Patent application number | Description | Published |
20080220329 | NEGATIVE ELECTRODE ACTIVE MATERIAL FOR AN ELECTRICITY STORAGE DEVICE AND METHOD FOR MANUFACTURING THE SAME - To provide a negative electrode active material for an electricity storage device, which has considerably enhanced low-temperature characteristic, increased energy density, and increased output power. A negative electrode active material is made of a carbon composite containing carbon particles as a core and a fibrous carbon having a graphene structure, which is formed on the surfaces and/or the inside of the carbon particles, wherein the carbon composite has a volume of all mesopores within 0.005 to 1.0 cm | 09-11-2008 |
20080299455 | ELECTRIC STORAGE DEVICE AND FABRICATING METHOD THEREFOR - An electrode laminate unit | 12-04-2008 |
20080299459 | FABRICATION METHOD OF ELECTRODE MATERIAL, ELECTRODE MATERIAL, AND NON-AQUEOUS LITHIUM ION SECONDARY BATTERY - The ions other than a lithium ion and having a greater ion radius is interposed, before the lithium ion is doped, as an interlayer securing member in a vanadium oxide having a layered crystal into which the lithium ion can be doped. Since the interlayer securing member is interposed, the dope or dedope of the lithium ion into or from the vanadium oxide afterward can smoothly be performed. A sodium ion or the like can be employed as the interlayer securing member. | 12-04-2008 |
20090023066 | NEGATIVE ELECTRODE ACTIVE MATERIAL FOR CHARGING DEVICE - To present a carbon material which provides an electrical storage device not only ensuring a high energy density but also realizing a high output and an excellent low temperature performance. | 01-22-2009 |
20090027831 | Lithium Ion Capacitor - It is to provide a lithium ion capacitor having a high energy density, a high output density, a large capacity and high safety. | 01-29-2009 |
20090029257 | ELECTRIC STORAGE DEVICE - A negative electrode | 01-29-2009 |
20090075161 | ELECTRIC STORAGE DEVICE - A positive electrode | 03-19-2009 |
20090075172 | ELECTRIC STORAGE DEVICE - A negative electrode | 03-19-2009 |
20090097189 | LITHIUM ION CAPACITOR - A lithium ion capacitor having high energy density, high output density, high capacity and high safety is provided. | 04-16-2009 |
20090104534 | ELECTRODE MATERIAL, METHOD OF MANUFACTURING THEREOF AND NONAQUEOUS LITHIUM SECONDARY BATTERY - A crystal structure is provided to improve a characteristic of an electrode material, such as vanadium oxide. In the crystal structure, an amorphous state and a layered crystal state coexist at a predetermined ratio in a layered crystalline material such as vanadium oxide. In the layered crystalline material having such a layered crystal structure, layered crystal particles having a layer length L | 04-23-2009 |
20090123823 | ELECTRIC STORAGE DEVICE - An electric storage device | 05-14-2009 |
20090135549 | LITHIUM ION CAPACITOR - A lithium ion capacitor includes a positive electrode including a positive electrode active material capable of reversibly doping either one or both of a lithium ion and an anion, a negative electrode including a negative electrode active material capable of reversibly doping a lithium ion, and a non-protonic organic solvent electrolytic solution of a lithium salt as an electrolytic solution. The lithium ion is doped to either one or both of the negative electrode and positive electrode so that the positive electrode potential after the positive electrode and negative electrode are short-circuited is 2.0 V or less. A surface of the negative electrode is covered with a polymer. | 05-28-2009 |
20090154064 | Lithium ion capacitor - A lithium ion capacitor including a positive electrode, a negative electrode, and an aprotic organic solvent solution of a lithium salt as an electrolytic solution. The positive electrode active material is capable of reversibly supporting lithium ions and/or anions, the negative electrode active material is capable of reversibly supporting lithium ions and anions, and the potentials of the positive electrode and the negative electrode are at most 2.0 V after the positive electrode and the negative electrode are short-circuited. The positive electrode and the negative electrode are alternately laminated with a separator interposed therebetween to constitute an electrode unit, the cell is constituted by at least two such electrode units, lithium metal is disposed between the electrode units, and lithium ions are preliminarily supported by the negative electrode and/or the positive electrode by electrochemical contact of the lithium metal with the negative electrode and/or the positive electrode. | 06-18-2009 |
20090161296 | LITHIUM ION CAPACITOR - A lithium ion capacitor includes a positive electrode, a negative electrode, and a non-protonic organic solvent electrolytic solution of a lithium salt. A positive electrode active material is a material capable of reversibly doping a lithium ion and/or an anion. A negative electrode active material is a material capable of reversibly doping a lithium ion. The lithium ion is doped in advance to either one or both of the negative electrode and the positive electrode so that a positive electrode potential after the positive electrode and the negative electrode are short-circuited is 2.0 V (relative to Li/Li | 06-25-2009 |
