Abstract: When spinel-type lithium cobaltate is applied as cathode active material for a lithium ion battery, a spinel-type crystal phase is unstable and is easy to be dislocated to a layered rock-salt structure, which makes it easy to impair battery properties. Thus, manganese is partially substituted for cobalt in spinel-type lithium cobaltate, to achieve stabilization of the spinel-type crystal phase. Specifically, cathode active material is used in a lithium ion battery, the cathode active material including: a composite oxide of lithium and transition metal, wherein the transition metal consists of cobalt as a main constituent, and manganese, and the composite oxide has a spinel-type crystal phase that is formed of lithium, cobalt, manganese, and oxygen.

Abstract: A lithium secondary battery (10) includes a positive electrode active material of lithium transition metal oxide which contains at least a nickel element and a manganese element as transition metals and for which, with respect to a diffraction peak A located at a diffraction angle 20 of 17° to 20° and a diffraction peak B located at a diffraction angle 2? of 43° to 46° from X-ray diffraction measurements, when the integrated intensity ratio is R1=IA/IB, the peak intensity ratio is RH=HA/HB, and the ratio between the integrated intensity ratio R1 and the peak intensity ratio RH is SF=RH/R1>> the SF satisfies 1.1?SF?2.2.

Abstract: Provided is a cathode active material for a non-aqueous electrolyte secondary battery, with which it is possible to improve the output characteristics during use in extremely low-temperature environments. A lithium compound is mixed with nickel cobalt manganese composite hydroxide particles that are expressed by the general formula: NixCoyMnzMt(OH)2+a (where x+y+z+t=1, 0.30?×?0.70, 0.10 ?y?0.40, 0.10 ?z?0.40, 0?t?0.01, and M is one or more elements selected from Mg, Ca, Al, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W) such that the ratio of the number of lithium atoms to the total number of atoms of metal elements other than lithium is 1:0.95 to 1.20. The lithium mixture undergoes calcination in an oxidizing atmosphere so that the rate of temperature rise in a temperature range of at least 30° C. to 800° C. is 4° C. /min to 10° C./min, the calcination temperature is 800° C. to 1000° C.

Abstract: A lithium secondary battery (10) includes a positive electrode active material of lithium transition metal oxide which contains at least a nickel element and a manganese element as transition metals and for which, with respect to a diffraction peak A located at a diffraction angle 20 of 17° to 20° and a diffraction peak B located at a diffraction angle 2? of 43° to 46° from X-ray diffraction measurements, when the integrated intensity ratio is R1=IA/IB, the peak intensity ratio is RH=HA/HB, and the ratio between the integrated intensity ratio R1 and the peak intensity ratio RH is SF=RH/R1>> the SF satisfies 1.1?SF?2.2.

Abstract: A coin type battery 20 is provided with a cup-shaped battery case 21, a positive electrode 22 disposed in the inside of this battery case 21, a negative electrode 23 disposed at a location opposite to the positive electrode 22 with a separator 24 therebetween, a nonaqueous electrolytic solution 27 containing a supporting electrolyte, a gasket 25 formed from an insulating material, and an opening-sealing plate 26, which is disposed at an opening portion of the battery case 21 and which seals the battery case 21 with the gasket 25 therebetween. Here, the negative electrode 23 includes an oxide represented by a basic composition LiNi1-xMnxO2 (0<x<0.5) as a negative electrode active material. It is preferable that the valence of Ni contained in the oxide is 2 and 3, and the valence of Mn is 4.

Abstract: A compound having the formula LiaNa2?aFePO4F, wherein 0<a?2 may be synthesized by exchanging lithium ions for sodium ions in Na2FePO4F. The compound may be used as a cathode material for a lithium ion battery. A battery may be comprised of an electrode active material having the formula Li2FePO4F, an anode; and an electrolyte. Na2FePO4F may be synthesized by flux reaction. Microcrystalline Na2FePO4F may be synthesized by a solution method. Na2FePO4F may be used as a cathode material for a lithium ion battery and may be carbon composite coated.