Patent ID: 8382860
Filing Date: 2013-02-26
Classification: C01G,C01P,H01M,H02J,Y02E,Y02P,Y10T

Abstract:
1. A process for producing a lithium secondary battery, comprising: preparing the lithium secondary battery including a positive electrode having an active material comprising a solid solution of a lithium transition metal composite oxide having an α-NaFeO wherein a composition ratio of Li, Co, Ni, and Mn contained in the solid solution satisfies Li in an Li[Li an intensity ratio between diffraction peaks on (003) plane and (104) plane measured by X-ray diffractometry before charge-discharge is 2.25≧l charging the positive electrode of the lithium secondary battery in an initial charge-discharge process after preparing the lithium secondary battery and before an actual usage, the positive electrode of the lithium secondary battery being charged in said initial charge-discharge process to reach at least a region with relatively flat fluctuation of potential appearing relative to a charging electric amount in a positive electrode potential region, and exceeding 4.3V (vs. Li/Li wherein in charging the battery in the actual usage after said initial charge-discharge process, the positive electrode of the lithium secondary battery is always charged at a maximum achieved potential of 4.3V (vs. Li/Li