Abstract: A lithium-containing composite nitride with an alkaline metal or an alkaline earth metal added thereto is used as the negative electrode active material, or used as surface layers of core particles of a lithium-containing composite nitride, to provide a negative electrode material for a nonaqueous electrolyte secondary battery with large capacity and high reliability improved in oxidation and decomposition resistance property and thus capacity recovery property after overdischarge.

Abstract: An electrode group for a battery including a positive electrode and a negative electrode wound into a spiral with a separator interposed therebetween, wherein the positive electrode includes a positive electrode current collector and positive electrode material mixture layers formed on both sides of the positive electrode current collector, the negative electrode includes a negative electrode current collector and negative electrode material mixture layers formed on both sides of the negative electrode current collector, a lead is connected to at least one of the positive electrode current collector and the negative electrode current collector, and at least one of step portions having difference in level formed in the electrode group by lengthwise ends of the positive electrode, the negative electrode and the separator and the periphery of the lead, respectively, is covered with an insulating member arranged on an inner circumference side or an outer circumference side of a turn of the electrode group.

Abstract: A non-aqueous electrolyte secondary battery comprises a negative electrode including a negative electrode active material, a positive electrode including a positive electrode active material, and a non-aqueous electrolyte; the positive electrode active material is LiNi1-y-zMnyCozO2, wherein y and z satisfy 0<y≦0.5, 0≦z≦0.5, and 0<y+z≦0.75; and an upper limit voltage for charging the non-aqueous electrolyte secondary battery is 4.25 to 4.70 V.

Abstract: 100 parts by weight of a carbon material having irreversible capacity and 20 to 150 parts by weight of a lithium-containing complex nitride represented by the general formula Li3-XMXN wherein M is at least one selected from the group consisting of Co, Ni, Mn and Cu, and wherein 0.2≦X≦0.8, are included in a negative electrode thereby to compensate for the irreversible capacity of the carbon material by the above-described nitride. This enables the maximum utilization of large capacity possessed by an amorphous carbon or low crystalline carbon, thereby making it possible to provide a non-aqueous electrolyte secondary battery having high capacity and excellent cycle reversibility.

Abstract: A lithium-containing composite nitride with an alkaline metal or an alkaline earth metal added thereto is used as the negative electrode active material, or used as surface layers of core particles of a lithium-containing composite nitride, to provide a negative electrode material for a nonaqueous electrolyte secondary battery with large capacity and high reliability improved in oxidation and decomposition resistance property and thus capacity recovery property after overdischarge.

Abstract: A non-aqueous electrolyte secondary battery using lithium containing composite oxide, which intercalates and de-intercalates lithium, for a positive electrode; and lithium containing composite nitride and a compound having a large irreversible capacity for a negative electrode. Metal oxide is used as a material for the negative electrode, and lithium containing composite nitride represented by the general formula of Li3−xMxN (M is a transition metal, 0.2<x≦0.8) is also contained in the negative electrode. Lithium containing composite nitride containing cobalt as its transition metal M is further preferable because it has high capacity and good reversibility. For the positive electrode of the secondary battery, lithium containing composite oxide such as lithium cobaltate, lithium nickelate, their composite compound, and lithium manganate (LiMn2O4) may be used.

Abstract: A paper coating composition comprising a polyvinyl alcohol resin containing acetoacetyl group prepared in the presence of a pigment having a pH of not more than 8. The composition of the invention gives heat sensitive recording paper which has increased color density, excellent plasticizer resistance and low adhesiveness to a thermal print head.

Abstract: A novel electroconductive material comprising a copolymer of (A) 30 to 90 % by mole of styrenesulfonic acid salt and (B) 70 to 10 % by mole of at least one of alkyl acrylates or methacrylates having an alkyl group of 1 to 10 carbon atoms and acrylonitrile or methacrylonitrile or a copolymer of (A) 40 to 70 % by mole of styrenesulfonic acid salt, (B) 5 to 20 % by mole of at least one of alkyl acrylates or methacrylates having an alkyl group of 4 to 10 carbon atoms and (C) 10 to 55 % by mole of at least one of styrene, acrylonitrile or methacrylonitrile and alkyl acrylates having an alkyl group of 1 to 3 carbon atoms. The electroconductive material has a superior solvent-resistance and antiblocking property as well as electroconductivity and is useful for an electroconductive, photoconductive and other related copying systems.