Patent number: 6372385
Abstract: Disclosed is active material for a positive electrode used in lithium secondary batteries of Formula 1 below and a method manufacturing the same, a surface of the active material being coated with metal oxide. The method includes the steps of producing a crystalline powder or a semi-crystalline powder of Formula 1; coating the crystalline powder or the semi-crystalline powder with metal alkoxide sol; and heat-treating the powder coated with the metal alkoxide sol.
LiA1−x−yBxCyO2 (Formula 1)
where 0<x≦0.3, 0≦y≦0.01, and
A is an element selected from the group consisting of Ni, Co and Mn; B is an element selected from the group consisting of Ni, Co, Mn, B, Mg, Ca, Sr, Ba, Ti, V, Cr, Fe, Cu and Al; and C is an element selected from the group consisting of Ni, Co, Mn, B, Mg, Ca, Sr, Ba, Ti, V, Cr, Fe, Cu and Al.
Type:
Grant
Filed:
February 10, 1999
Date of Patent:
April 16, 2002
Assignee:
Samsung Display Devices Co., Ltd.
Inventors:
Ho-jin Kweon, Sung-soo Kim, Geun-bae Kim, Dong-gon Park