Electronics and Telecommunications Research Institute

Xiang Lan Wu

Kwang Man Kim

Young Gi Lee

Nam Gyu Park

Kwang Sun Ryu

Soon Ho Chang

Yong Joon Park

Young Sik Hong

Man Gu Kang

A cathode active material for a lithium secondary cell used in a cellular phone is disclosed. The cathode active material for the lithium secondary cell and the method the same having a high capacity and a long lifetime, different from LiCoOand LiMnO, Li(Ni, Co)O, and V-system oxide that has been researched as the active material for substituting LiCoOare provided. The cathode active material for the lithium secondary cell in the next formula 1 is obtained by heating or chemically treating diadochite [Fe(PO)(SO)(OH).6HO] that is the mineral containing PO, SO, and OH.LiFeM(PO)(SO)(OH)&#x2003;&#x2003;(1) In the formula, M is at least one element selected from a radical consisting of Mg, Ti, Cr, Mn, Co, Ni, Cu, Zn, Al, and Si, with 0&#x2266;a, c&#x2266;0.5, 1&#x2266;b&#x2266;2, 0.5&#x2266;x, y, z&#x2266;1.5.

Cathode active material for lithium secondary cell and method for manufacturing the same

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Daejon-Shi, South Korea

Xiang Lan Wu