Process for the preparation of olivine lithium nickel...

Details Process for the preparation of olivine lithium nickel... Process for the preparation of olivine lithium nickel...

2001-03-28

2002-11-26

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

Reexamination Certificate

active

06485699

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a process for the preparation of olivine lithium nickel phosphate (LiNiPO
4
) composite, which is very useful for high voltage lithium reversible cells. LiNiPO
4
is a reversible cathode material useful for high voltage cells of lithium in non-aqueous media.
BACKGROUND OF THE INVENTION
In all the procedures available in the literature several disadvantages are observed:
1. Phase impurity
2. Longer duration of thermal preparation
3. High temperature of operation
4. pH control
5. Several steps of preparation
OBJECTS OF THE INVENTION
The main object of this invention is to synthesis olivine LiNiPO
4
under suitable solid state reaction method which obviates the defects and draw backs hither to known in other methods of preparation of this compound from already known procedures in literatures.


REFERENCES:
patent: 5910382 (1999-06-01), Goodenough et al.

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