Layer structure oxide

Details Layer structure oxide Layer structure oxide

1994-07-12

1996-04-02

Robinson, Ellis P.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

428689, 428699, 428700, 428701, 428702, 429218, 429221, 429223, 429228, B32B 1504, B32B 1800, H01M 452

Patent

active

055039308

ABSTRACT:
In a layer structure oxide in crystallite form having a composition of the formula: AMO.sub.2 wherein A is Li or Na and M is Co, Ni, Fe or Cr, at least one additive element Z which is Bi, Pb or B is present in the form of an oxide on the surface of crystallites or between crystallites. Atomic ratio Z/M is from 0.0001 to 0.1. Since the crystallites have an increased size, the layer structure oxide has improved properties and is suitable for use as a positive electrode material of a secondary cell.

REFERENCES:
patent: 4567031 (1986-01-01), Riley
patent: 5286582 (1994-02-01), Tahara
patent: 5378560 (1995-01-01), Tomiyama
Database WPI, Derwent Publications, AN-88-289203, JP-63-211565, Sep. 2, 1988.

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