Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Reexamination Certificate
2006-04-11
2006-04-11
Bell, Bruce F. (Department: 1746)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
C429S231950
Reexamination Certificate
active
07026070
ABSTRACT:
A positive electrode active material for a secondary battery contains a spinel lithium manganese composite oxide expressed by a general formula of Lia(MxMn2−x−yAy)O4where x and y are positive values which satisfy 0.4<x, 0<y, x+y<2, and 0<a<1.2. “M” denotes Ni and at least one metal element selected from the group consisting of Co, Fe, Cr and Cu. “A” denotes at least one metal element selected from the group consisting of Si and Ti. The ratio y of A has a value of 0.1<y in case where A includes only Ti. Accordingly, it is possible to acquire a material for the positive electrode of a lithium ion secondary battery, which has a high capacity and a high energy density with a high voltage of 4.5 V or higher with respect to Li.
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Korean Office Action dated Sep. 20, 2004.
Noguchi Takehiro
Numata Tatsuji
Bell Bruce F.
Katten Muchin Roseman LLP
NEC Corporation
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