Abstract: A battery that can secure the sufficient capacity, reduces deviation of the pressure distribution inside a spirally wound electrode body, and shows the superior charge and discharge characteristics is provided. The battery includes: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead jointed to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.

Abstract: An electrolyte solution and a battery which are capable of improving cycle characteristics are provided. An anode includes a simple substance, an alloy or a compound of a metal element or a metalloid element capable of forming an alloy with lithium as an anode active material. A separator is impregnated with an electrolyte solution formed through dissolving an electrolyte salt in a solvent. The electrolyte salt includes a first electrolyte salt including LiB(C2O4)2 and a second electrolyte salt including at least one kind selected from the group consisting of LiPF6, LiBF4, LiN(CF3SO2)2, LiN(C2F5SO2)2, LiClO4, LiAsF6 and LiC(CF3SO2)3. In the solvent, 4-fluoroethylene carbonate is included. A coating is formed on the anode by the first electrolyte salt, and high ionic conductivity can be obtained by the second electrolyte salt. Further an oxidation-decomposition reaction of the electrolyte solution which occurs in a cathode can be prevented by 4-fluoroethylene carbonate.

Abstract: A non-aqueous electrolytic solution secondary battery includes a positive electrode containing, as a positive electrode active material, a compound represented by the following general formula, LixFe1-yMyPO4, wherein M is at least one member selected from the group consisting of Co, Ni, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca and Sr; 0.9<x<1.2; and 0?y<0.3; a negative electrode containing a lithium metal, a lithium alloy or a material capable of doping and dedoping lithium; and a non-aqueous electrolytic solution, the non-aqueous electrolytic solution containing a fluorinated ethylene carbonate FEC.

Abstract: A cathode material capable of improving capacity and superior low temperature characteristics, and a battery using the cathode material are provided. A cathode and an anode are layered with an electrolyte layer and a separator in between. The cathode contains a complex oxide containing lithium, manganese, nickel, and cobalt; a complex oxide containing lithium and at least one of nickel and cobalt; and a complex oxide containing lithium and manganese and having a spinel structure or a phosphorus oxide containing lithium and iron at a given ratio.

Abstract: An electrolyte whose battery capacity, cycle characteristics, load characteristics, and low temperature characteristics are all excellent, and a battery using it. A cathode and an anode are layered and wound with a separator and electrolyte layer in between. The electrolyte layer contains an electrolytic solution containing at least one from the group consisting of vinylethylene carbonate and its derivatives in the range of 0.05 wt % to 5 wt % in total and a polymer. Therefore, chemical stability of the electrolyte layer is improved. It is preferable that the electrolytic solution further contains ethylene carbonate and propylene carbonate with a mass ratio of ethylene carbonate to propylene carbonate ranging from about 15/85 to about 75/25.

Abstract: Provided is a battery capable of preventing the entry of water even if a sealing width is reduced. A battery element comprising a cathode and an anode is accommodated in a film-shaped casing. The casing includes a metal layer, a resin layer disposed on a side of the metal layer closer to the battery element with an adhesive layer in between, and a resin layer disposed on a side of the metal layer opposite to the side where the resin layer is formed with an adhesive layer in between. The adhesive layer has a water vapor transmission rate of 800 g/m2·day or less for a thickness of 25 ?m at 40° C. and 90% RH and a thickness of 10 ?m or less. Thereby, even if the sealing width is reduced, the entry of water into the battery can be prevented.

Abstract: The present application provides a nonaqueous electrolyte secondary battery that includes, a cathode capable of being electrochemically doped/dedoped with lithium, an anode capable of being electrochemically doped/dedoped with lithium, and an electrolyte placed between the cathode and the anode, wherein the electrolyte contains at least one of fluoro ethylene carbonate represented by Chemical Formula (1) and difluoro ethylene carbonate represented by Chemical Formula (2) as a solvent and the ratio of a discharge capacity B during discharging at a 5C rate to a discharge capacity A during discharging at a 0.2C rate ((B/A)×100) is 80% or more.

