Material for positive electrode and secondary battery

Details Material for positive electrode and secondary battery Material for positive electrode and secondary battery

2006-05-16

2006-05-16

Crepeau, Jonathan (Department: 1746)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S224000, C429S231100, C429S231300

Reexamination Certificate

active

07045251

ABSTRACT:
Disclosed is a non-aqueous electrolyte secondary battery having an excellent preservation characteristic at a high temperature and charging/discharging cycle characteristic.A rolled body in which a strip-shape positive electrode and negative electrode are rolled with a separator in-between is provided inside a battery can. The positive electrode contains LixMn2−yMayO4(where, Ma is at least one element selected from the group consisting of metal elements other than Mn, and B) and LiNi1−zMbzO2(where, Mb is at least one element selected from the group consisting of metal elements other than Ni, and B). By replacing part of Mn and Ni with other elements, the crystal structure can be stabilized. Thereby, the capacity retention ratio after preservation at a high temperature, and a heavy load discharging power under a high electric potential cutoff can be improved. The mean particle size of particles of the above-mentioned oxides are preferable to be 30 μm and below so that an excellent charging/discharging cycle characteristic can be obtained.

REFERENCES:
patent: WO 99/59214 (1999-11-01), None

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