20090174986 | Lithium ion capacitor - It is to provide a lithium ion capacitor having a high capacity retention at the time of continuous charge at a high temperature and excellent in durability. | 07-09-2009 |
20090197171 | ELECTRIC STORAGE DEVICE - An electric storage device | 08-06-2009 |
20090197175 | ELECTRIC STORAGE DEVICE - An electric storage device | 08-06-2009 |
20090214955 | ELECTRIC STORAGE DEVICE, ELECTRODE, METHOD FOR FABRICATING ELECTRODE, AND MANAGEMENT METHOD - A mixture layer for an electrode is formed on a punched current collector. For example, the mixture layer is made of an active material, conductive assistant, binder, and the like. The mixture layer having the structure described above is formed into a slurry, for example, and applied onto the current collector. The applied mixture layer is dried to fabricate an electrode. The thus formed electrode is used to assemble an electric storage device. Upon the assembly, lithium ions are pre-doped into a negative electrode. The pre-doping time is determined according to air permeability of the electrodes. | 08-27-2009 |
20090242507 | MANUFACTURING PROCESS OF ELECTRODE - A resist layer is formed over one surface of a current-collector material, while a resist layer having a predetermined pattern is formed on the other surface of the current-collector material. Through-holes are formed on the current-collector material through an etching process. An electrode slurry is applied onto the current-collector material formed with the through-holes without removing the resist layers. Specifically, since the through-holes are closed by the resist layer, the electrode slurry does not pass through the through-holes to leak out. Therefore, the current-collector material can be conveyed in the horizontal direction, whereby the productivity of an electrode can be enhanced. The resist layers are made of PVdF, and the resist layers are removed in a heating and drying step in which the PVdF is dissolved. | 10-01-2009 |
20090246624 | CARBON MATERIAL FOR NEGATIVE ELECTRODE, ELECTRIC STORAGE DEVICE, AND PRODUCT HAVING MOUNTED THEREON ELECTRIC STORAGE DEVICE - Mesoporous graphite is used as an active material of a negative electrode constituting a lithium ion secondary battery or a lithium ion capacitor. Specifically, the mesoporous graphite has a specific area within the range of 0.01 m | 10-01-2009 |
20090246626 | LITHIUM METAL FOIL FOR BATTERY OR CAPACITOR - A lithium ion capacitor includes, as a lithium ion supply source, a lithium metal foil for batteries or capacitors. A current collector | 10-01-2009 |
20090246629 | MANUFACTURING METHOD OF ELECTRODE, ELECTRIC STORAGE DEVICE, AND INTERMEDIATE LAMINATE MEMBER - In a current collector laminating step, a current-collector laminate unit | 10-01-2009 |
20090246633 | MANUFACTURING METHOD OF ELECTRODE MATERIAL, AND ELECTRIC STORAGE DEVICE - When a layered crystal material of vanadium pentoxide that can be used as a positive electrode active material is manufactured, a sulfur-containing organic material is not used as a raw material in the present invention. Therefore, uncertain adhesion of the sulfur-containing organic material to the layered crystal material is eliminated. The property of the suspension containing a vanadium compound and plural lithium compounds such as lithium sulfide and lithium hydroxide is adjusted by using these lithium compounds. By this adjustment, the pentavalence of the vanadium ions is controlled to be a desired ratio. Consequently, an active material having reproducibility can be manufactured. First discharge energy of a lithium ion secondary battery using the active material can be enhanced. | 10-01-2009 |
20090246634 | LAYERED CRYSTAL MATERIAL, MANUFACTURING METHOD OF ELECTRODE MATERIAL, AND ELECTRIC STORAGE DEVICE - A physical property of a suspension into which plural lithium materials, such as a lithium sulfide, lithium hydroxide, etc., and a vanadium material are dissolved is adjusted by using the plural lithium materials. According to the adjustment, the valence of pentavalent vanadium ions is controlled to be a desired ratio. A material having the obtained layered crystal particles and an amorphous part is used as a starting material, and this material is subject to a heat treatment. With this process, the layered crystal particles grow, while the amorphous part is decreased. Consequently, it is confirmed that the rate of capacity deterioration is improved. | 10-01-2009 |
20090269274 | PRODUCTION METHOD OF LAYERED CRYSTAL MATERIAL - An ammonium metavanadate is heat-treated to 500° C. or less at a predetermined rate of temperature rise, whereby a microcrystal particle of a vanadium pentoxide can be formed. According to the production method described above, a crystal of a nano-vanadium having a layer length of 100 nm or less can be formed. The nano-vanadium formed by the production method described above can effectively be used for an electrode of an electric storage device such as a battery. The production method according to the present invention can be linked to a conventional production method in which an ammonium metavanadate can be formed in the course of the method, whereby the present invention can smoothly be embodied. | 10-29-2009 |
