| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 429342000 | Acyclic carbonate solvent | 29 |
| 20080299463 | Nonaqueous Electrolyte Secondary Battery - A nonaqueous electrolyte secondary battery that even at high-rate discharge wherein discharge is carried out at relatively large current, can attain an increase of discharge capacity. There is provided a nonaqueous electrolyte secondary battery comprising positive electrode ( | 12-04-2008 |
| 20080311481 | NONAQUEOUS ELECTROLYTE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTER USING THE SAME - A nonaqueous electrolyte for a lithium secondary battery and a lithium secondary battery including the same are provided. In particular, the nonaqueous electrolyte comprises a compound of chemical formula 1 as an electrolyte additive: | 12-18-2008 |
| 20090042104 | MULTI-COMPONENT COMPOSITE FILM METHOD FOR PREPARING THE SAME - The present invention provides a multi-component composite film comprising a) polymer support layer; and b) porous gellable polymer layer which is formed on one side or both sides of the support layer of a), wherein the support film of a) and the gellable polymer layer of b) are unified without the interface, a method for preparing the same, and a polymer electrolyte system applied the same. | 02-12-2009 |
| 20090081559 | Method for Producing Electrolyte Solution for Lithium Ion Battery and Battery Using Same - There is provided a method for producing an electrolyte solution for lithium ion battery, which is characterized in that lithium fluoride, lithium chloride, lithium bromide, lithium iodide or a mixture of any of these is reacted with phosphorus pentachloride and hydrogen fluoride in a nonaqueous organic solvent, when an electrolyte solution for lithium ion battery, which contains lithium hexafluorophosphate as an electrolyte, is produced. | 03-26-2009 |
| 20090123850 | METHOD FOR PRODUCING ANODE FOR LITHIUM SECONDARY BATTERY AND ANODE COMPOSITION, AND LITHIUM SECONDARY BATTERY - The invention relates to an anode for lithium secondary battery comprising vapor grown carbon fiber uniformly dispersed without forming an agglomerate of 10 μm or larger in an anode active material using natural graphite or artificial graphite, which anode is excellent in long cycle life and large current characteristics. Composition used for production for the anode can be produced, for example, by mixing a thickening agent solution containing an anode active material, a thickening agent aqueous solution and styrene butadiene rubber as binder with a composition containing carbon fiber dispersed in a thickening agent with a predetermined viscosity or by mixing an anode active material with vapor grown carbon fiber in dry state and then adding polyvinylidene difluoride thereto. | 05-14-2009 |
| 20090123851 | POSITIVE-ELECTRODE ACTIVE MATERIAL FOR LITHIUM-ION SECONDARY BATTERY, POSITIVE ELECTRODE, MANUFACTURING METHOD THEREOF, AND LITHIUM-ION SECONDARY BATTERY - A positive-electrode active material for a lithium-ion secondary battery has an average composition expressed by the following formula (1): | 05-14-2009 |
| 20090136854 | Lithium Ion Secondary Battery - The present invention intends to improve the intermittent cycle characteristics in a lithium ion secondary battery including, as a positive electrode active material, a lithium composite oxide mainly composed of nickel or cobalt. The present invention is a lithium ion secondary battery wherein the positive electrode includes active material particles including a lithium composite oxide. The lithium composite oxide is represented by the general formula (1): Li | 05-28-2009 |
| 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 |
| 20100040956 | POLYVINYLPYRIDINE ADDITIVES FOR NONAQUEOUS ELECTROLYTES ACTIVATING LITHIUM RECHARGEABLE ELECTROCHEMICAL CELLS - An electrolyte comprising an organic solvent, a lithium salt, and a polymer additive comprised of repeating vinyl units joined to one or more heterocyclic amine moieties is described. The heterocyclic amine contains five to ten ring atoms, inclusive. An electrochemical cell is also disclosed. The preferred cell comprises a negative electrode which intercalates with lithium, a positive electrode comprising an electrode active material which intercalates with lithium, and the electrolyte of the present invention activating the negative and the positive electrodes. | 02-18-2010 |
