrode by lowering the potential of the negative electrode to lower than 0.8 V relative to the potential of lithium at least once in an initial cycle. | 10-01-2009 |
20090269668 | Active Material for Lithium Ion Battery Having Mg-Containing Lithium Titanate and Lithium Ion Battery - It is an object of the present invention to provide an active material for lithium ion battery having an excellent discharge capacity in the potential flat part and a high-performance and long-life lithium ion battery, and particularly to provide a technology of improving voltage flatness. | 10-29-2009 |
20090286160 | Non-Aqueous Electrolyte Battery and Method of Manufacturing the Same - Gas generation of a non-aqueous electrolyte battery having a negative active material that intercalates/deintercalates lithium ions at a potential not lower than 1.2 V relative to the potential of lithium as negative electrode is suppressed. | 11-19-2009 |
20100178570 | Nonaqueous electrolytic cell and its manufacturing method - The invention aims to suppress gas generation in a nonaqueous electrolytic cell having a negative electrode containing negative active material such as lithium titanate and particularly suppress swelling in a nonaqueous electrolytic cell by suppressing gas generation at the time of storage at a high temperature. The nonaqueous electrolytic cell comprises a nonaqueous electrolyte containing an electrolytic salt and a nonaqueous solvent, a positive electrode, and a negative electrode containing a negative electrode material into/from which lithium ions are inserted/extracted at a potential higher than the lithium potential by 1.2 V. The nonaqueous electrolytic cell is characterized in that the nonaqueous electrolyte contains vinylene carbonate, the negative electrode has a coat thereon, and the nonaqueous electrolytic cell is used in a range of negative electrode potential nobler than the lithium potential by 0.8 V. A nonaqueous electrolytic cell manufacturing method is characterized in that a nonaqueous electrolyte containing vinylene carbonate is used, the initial charge-discharge is carried out under a condition that the negative potential in the completed charged state exceeds the lithium potential by 0.8 V, a coat is formed on the surface of the negative electrode or a coat is formed on the surface of the negative electrode at the initial charge-discharge in such a way at least once, the negative potential is lowered below the lithium potential by 0.4 V. | 07-15-2010 |
20100233542 | ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, LITHIUM SECONDARY BATTERY, AND METHOD FOR PRODUCING THE SAME - The present invention provides an active material for a lithium secondary battery with a high discharge capacity, particularly for a lithium secondary battery that can increase the discharge capacity in a potential region of 4.3 V or lower, a method for producing the same, a lithium secondary battery having a high discharge capacity, and a method for producing the same. The active material for a lithium secondary battery includes a solid solution of a lithium transition metal composite oxide having an α-NaFeO | 09-16-2010 |
20110027663 | NONAQUEOUS ELECTROLYTE BATTERY - An additive typified by tris(trimethylsilyl)phosphate, tris(trimethylsilyl)borate, and tetrakis(trimethylsiloxy)titanium (Chem. 3) are applied to a nonaqueous electrolyte containing a chain carbonate and/or a chain carboxylate as a main solvent (contained at a ratio of 70 volume % or higher). It is preferable that 0≦a<30 is satisfied, in which “a” denotes the volume of a cyclic carbonate among carbonates having no carbon-carbon double bond in the entire volume, defined as 100, of the carbonates having no carbon-carbon double bond and chain carboxylates in a nonaqueous solvent contained in the nonaqueous electrolyte (0 | 02-03-2011 |
20110068293 | POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY - The invention provides a polyanion-based positive active material which can improve storage stability (especially, high temperature storage stability), charge and discharge cycle performance and the like of a lithium secondary battery, and a lithium secondary battery using the same. The positive active material for a lithium ion secondary battery contains lithium iron cobalt phosphate represented by the general formula: Li | 03-24-2011 |
20110274975 | POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY - It is an object of the present invention to provide a positive electrode material having a large ratio of the discharge capacity around 4 V to the total discharge capacity including the discharge capacity at 4V or lower while making the discharge capacity around 4 V sufficient, for the purpose of providing a lithium secondary battery using a lithium transition metal phosphate compound excellent in thermal stability, utilizing the discharge potential around 4V (vs. Li/Li | 11-10-2011 |
20120028122 | POSITIVE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY - The positive active material is a positive active material for a lithium secondary battery, including a lithium transition metal compound that has an olivine crystal structure and contains at least Ni, Fe, and Mn as transition metal elements, wherein when the sum of mole atoms of Ni, Fe, and Mn of transition metal elements contained in the lithium transition metal compound is expressed as 1, and the mole atomic ratios of Ni, Fe, and Mn are represented by a, b, and c (a+b+c=1, a>0, b>0, c>0), respectively, the following is satisfied: 0.85≦c≦0.92 and 0.3≦a/(a+b)≦0.9. | 02-02-2012 |
20120301759 | ELECTRIC STORAGE DEVICE AND INSULATION COVER - An electric storage device includes: an electrode assembly including a positive electrode sheet, a negative electrode sheet, and a separator for insulating between the electrode sheets; positive and negative current collectors disposed on both ends of the electrode assembly; a case in which the electrode assembly and the current collectors are housed and that fixes one ends of the positive and negative current collectors; and a support member extending from the positive current collector to the negative current collector. | 11-29-2012 |
20120308893 | POSITIVE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - An object is to provide a positive active material for nonaqueous electrolyte secondary battery, which is capable of providing a battery with excellent cycle performance. Provided are a positive active material for nonaqueous electrolyte secondary battery, which includes an Fe-containing lithium vanadium phosphate compound having a NASICON-type structure, wherein in the Fe-containing lithium vanadium phosphate compound, the percentage of iron atoms relative to the sum of vanadium and iron atoms is 2% or more and 20% or less; and the like. | 12-06-2012 |
20140170444 | RUBBER VALVE BODY FOR SEALED BATTERY, SAFETY VALVE DEVICE AND ALKALINE STORAGE BATTERY - A rubber valve body for sealed battery includes a rubber composition containing a resin in an amount of 20% by mass or more and an inorganic substance, wherein the melting point of the resin is in a range of 100 to 165° C. | 06-19-2014 |
20140322577 | ENERGY STORAGE DEVICE WITH SPIRAL ELECTRODE GROUP - An energy storage device including a spiral electrode group in which a first electrode plate and a second electrode plate having polarity reverse to that of the first electrode plate are spirally wound with a separator interposed therebetween, wherein the second electrode plate is opposed to an inner circumference and an outer circumference of the first electrode plate, portions of the separator are reinforced, the reinforced portions of the separator include a first reinforced portion formed between a winding-start end of the first electrode plate and the second electrode plate located on a radially outer side of the winding-start end, and a second reinforced portion formed between the winding-start end of the first electrode plate and the second electrode plate located on a radially inner side of the winding-start end, and the first reinforced portion and the second reinforced portion are arranged apart from each other. | 10-30-2014 |