Positive electrode active material and non-aqueous electrolyte secondary battery containing the same
AssigneePanasonic Corporation
InventorsTsutomu Ohzuku, Hiroshi Yoshizawa, Masatoshi Nagayama
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Abstract
The present invention provides a high-capacity and low-cost non-aqueous electrolyte secondary battery, comprising: a negative electrode containing, as a negative electrode active material, a substance capable of absorbing/desorbing lithium ions and/or metal lithium; a separator; a positive electrode; and an electrolyte, wherein the positive electrode active material contained in the positive electrode is composed of crystalline particles of an oxide containing two kinds of transition metal elements, the crystalline particles having a layered crystal structure, and oxygen atoms constituting the oxide forming a cubic closest packing structure.
Claims5
A method for producing a positive electrode active material for a non-aqueous electrolyte battery comprising the steps of:
- introducing an aqueous alkaline solution comprising sodium hydroxide and ammonia and an aqueous solution containing a nickel sulfate, a manganese sulfate and a cobalt sulfate simultaneously into a reactor;
- coprecipitating said nickel, said manganese and said cobalt while passing an inert gas therethrough to obtain a nickel manganese cobalt hydroxide and/or a nickel manganese cobalt oxide;
- mixing said nickel manganese cobalt hydroxide and/or said nickel manganese cobalt oxide with a lithium compound to obtain a mixture;
- and
- heating said mixture at a temperature not lower than 900° C. to obtain a positive electrode material.
Dependencies are inferred from the claim text.