| 20100239919 | NONAQUEOUS ELECTROLYTE SOLUTION AND LITHIUM SECONDARY BATTERY USING SAME - The present invention provides a nonaqueous electrolytic solution exhibiting excellent battery characteristics such as electrical capacity, cycle property and storage property and capable of maintaining the battery characteristics for a long time, and a lithium secondary battery using the nonaqueous electrolytic solution. | 09-23-2010 |
| 20100248041 | NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, ELECTRODE AND CARBONACEOUS MATERIAL - The present invention provides a nonaqueous electrolyte secondary battery, an electrode and a carbonaceous material. The nonaqueous electrolyte secondary battery has an electrode containing a carbonaceous material obtained by a production method comprising a step of heating a compound of formula (1) or a calcination product of the compound, under an inert gas atmosphere in the range of from 200° C. to 3000° C.: | 09-30-2010 |
| 20100304225 | ELECTROLYTE FORMULATIONS FOR ENERGY STORAGE DEVICES BASED ON IONIC LIQUIDS - The invention relates to an electrolyte formulation comprising a) an ionic liquid which is electrochemically stable over a range of at least 4.5 V, has a viscosity of less than 300 mPa·s at 20° C. and has a conductivity of at least 1 mS/cm at 20° C., and b) an aprotic, dipolar solvent in an amount of 20 to 60% by volume based on the electrolyte formulation, wherein the conductivity of the electrolyte formulation is greater at least by a factor of 2 than the conductivity of the ionic liquid. | 12-02-2010 |
| 20110020713 | NANOWIRE BATTERY METHODS AND ARRANGEMENTS - A variety of methods and apparatus are implemented in connection with a battery. According to one such arrangement, an apparatus is provided for use in a battery in which ions are moved. The apparatus comprises a substrate and a plurality of growth-rooted nanowires. The growth-rooted nanowires extend from the substrate to interact with the ions. | 01-27-2011 |
| 20110053004 | POSITIVE ELECTRODE - According to one embodiment, a positive electrode includes a positive electrode layer and a positive electrode current collector. The positive electrode layer includes a positive electrode active material including a first oxide represented by the following formula (α) and/or a second oxide represented by the following formula (β). The positive electrode layer has an intensity ratio falling within a range of 0.25 to 0.7. The ratio is represented by the following formula (1) in an X-ray diffraction pattern obtained by using CuKα radiation for a surface of the positive electrode layer. | 03-03-2011 |
| 20110171540 | NON-AQUEOUS SOLVENT AND NON-AQUEOUS ELECTROLYTIC SOLUTION FOR ENERGY STORAGE DEVICE, AND ENERGY STORAGE DEVICE, LITHIUM SECONDARY BATTERY AND ELECTRIC DOUBLE-LAYER CAPACITOR EACH COMPRISING THE NON-AQUEOUS SOLVENT OR THE NON-AQUEOUS ELECTROLYTIC SOLUTION - A nonaqueous solvent for an electrical storage device according to the present invention includes fluorine-containing cyclic saturated hydrocarbon having a structure represented by the following general formula (1) in which one or two substituents R are introduced into a cyclohexane ring; a compound having a relative dielectric constant of 25 or higher; and a chain carbonate (in general formula (1), R is represented by C | 07-14-2011 |
| 20110183219 | Method for Producing Lithium Difluorobis (Oxalato) Phosphate Solution - Disclosed is a method for producing a lithium difluorobis(oxalato)phosphate solution, which is characterized by that lithium hexafluorophosphate and oxalic acid are mixed together in a nonaqueous solvent, in a manner that the molar ratio of lithium hexafluorophosphate to oxalic acid falls within a range of 1:1.90 to 1:2.10, and furthermore silicon tetrachloride is added to this, in a manner that the molar ratio of lithium hexafluorophosphate to silicon tetrachloride falls within a range of 1:0.95 to 1:1.10, thereby conducting a reaction. The lithium difluorobis(oxalato)phosphate solution produced by this method has low contents of chlorine compounds and free acids. Therefore, it can become an additive that is effective for improving performance of nonaqueous electrolyte batteries. | 07-28-2011 |
