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: An object of the present invention is to provide a negative electrode for a secondary battery which has large capacity and restrains a rise in resistance inside the battery and reduction in capacity even after cycles and the secondary battery using the same. A first active material layer 2a comprising members occluding and releasing Li onto a collector 1a is formed and a second active material layer 3a as an alloy layer containing metal forming alloy with lithium or lithium and metal not-forming alloy with lithium is formed thereon. The secondary battery is constituted using the negative electrode.

Abstract: This invention relates to an anode for a secondary battery capable of occluding and releasing lithium ions, the anode having a multi-layer structure comprising: a first layer containing carbon as a main component; and a second layer as a main component containing a lithium-occluding material film, the film capable of occluding lithium more than a theoretical lithium-occlusion capacity for carbon, as well as a secondary battery using the anode. This invention can provide a secondary battery with a substantially improved battery capacity in a range where the battery is actually used, while having a higher charge-discharge efficiency and good cycle properties.

Abstract: An anode with a multi-layer structure including a first layer (21) having carbon as a main component, and a second layer (22) having lithium-ion conductivity and including a material as a main component thereof which can insert and extract lithium ions, or a multi-layer structure including a third layer (23) containing lithium in addition to the first layer and the second layer, and a lithium secondary battery including the same. The lithium secondary battery can be provided in which the battery capacity is substantially enhanced in the voltage range where the battery is actually used while maintaining the higher charge-discharge efficiency and the excellent cycle performance.

Abstract: A lithium ion secondary battery provided with both high weight energy density and good cycle characteristics (capacity retaining ratio during an extended use). A secondary battery comprising a negative electrode having, as a negative electrode active material, carbon and a lithium absorbing material that forms an alloy with lithium, the above active material having a layer structure, a positive electrode capable of absorbing and desorbing lithium ions, and an electrolyte disposed between the positive and negative electrodes, wherein the Li content in the lithium absorbing material layer in the negative electrode is between 31 and 67% at a discharge depth of 100%.

Abstract: A vacuum deposition apparatus is used for deposit evaporated substance from evaporation sources (6a and 6b) on the desired position of a flexible substrate (1). While the flexible substrate (1) is carried using rollers in a vacuum, shutters (8a and 8b) are opened and closed to control the movement of the evaporated substance via openings. A film having a desired shape of pattern is formed on the flexible substrate (1) with higher controllability.

Abstract: A multilayer negative electrode having a carbon layer as a first layer, realizing high battery capacity in the range of voltages at which a battery is actually used while maintaining high charge/discharge efficiency and good cycle characteristics by a simple method. A first layer (2a) the major component of which is carbon and a second layer (3a) the major component of which is filmy material having lithium ion conductivity are stacked on copper foil (1a). The second layer (3a) is formed by dispersing at least one kind of metal particles, alloy particles, and metal oxide particles in a solution in which a binder is dissolved and applying and drying the coating solution.

Abstract: A lithium secondary battery in the present invention includes as a negative electrode a lithium alloy, lithium metal formed on a conductive substrate by vacuum film-forming, or the lithium metal having a hydrophobic material layer formed on a surface of an amorphous metallic lithium. Such a lithium secondary battery gives satisfaction with no dendrite formation and long cycle life.

Abstract: An anode for a secondary battery capable of inserting and extracting a lithium ion having a multi-layered structure including a first anode layer (2a) containing carbon as a main component; a second anode layer (3a) made of a film-like material through which a lithium component passes; and a third anode layer (4a) containing lithium and/or a lithium-containing compound as a main component. The battery capacity of the lithium ion battery is substantially increased while the higher charge-discharge efficiency and the stable cycle performance are maintained.

Abstract: A negative electrode for a rechargeable battery including: a current collector, a first layer containing a conductive material to occlude and release lithium ion, the first layer formed on the current collector, a second layer containing a metal selected from lithium and lithium alloy, the second layer formed on the first layer, and a third layer containing a lithium ion conductive material, the third layer formed on the second layer. The third layer prevents the lithium and/or the lithium alloy in the second layer from being in contact with the electrolyte and smoothly feeds the lithium to the second layer to improve the efficiency of the negative electrode. The first layer can occlude and release the part of the lithium to be occluded and released, thereby reducing the volume change of the second layer. Such a structure of the negative electrode enables us to enhance cycling efficiency, and to attain long cycle life and good safety.

Abstract: This invention provides a lithium ion secondary battery comprising a cathode, an anode and an nonaqueous electrolytic solution in which an electrolyte is dissolved in a nonaqueous solvent, wherein the anode comprises a non-graphitizable carbon as an anode activator; and the nonaqueous electrolytic solution comprises at least one anode protecting component selected from the group consisting of sultones having a 5- to 7-membered cyclic sulfonate structure and their substituted derivatives as well as vinylene carbonates and their substituted derivatives.

Abstract: A lithium secondary battery in the present invention includes as a negative electrode a lithium alloy, lithium metal formed on a conductive substrate by vacuum film-forming, or the lithium metal having a hydrophobic material layer formed on a surface of an amorphous metallic lithium. Such a lithium secondary battery gives satisfaction with no dendrite formation and long cycle life.

Abstract: An anode for use in a non-aqueous-electrolyte secondary battery includes an active material film for occluding and releasing lithium ions, and an amorphous carbon film or a diamond-like carbon film covering the active material film for suppressing growth of dendrite and degradation of the anode, thereby achieving improved cycle lifetime of the secondary battery.

Abstract: This invention relates to an anode for a secondary battery capable of occluding and releasing lithium ions, the anode having a multi-layer structure comprising: a first layer containing carbon as a main component; and a second layer as a main component containing a lithium-occluding material film, the film capable of occluding lithium more than a theoretical lithium-occlusion capacity for carbon, as well as a secondary battery using the anode. This invention can provide a secondary battery with a substantially improved battery capacity in a range where the battery is actually used, while having a higher charge-discharge efficiency and good cycle properties.

Abstract: A negative electrode for a rechargeable battery including: a current collector, a first layer containing a conductive material to occlude and release lithium ion, the first layer formed on the current collector, a second layer containing a metal selected from lithium and lithium alloy, the second layer formed on the first layer, and a third layer containing a lithium ion. conductive material, the third layer formed on the second layer. The third layer prevents the lithium and/or the lithium alloy in the second layer from being in contact with the electrolyte and smoothly feeds the lithium to the second layer to improve the efficiency of the negative electrode. The first layer can occlude and release the part of the lithium to be occluded and released, thereby reducing the volume change of the second layer. Such a structure of the negative electrode enables us to enhance cycling efficiency, and to attain long cycle life and good safety.

Abstract: A lithium secondary battery includes: a positive electrode; and a negative electrode, which further includes a lamination structure comprising: a lithium ion supporting layer capable of supporting lithium ions; and an amorphous-state lithium-based layer in contact directly with the lithium ion supporting layer.