20100027195 | LITHIUM ION CAPACITOR - A lithium ion capacitor includes a positive electrode made of a material capable of reversibly doping and dedoping lithium ions and/or anions; a negative electrode made of a material capable of reversibly doping and dedoping lithium ions; and an electrolytic solution made of an aprotonic organic solvent electrolyte solution of a lithium salt. When the negative electrode and/or positive electrode and a lithium ion supply source are electrochemically brought into contact, lithium ions are doped in a negative electrode and/or positive electrode. A positive electrode potential after the positive electrode and negative electrode are short-circuited is 2.0 V (vs. Li/Li | 02-04-2010 |
20100035150 | ELECTRIC STORAGE DEVICE - An electrode laminate unit of an electric storage device includes positive electrodes, negative electrodes and a lithium electrode connected to the negative electrode. When an electrolyte solution is injected into the electric storage device, lithium ions are emitted from the lithium electrode to the negative electrode. A positive and a negative electrode current collector have through-holes that guide the lithium ions in the laminating direction. The aperture ratio of the through-holes at the edge parts where the electrolyte solution is easy to be permeated is set to be smaller than the aperture ratio at central parts in order to suppress the permeation. Thus, the distribution of the electrolyte solution is made uniform, whereby the doping amount is made uniform. | 02-11-2010 |
20100128415 | LITHIUM ION CAPACITOR - A lithium ion capacitor includes a positive electrode made of a material capable of reversibly carrying either one or both of a lithium ion and an anion, a negative electrode made of a material capable of reversibly carrying a lithium ion, and an electrolytic solution made of a non-protonic organic solvent electrolytic solution of a lithium salt. A negative electrode active material is non-graphitizable carbon having a ratio of number of hydrogen atoms to number of carbon atoms of zero or more and less than 0.05. The lithium ion is doped in advance to either one or both of the negative electrode and the positive electrode so that a negative electrode potential when a cell is discharged to a voltage one half a charging voltage of the cell is 0.15 V or less relative to a lithium ion potential. | 05-27-2010 |
20100173184 | LITHIUM ION SECONDARY BATTERY - It has been found that when the potentials of the positive electrode and the negative electrode of the lithium ion secondary battery after the electrodes are short-circuited are each within a predetermined range, the battery produces high energy density. That is the present invention provides a lithium ion secondary battery having a positive electrode, a negative electrode and an electrolyte containing a lithium salt and an aprotic organic in which a positive electrode active material is a material allowing lithium ions and/or anions to be reversibly doped thereinto, and a negative electrode active material is a material allowing lithium ions to be reversibly doped thereinto, and the potentials of the positive electrode and the negative electrode after the positive electrode and the negative electrode are short-circuited are each selected to be within a range from 0.5 V to 2.0 V. | 07-08-2010 |
20100330431 | ELECTRIC STORAGE DEVICE AND FABRICATING METHOD THEREFOR - An electrode laminate unit | 12-30-2010 |
20110014358 | CARBON MATERIAL FOR NEGATIVE ELECTRODE, ELECTRIC STORAGE DEVICE, AND PRODUCT HAVING MOUNTED THEREON ELECTRIC STORAGE DEVICE - Mesoporous graphite is used as an active material of a negative electrode constituting a lithium ion secondary battery or a lithium ion capacitor. Specifically, the mesoporous graphite has a specific area within the range of 0.01 m | 01-20-2011 |
20110041324 | ELECTRICAL STORAGE DEVICE AND MANUFACTURING METHOD OF THE SAME - An electrical storage device having a positive electrode, a negative electrode, a lithium electrode, and an electrolyte capable of transferring lithium ion, the lithium electrode is out of direct contact with the negative electrode, and lithium ion is supplied to the negative electrode by flowing a current between the lithium and negative electrode through an external circuit. A method of using the electrical storage device includes using the lithium electrode as a reference electrode, the positive electrode potential and negative electrode potential is measured, and the potential of the positive or negative electrode is controlled during charging or discharging. The potentials of the positive electrode and negative electrode are monitored to easily determine whether deterioration of the electrical storage device is caused by the positive or negative electrode. It is possible to control the device with the potential difference between the negative electrode and reference electrode, using the negative potential. | 02-24-2011 |