| 20110281181 | Non-aqueous Electrolyte secondary battery - The storage characteristics in a charged state are improved in a non-aqueous electrolyte secondary battery containing a lithium cobalt oxide as a positive electrode active material. The non-aqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material; a negative electrode containing a negative electrode active material other than metallic lithium; and a non-aqueous electrolyte. The positive electrode active material contains a lithium cobalt oxide as its main component. The non-aqueous electrolyte contains 0.1 to 10 volume % of a compound having an ether group. The positive electrode active material and the negative electrode active material are contained so that the charge capacity ratio of the negative electrode to the positive electrode is from 1.0 to 1.2 when the battery is charged until the potential of the positive electrode reaches 4.4 to 4.5 V (vs. Li/Li | 11-17-2011 |
| 20120028134 | LITHIUM SECONDARY BATTERY WITH IMPROVED ENERGY DENSITY - Provided is a lithium secondary battery with enhanced energy density including a cathode using a cathode active material containing lithium mixed transition metal oxide absorbing and discharging lithium ions, wherein a final discharge voltage is in the range of about 1.5 V to about 2.75 V. A final discharge voltage can be reduced to 1.5 V to 2.75 V from 3.0 V by using various lithium mixed transition metal oxides as a cathode active material, or by using the various lithium mixed transition metal oxides with the LCO-based cathode material mixed. Compared to typical LCO-based cathode materials of which capacity and energy density do not change even if a final discharge voltage is decreased, a cathode material of the present invention results in further improving capacity by 10-20% as the final discharge voltage is decreased. | 02-02-2012 |
| 20130022879 | NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SOLUTION FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY - Provided is a nonaqueous electrolyte secondary battery which, even in the case of using a low-viscosity solvent having a narrow potential window, can increase the electrochemical stability of the nonaqueous electrolyte solution and suppress side reactions of the nonaqueous electrolyte solution during charge and discharge to reduce the degradation of the battery characteristics and has an excellent storage characteristic in high-temperature environments and a nonaqueous electrolyte solution for the nonaqueous electrolyte secondary battery. The nonaqueous electrolyte secondary battery includes: a positive electrode containing a positive-electrode active material; a negative electrode containing a negative-electrode active material; and a nonaqueous electrolyte solution containing a solute dissolved in a nonaqueous solvent, wherein the nonaqueous electrolyte solution further contains benzotrifluoride and a diisocyanate compound and the content of benzotrifluoride is 5% by volume or more in the nonaqueous electrolyte solution except the solute. | 01-24-2013 |
| 20130078532 | NON-AQUEOUS ELECTROLYTES FOR LITHIUM ION BATTERIES - An electrolyte includes a lithium salt; a polar aprotic solvent; a primary redox shuttle; and a lithium borate cluster salt. The lithium borate cluster salt may be compound of formula Li | 03-28-2013 |
| 20130078533 | ELECTROLYTE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME - An electrolyte for a lithium secondary battery, the electrolyte including a lithium salt, a non-aqueous organic solvent, and a polar additive based on a substituted hetero-bicyclic compound. Oxidation of the electrolyte is prevented by formation of a polar thin film on a surface portion of the positive electrode, which facilitates transfer of lithium ions. The lithium secondary batteries using the electrolyte have excellent high temperature life characteristics and high temperature conservation characteristics. | 03-28-2013 |
| 20130089794 | RECHARGEABLE LITHIUM BATTERY - A rechargeable lithium battery includes a positive electrode, a negative electrode, a separator between the positive electrode and the negative electrode, a polymer layer on the separator, the polymer layer including a polyvinylidene fluoride based polymer, and an electrolyte solution including an alkyl propionate. | 04-11-2013 |
