Abstract: Provided is a highly practical pressure vessel in which there is minimal inside diameter deformation even if openings in a center inlet/outlet part are large, and there is little pressure-induced elongation from a center to both ends.

Abstract: The present invention provides a composite positive electrode material for a lithium ion battery, which is particularly excellent in high-rate discharge characteristics in a battery, and also provides a slurry, positive electrode and battery using the composite positive electrode material. The composite positive electrode material for a lithium ion battery contains: a positive electrode active material (a); a conductive material (b) having a primary particle diameter of 10 to 100 nm and/or a fibrous conductive material (c) having a fiber diameter of 1 nm to 1 ?m; and a conductive material (d) having an aspect ratio of 2 to 50.

Abstract: Disclosed is a composite positive electrode material for lithium ion batteries, which especially enables to achieve excellent high-rate discharge characteristics in a battery. Also disclosed are a slurry, positive electrode and battery using such a composite positive electrode material. Specifically disclosed is a composite positive electrode material for lithium ion batteries, which contains a positive electrode active material (a), a conductive substance (b) having a primary particle diameter of 10-100 nm and/or a fibrous conductive substance (c) having a fiber diameter of from 1 nm to 1 ?m, and a conductive substance (d) having an aspect ratio of 2-50.

Abstract: A secondary battery electrode, which is formed by stacking an electrode active material layer (I) containing spinel-structured lithium manganate as an electrode active material and an electrode active material layer (II) containing, as an electrode active material, a composite oxide represented by the following Chemical formula (1) in a thickness direction of the electrode, in which the electrode active material layer (I) is disposed in contact with a current collector, and an average particle diameter of the composite oxide is smaller than an average particle diameter of the spinel-structured lithium manganate. In such a way, it is possible to provide a secondary battery electrode capable of realizing a secondary battery excellent in both of a volumetric energy density and a volumetric output density.

Abstract: A hydrogen storage material including: molecular layers L1 to Li+2 which are stacked on one another in parallel and mainly composed of six-membered rings having carbon atoms; and protrusions Pr1a to Pri protruding from atomic planes of adjacent molecular layers L1 to Li+2 by lengths of not more than interlayer distances d1 to di+2 of the adjacent molecular layers.

Abstract: A positive electrode for a non-aqueous electrolytic secondary battery, includes: 1) a current collector; and 2) an active material layer formed on a surface of the current collector, the active material layer including: i) a positive electrode active material having an average particle diameter of less than or equal to 5 ?, ii) a conductivity assistant including: a) a particulate conductive material having: a primary particle diameter of less than or equal to 70 nm, and an aggregate size of less than 1 ?m, and b) a long chain conductive material, and iii) a binder.

Abstract: A rechargeable lithium ion battery with high power density comprises a positive electrode; a negative electrode; and a non-aqueous electrolytic solution, in which the positive electrode includes a active material layer containing a positive electrode active material with the particle diameter of 5 ?m or less and having the thickness at a range of 20 to 80 ?m. Another rechargeable lithium ion battery with high power density comprises a positive electrode; a negative electrode; and a non-aqueous electrolytic solution, in which the positive electrode has two active material layers, each of which contains a positive electrode active material with a different diameter and has the thickness at a range of 20 to 30 ?m.

Abstract: A secondary battery electrode of the present invention has an electrode active material composed of particles with an average particle size of not more than 3 ?m, and a conductive material contained in an amount of not less than 3 and less than 50 parts by weight with respect to 100 parts by weight of the electrode active material. The secondary battery electrode is capable of extracting a maximum effect of using fine particles as a constituent material.

Abstract: The disclosure relates to positive electrodes for storage cells including a ground positive electrode active material and a conductivity enhancement additive, wherein the ground positive electrode active material exhibits a specific surface area of 5 m2/g or greater, a crystallite diameter of 70 nanometers or less, and a 50% cumulative particle diameter of 1 micrometer or less. The disclosure further relates to storage batteries including positive electrodes having ground positive electrode active material, and battery modules including multiple electrically connected batteries, each battery including one or more storage cells having a positive electrode including ground positive electrode active material. The disclosure also relates to methods of fabricating storage cells and batteries with positive electrodes having ground positive electrode active material.

Abstract: Disclosed is a hydrogen storage material and a production method thereof. The hydrogen storage material has a carbon material having: an interlayer space for hydrogen occlusion, produced by removal at least a portion of an organic compound from a graphite intercalation compound comprising graphite and the organic compound intercalated in the graphite; and an active point at which hydrogen is adsorbed, being produced on the remaining organic compound and/or a part of the hexagonal carbon layers defining the interlayer space. It has a layered lattice structure with hexagonal carbon layers and an expanded interlayer space, and its density determined in accordance with He equilibrium pressure density measuring method changes according as pre-equilibrium He pressures and falls in a range of 0.2 to 1.2 g/cm3 at pre-equilibrium pressures of 0.2 MPa and 0.8 MPa.