Abstract: A non-aqueous electrolytic solution secondary battery includes a positive electrode containing, as a positive electrode active material, a compound represented by the following general formula, LixFe1-yMyPO4, wherein M is at least one member selected from the group consisting of Co, Ni, Cu, Zn, Al, Sn, B, Ga, Cr, V, Ti, Mg, Ca and Sr; 0.9<x<1.2; and 0?y<0.3; a negative electrode containing a lithium metal, a lithium alloy or a material capable of doping and dedoping lithium; and a non-aqueous electrolytic solution, the non-aqueous electrolytic solution containing a fluorinated ethylene carbonate FEC.

Abstract: A battery that can secure the sufficient capacity, reduces deviation of the pressure distribution inside a spirally wound electrode body, and shows the superior charge and discharge characteristics is provided. The battery includes: a spirally wound electrode body in which a cathode having a cathode active material layer on a strip-shaped cathode current collector and an anode having an anode active material layer on a strip-shaped anode current collector are layered with a separator in between, and spirally wound in a planular state; and a lead jointed to the cathode current collector or the anode current collector in a center portion of the spirally wound electrode body. An inner circumferential end of the cathode active material layer is provided in a region where the inner circumferential end does not overlap with the lead in a short axis direction of the spirally wound electrode body.

Abstract: A battery with improved safety that can more surely short-circuit electrodes when flattened out by the external force is provided. A center pin (30) is inserted in the center of a spirally wound electrode body formed by layering and spirally winding a cathode and an anode with a separator in between. The center pin (30) has a cut line (31) provided in the longitudinal direction and a first cutout (32) vertically crossing the cut line (31). When flattened out by the external force, a corner (33) at an intersection of the cut line (31) and the first cutout (32) is projected, and short-circuit is surely generated. Further, it is preferable that the center pin (30) has a second cutout (34) in the direction perpendicular to the cut line (31) in a position facing the cut line (31) in the circumferential direction.

Abstract: A battery with improved safety which can establish a short circuit between electrodes more reliably when the battery is crushed by an external force is provided. A battery includes a battery element including a cathode and an anode, a battery can containing the battery element, and a conductive short circuit member arranged in a gap between the battery element and the battery can, the short circuit member capable of biting into the battery element when the battery can is deformed.

Abstract: An non-aqueous electrolyte cell having superior electronic conductivity and superior cell characteristics. A cathode active material used for the cell is a composite material of a compound having the formula LixFePO4, where 0<x?1.0, and a carbon material, wherein the specific surface area as found by the Bullnauer Emmet Teller formula is not less than 10.3 m2/g.

Abstract: A cell in which liquid leakage or destruction may be prevented as the apparent energy density per unit volume of the cell is maintained. The cell uses, as a cathode active material, a compound of an olivinic crystal structure having the formula LixFe1?yMyPO4, where M is at least one selected from the group of Mn, Cr, Co, Cu, Ni, V, Mo, Ti, Zn, Al, Ga, Mg, B and Nb, with 0.05?x?1.2 and 0?y?0.8. By adjusting the amount of the electrolyte solution, the amount of the void in the container is set so as to be not less than 0.14 cc and not more than 0.3 cc per 1 Ah of the cell capacity.

Abstract: A cathode material capable of improving capacity and superior low temperature characteristics, and a battery using the cathode material are provided. A cathode and an anode are layered with an electrolyte layer and a separator in between. The cathode contains a complex oxide containing lithium, manganese, nickel, and cobalt; a complex oxide containing lithium and at least one of nickel and cobalt; and a complex oxide containing lithium and manganese and having a spinel structure or a phosphorus oxide containing lithium and iron at a given ratio.

