Abstract: The invention provides a non-aqueous electrolyte battery characterized in that: an active material of the positive electrode includes lithium manganese oxide; the shut-down temperature of the separator is 162° C. or lower; and the area contraction ratio of the separator at 120° C. is 15% or less.

Abstract: A lithium secondary battery including a positive electrode, a negative electrode and a nonaqueous electrolyte containing a solute dissolved in a nonaqueous solvent, wherein a lithium-aluminum-manganese alloy in which lithium is occluded in an aluminum-manganese alloy is a material of the negative electrode, and the nonaqueous electrolyte contains a mixed solvent of a cyclic carbonate and a polyethylene glycol dialkyl ether as the nonaqueous solvent.

Abstract: A lithium secondary battery including a positive electrode which is capable of occluding and releasing lithium, a negative electrode which is capable of occluding and releasing lithium, a separator between the positive electrode and the negative electrode, and a nonaqueous electrolyte comprising a nonaqueous solvent and a wettability improving agent. The nonaqueous solvent does not substantially wet the separator, and the wettability improving agent is dissolved in the nonaqueous solvent, improves the wettability of the nonaqueous solvent to the separator, and has an oxidative decomposition potential in a range of 4.5 V to 6.2 V.

Abstract: A nonaqueous electrolyte battery includes a positive electrode containing a positive electrode active material which is capable of occluding and releasing lithium, a negative electrode containing a main active material which is capable of occluding and releasing lithium, and a current collector of copper, wherein the negative electrode contains a subsidiary active material which supplies lithium from the negative electrode to the positive electrode at an overdischarge condition. This arrangement makes it possible to prevent deterioration of battery characteristics caused by overdischarge without using an external device such as a protective element or protective circuit.

Abstract: An object of the invention is to provide a non-aqueous electrolyte secondary battery having a plateau in voltage in the 4-V region well comparable to that of lithium cobalt oxide, a high energy density, and cell characteristics such as safety, cycle properties, and high temperature storage properties.

Abstract: A positive electrode for a non-aqueous electrolyte cell containing spinel-type lithium manganese oxide as a main active material, wherein the positive electrode is comprised of a mixture of spinel-type lithium manganese oxide represented by a formula Li1+xMn2−YO4 (provided that the atomic ratio of lithium and manganese is determined to be 0.56≦Li/Mn [=(1+X)/(2−Y)]≦0.62, X is determined to be−0.2≦X≦0.2, and Y is determined to be Y≦1.0) and at least either one of lithium cobalt oxide represented by a formula Li1+ZCoO2 (provided that Z is determined to be−0.5≦Z≦0.5) or lithium nickel oxide represented by a formula Li1+ZNiO2 (provided that Z is determined to be−0.5≦Z ≦0.

Abstract: A nonaqueous electrolyte secondary battery according to the invention comprises a positive electrode containing a positive electrode active material including lithium containing composite oxide having a layer crystal structure represented by a general formula of LixMnaCobMcO2(0.9≦X≦1.1, 0.45≦a≦0.55, 0.45≦b≦0.55, 0<c≦0.05 and 0.9<a+b+c≦1.1 are set and M is at least one kind selected from Al, Mg, Sn, Ti and Zr), a negative electrode containing a negative electrode active material capable of intercalating and deintercalating lithium ion, a separator for separating the positive electrode from the negative electrode, and a nonacqueous electrolyte.

Abstract: A non-aqueous secondary battery comprising a negative electrode made of an active negative electrode material capable of intercalating/deintercalating lithium ion, a positive electrode made of spinnel type lithium manganese oxide as a main active positive electrode material and an electrolyte containing a non-aqueous solvent is characterized in that said positive electrode comprises lithium cobalt oxide in admixture with spinnel type lithium manganese oxide having crystal lattices partially substituted by magnesium or aluminum and said non-aqueous solvent comprises vinylene carbonate incorporated therein.

Abstract: The invention provides a non-aqueous electrolyte cell having a high working voltage in a low temperature range of 0° C. or below and thereby attaining excellent low temperature discharge characteristics, a reduced internally-generated gas, and an excellent safety against heat. This is achieved by a cell comprising a non-aqueous electrolyte containing propylene carbonate and LiN(SO2C2F5)2 as an electrolyte salt, a graphite negative electrode, and a positive electrode having a positive electrode active material comprising a Ti-attached LiCoO2 in which a particle of titanium and/or titanium compound is attached on a surface of a particle of lithium cobalt oxide and a mole ratio of titanium and/or titanium compound in the Ti-attached LiCoO2 is within the range of from 0.00001 to 0.02.