Abstract: A hydrogen storage material of the present invention includes graphite formed of graphene, and has a characteristic feature such that the orientation of crystal planes of the graphene is disordered. Hence, hydrogen can be stored into a large number of gaps between the layers of graphene, and it is possible to realize a fuel cell vehicle capable of storing a sufficient amount of hydrogen to attain a long-distance drive.

Abstract: A hydrogen storage material of the present invention comprises a molecule including space formed with a planar sheet constituted by six-membered rings of carbon atoms. Further, in the hydrogen storage material, at least one opening is formed in the sheet. Thereby, it is possible to utilize an internal space of the hydrogen storage material, and hydrogen can be efficiently stored therein.

Abstract: A hydrogen storage material of the present invention comprises a plurality of planar molecular layers stacked, and a particle being inserted into the planar molecular layers to define an interlayer distance between the planar molecular layers. Because the hydrogen storage material of the present invention has a sufficient hydrogen storage capacity, it is possible to realize a fuel cell vehicle capable of storing a sufficient amount of hydrogen to attain a long-distance drive.

Abstract: A fuel vapor treatment or recovery system for an automotive internal combustion engine. The system comprises a canister containing a fuel vapor adsorbing material. A membrane separation module is provided to be connected to the canister and including a separation membrane for separating a mixture gas into an air-rich component and a fuel vapor-rich component. The separation membrane has an air-selective permeability so that the air-rich component is be able to pass through the separation membrane, the mixture gas containing air and fuel vapor. Additionally, a gas transporting device is provided to be connected to the canister, for causing purge gas to be introduced into the canister to purge fuel vapor from the fuel vapor adsorbing material and causing fuel vapor purged from the canister to be fed to the membrane separation module.

Abstract: A multilayer battery cell comprises an ion-conductive separator film. A positive electrode layer is disposed on one surface of the separator film. A negative electrode layer is disposed on the other surface of the separator film. A first conductive layer is disposed on the positive electrode layer and electrically connected to the same. A second conductive layer is disposed on the negative electrode layer and electrically connected to the same. The positive and negative electrode layers and the first and second conductive layers are each produced by employing a spraying process.

Abstract: A rechargeable lithium ion battery with high power density comprises a positive electrode; a negative electrode; and a non-aqueous electrolytic solution, in which the positive electrode includes a active material layer containing a positive electrode active material with the particle diameter of 5 &mgr;m or less and having the thickness at a range of 20 to 80 &mgr;m. Another rechargeable lithium ion battery with high power density comprises a positive electrode; a negative electrode; and a non-aqueous electrolytic solution, in which the positive electrode has two active material layers, each of which contains a positive electrode active material with a different diameter and has the thickness at a range of 20 to 30 &mgr;m.

Abstract: A lithium ion secondary battery comprises a non-aqueous electrolytic solution, and a current collector which is coated with an active material and immersed in the electrolytic solution. By setting the coating thickness of said active material 5-80 &mgr;m, the power density of the lithium ion secondary battery is improved.

Abstract: There is provided a positive electrode comprising positive electrode active material granules which each are composed of lithium manganate; and a first surface layer which is formed on each of the positive electrode active material granules and is to transmit lithium (Li) ion but not manganese (Mn) ion therethrough.

Abstract: A vehicle (V) includes a battery enclosure (152) enclosing a battery system (B). Each battery (Bn) includes a cell (1) that comprises a rolled lamination (LM) of a positive sheet electrode (11) having layers (13) of positive-pole-oriented active substance coated on both side of a charge collecting sheet (12), a negative sheet electrode (21) having layers (23) of negative-pole-oriented active substance coated on both sides of another charge collecting sheet (22), and electrolyte-containing separator (31) between the layers of active substances. The batter further includes a cell enclosure (2) totally enclosing the cell. A gas effluent system (100) for the battery system comprises a gas release system (RSn) for generated gas in the cell of each battery to be released outside the cell enclosure, and a gas discharge system (DS) for released gas to be discharged outside the battery enclosure. The gas release system comprises gas release circuitry including a network (NT) of blanks (Cp: P=1,2, . . . , q, . .

Abstract: A cell which has become inactive is detected in a multi-cell battery (15) comprising plural cells (Cn). An inactivity detecting circuit comprising a signal generator (Dn1) and a diode (Dn2) connected in series, is connected in parallel with the cell (Cn) When the cell becomes inactive, the signal generator (Dn1) emits a signal to indicate the state of the cell. Hence, it is possible to economically detect loss of cell activity.