Abstract: The purpose of the present invention is to provide: a composite active material for lithium secondary batteries, which is capable of providing a lithium secondary battery that has large charge and discharge capacity, high-rate charge and discharge characteristics and good cycle characteristics at the same time; and a method for producing the composite active material for lithium secondary batteries.

Abstract: The compact fuel cell which can efficiently perform heating and can be repeatedly used includes a solid electrolyte, an anode that is formed on one surface of the solid electrolyte, a cathode that is formed on another surface of the solid electrolyte, an anode fuel material, a heating portion for heating and maintaining the solid electrolyte and the anode fuel material at a temperature equal to or higher than a predetermined level, and a sealing portion that is installed in the solid electrolyte, forms a sealed space sealing the anode and the anode fuel material together with the solid electrolyte and the heating portion, and can repeatedly open and close, in which a helium leak rate of the sealed space is maintained at 1×10?2 Pa·m3/sec or a lower rate.

Abstract: Provided is a hybrid storage cell that can prevent overcharge, despite lacking an expensive protection switch or other device adapted to deal with high current or high voltage, in order to proactively prevent rupture or ignition of lithium ion storage cells or other organic solution storage cells in the event of unforeseen overcharging. The cell comprises a plurality of series-connected virtual cells (32) of parallel-connected organic solution storage cells (24A) and aqueous solution storage cells (26A), the organic solution storage cells and the aqueous solution storage cells having closely approximating average discharge voltages. The overcharge threshold voltage of the organic solution storage cells is designed to be higher than the final discharge voltage of the aqueous solution storage cells, and the final discharge voltage of the organic solution storage cells to be lower than the final discharge voltage of the aqueous solution storage cells.

Abstract: A plate-like battery pack has: a plurality of single cell elements; a flat battery pack case composed of an insulating material and adapted to have a plurality of holes respectively housing the single cell elements; and a plurality of sealing plates adapted to hermetically seal the holes housing the single cell elements and connect adjacent ones of the single cell elements, and the sealing plates connect the single cell elements in series, parallel or series-parallel.

Abstract: A plate-like battery pack has: a plurality of single cell elements; a flat battery pack case composed of an insulating material and adapted to have a plurality of holes respectively housing the single cell elements; and a plurality of sealing plates adapted to hermetically seal the holes housing the single cell elements and connect adjacent ones of the single cell elements, and the sealing plates connect the single cell elements in series, parallel or series-parallel.

Abstract: Provided is a hybrid storage cell that can prevent overcharge, despite lacking an expensive protection switch or other device adapted to deal with high current or high voltage, in order to proactively prevent rupture or ignition of lithium ion storage cells or other organic solution storage cells in the event of unforeseen overcharging. The cell comprises a plurality of series-connected virtual cells (32) of parallel-connected organic solution storage cells (24A) and aqueous solution storage cells (26A), the organic solution storage cells and the aqueous solution storage cells having closely approximating average discharge voltages. The overcharge threshold voltage of the organic solution storage cells is designed to be higher than the final discharge voltage of the aqueous solution storage cells, and the final discharge voltage of the organic solution storage cells to be lower than the final discharge voltage of the aqueous solution storage cells.

Abstract: The compact fuel cell which can efficiently perform heating and can be repeatedly used includes a solid electrolyte, an anode that is formed on one surface of the solid electrolyte, a cathode that is formed on another surface of the solid electrolyte, an anode fuel material, a heating portion for heating and maintaining the solid electrolyte and the anode fuel material at a temperature equal to or higher than a predetermined level, and a sealing portion that is installed in the solid electrolyte, forms a sealed space sealing the anode and the anode fuel material together with the solid electrolyte and the heating portion, and can repeatedly open and close, in which a helium leak rate of the sealed space is maintained at 1×10?2 Pa·m3/sec or a lower rate.