Abstract: A LiFePO4 carbon composite material is to be synthesized in a single phase satisfactorily to prevent the deterioration of the performance of the cathode active material from occurring and achieve superior cell characteristics. In preparing a cathode active material, starting materials for synthesis of a compound represented by the general formula LixFePO4, where 0<x?1, are mixed, milled and a carbon material is added to the resulting mass at an optional time point in the course of mixing, milling and sintering. Li3PO4, Fe3(PO4)2 or its hydrates Fe3(PO4)2.nH2O, where n denotes the number of hydrates, are used as the starting materials for synthesis of LixFePO4. The temperature of a product from said sintering is set to 305° C. or less when said product from said sintering is exposed to atmosphere.

Abstract: A battery capable of improving battery characteristics such as cycle characteristics and high temperature storage characteristics is provided. An anode includes an anode active material which includes Sn or Si as an element. A separator is impregnated with an electrolyte solution, and the electrolyte solution includes an acid anhydride such as succinic anhydride or a derivative thereof. Thereby, a coating is formed on the anode, and the decomposition of the electrolyte solution in the anode can be prevented. An electrolyte solution to which 4-fluoro-1,3-dioxolane-2-one is mixed is more preferably used.

Abstract: A secondary battery capable of improving charge-discharge cycle characteristics in the case where an alloy material is used as an anode active material is provided. An exposed cathode region is disposed in an outer end portion of a cathode. The exposed cathode region includes an insulating protective member on at least one of an outer side and an inner side of the exposed cathode region in a position opposed to an outer end portion of an anode active material layer in one turn inside the outer end portion. In a cathode active material layer, a central angle between an outer end portion and a central end portion at the center of the spirally wound body is preferably within a range from 0° to ?90° inclusive from the central end portion in a winding direction.

Abstract: A battery capable of improving the energy density and cycle characteristics is provided. A cathode active material layer contains a complex oxide containing Li and Co as a cathode active material. An anode active material layer contains a CoSnC containing material containing Sn, Co, and C as an element, in which the content of C is from 16.8 wt % to 24.8 wt %, and the ratio of Co to the total of Sn and Co is from 30 wt % to 45 wt % as an anode active material. The surface density ratio of the cathode active material layer to the anode active material layer (surface density of the cathode active material layer/surface density of the anode active material layer) is from 2.77 to 3.90.

Abstract: A non-aqueous electrolyte cell having high discharge capacity, an improved capacity upkeep ratio and optimum cyclic characteristics. The non-aqueous electrolyte cell has a cell device including a strip-shaped cathode material and a strip-shaped anode material, layered and together via a separator and coiled a plural number of times, a non-aqueous electrolyte solution, and a cell can for accommodating cell device and the non-aqueous electrolyte solution. The cathode employs a cathode active material containing a compound of the olivinic structure represented by the general formula LixFe1-yMyPO4, where M is at least one selected from the group consisting of Mn, Cr, Co, Cu, Ni, V, Mo, Ti, Zn, Al, Ga, Mg, B and Nb, with 0.05?x?1.2 and 0?y?0.8, with the compound being used either singly or in combination with other materials. The ratio of an inner diameter d to an outer diameter D of cell device is selected so that 0.05<d/D<0.5.

Abstract: An electrolyte solution and a battery which are capable of improving cycle characteristics are provided. An anode includes a simple substance, an alloy or a compound of a metal element or a metalloid element capable of forming an alloy with lithium as an anode active material. A separator is impregnated with an electrolyte solution formed through dissolving an electrolyte salt in a solvent. The electrolyte salt includes a first electrolyte salt including LiB(C2O4)2 and a second electrolyte salt including at least one kind selected from the group consisting of LiPF6, LiBF4, LiN(CF3SO2)2, LiN(C2F5SO2)2, LiClO4, LiAsF6 and LiC(CF3SO2)3. In the solvent, 4-fluoroethylene carbonate is included. A coating is formed on the anode by the first electrolyte salt, and high ionic conductivity can be obtained by the second electrolyte salt. Further an oxidation-decomposition reaction of the electrolyte solution which occurs in a cathode can be prevented by 4-fluoroethylene carbonate.