Compositions – Electrically conductive or emissive compositions – Metal compound containing
Reexamination Certificate
2007-06-26
2007-06-26
Kopec, Mark (Department: 1751)
Compositions
Electrically conductive or emissive compositions
Metal compound containing
C252S182100, C252S519100, C252S500000, C429S231300, C429S231100, C423S594500, C428S402000, C428S403000, C427S126300, C427S126600
Reexamination Certificate
active
10487861
ABSTRACT:
This invention relates to complex lithium metal oxides, which are cathode active materials of a lithium or lithium ion secondary battery with enhanced cycle life and safety, and a process for preparation thereof. The core particles are complex lithium metal oxides capable of absorbing, storing and emitting lithium ions, and a coating layer comprised of amorphous complex lithium cobalt oxides that are formed on the surface of the core particle, which is structurally stable and inactive with electrolytes. Because the amorphous complex lithium cobalt oxides are inactive with electrolytes, the oxides stabilize the surface structure of the complex lithium metal oxide and improve on high temperature storage properties, as well as safety and cycle life.
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Kim Jin On
Kwon Yong Hoon
Lee Ki Young
Park Hong-Kyu
Park Seong Yong
Birch & Stewart Kolasch & Birch, LLP
Kopec Mark
LG Chem. Ltd.
Vijayakumar Kallambella
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