| 20130183590 | ELECTRODE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING SAME - An electrode for a lithium secondary battery, including a surface having surface roughness of about 800 nm to about 1000 nm, and a lithium secondary battery including the same. In one embodiment, the lithium secondary battery has improved cycle-life characteristics. | 07-18-2013 |
| 20140023938 | ELECTROCHEMICAL DEVICE AND NONAQUEOUS ELECTROLYTE SOLUTION FOR ELECTROCHEMCIAL DEVICE - The present invention aims to provide an electrochemical device excellent in high temperature storage characteristics and cycling characteristics at high voltages, and a nonaqueous electrolyte for the electrochemical device. The present invention relates to an electrochemical device including: a positive electrode; a negative electrode; and a nonaqueous electrolyte containing a nonaqueous solvent and an electrolyte salt, wherein the nonaqueous solvent contains a fluorinated linear carbonate represented by the formula (1): | 01-23-2014 |
| 20140050993 | POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, METHOD FOR PREPARING SAME AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME - A positive active material including a compound represented by Li | 02-20-2014 |
| 20140127590 | NONAQUEOUS ELECTROLYTIC SOLUTION FOR SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY - A nonaqueous electrolytic solution effective in improving cycle characteristics and used for a nonaqueous electrolyte secondary battery including a positive electrode having a positive-electrode active material capable of storing and releasing metal ions and a negative electrode having a negative-electrode active material containing at least one atom selected from the group consisting of Si, Sn, and Pb includes an electrolyte, a nonaqueous solvent, and an isocyanate compound having at least one aromatic ring in its molecule. | 05-08-2014 |
| 20140162144 | Method For Producing Lithium Tetrafluoroborate Solution - Disclosed is a production method of a lithium tetrafluoroborate solution for use as a lithium battery electrolytic solution, including: a reaction step of forming lithium tetrafluoroborate by reaction of lithium fluoride and boron trifluoride in a chain carbonate ester solvent and thereby obtaining a reaction solution of the lithium tetrafluoroborate dissolved in the chain carbonate ester solvent; a water removal step of adding a water removing agent to the reaction solution; an acidic impurity removal step of removing an acidic impurity component from the reaction solution by concentrating the reaction solution after the water removal step; and a dilution step of diluting the concentrated solution after the acidic impurity removal step. It is possible by this method to obtain the lithium tetrafluoroborate solution whose acidic impurity content and water content are reduced to be 50 mass ppm or lower and 15 mass ppm or lower, respectively. | 06-12-2014 |
| 20140295290 | ELECTRODES, ELECTROCHEMICAL CELLS, AND METHODS OF FORMING ELECTRODES AND ELECTROCHEMICAL CELLS - Electrodes and methods of forming electrodes are described herein. The electrode can be an electrode of an electrochemical cell or battery. The electrode includes a current collector and a film in electrical communication with the current collector. The film may include a carbon phase that holds the film together. The electrode further includes an electrode attachment substance that adheres the film to the current collector. | 10-02-2014 |
| 20150333334 | LITHIUM ION BATTERY USING COPPER NANOWIRE FABRIC-BASED CURRENT COLLECTOR - A lithium ion battery using a copper nanowire fabric-based current collector comprises an anode, a cathode and a separation unit. The anode has a first current collector and an active material attached to the first current collector. The first current collector includes a copper nanowire fabric. The copper nanowire fabric is in form of a plate, and the active material is attached to the first current collector. The cathode has a second current collector and a lithium compound attached to the second current collector and releasing or absorbing lithium ions. The separation unit is arranged between the anode and the cathode and includes an electrolyte allowing lithium ions to move between the anode and the cathode. The anode has much less weight and further higher energy density than the conventional anode using copper foil as the first current collector. | 11-19-2015 |
