Patent ID: 7815888
Filing Date: 2010-10-19
Classification: H01M,Y02E

Abstract:
1. A process for producing a secondary battery cathode material, which includes an alkali metal, a transition metal and oxygen, comprising the step of: calcining pulverized and mixed raw materials, wherein: said calcination step includes a first stage performed at a temperature that is raised from room temperature to a first calcination temperature between 300° C. and 450° C., and a second stage performed at a temperature that is raised from room temperature to a second calcination temperature between 500° C. and 800° C., the calcination step being completed at the second temperature, wherein the second stage is carried out after adding a substance which can form conductive carbon by pyrolysis to said raw materials, the substance being added to said raw materials after completing the first stage of said calcination step wherein said first and second stages are performed substantially in the absence of oxygen gas, in a gas atmosphere comprising an inert gas, and wherein one or more substances, which are selected from the group consisting of hydrogen, water and water vapor are added to the raw materials together with the inert gas at least during the second stage while the calcination temperature is 500° C. or higher.