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US 4,959,282 AGranted
Cathode active materials, methods of making same and electrochemical cells incorporating the same
AssigneeMoli Energy Limited
InventorsJeffery R. Dahn, Brian M. Way
Life of this patent
Estimating the term…
Abstract
Cathode-active material for electrochemial cells is prepared by reacting gamma phase MnO.sub.2 with Li. The molar ratio of Li to MnO.sub.2 is about 0.33 to about 0.43.
Claims19
A method of making a cathode active material for an electrochemical cell comprising the steps of providing a substantially dry intermediate including a lithium-containing compound and gamma MnO.sub.2 at a mean molar ratio of lithium to gamma MnO.sub.2 of about 0.33 to about 0.43 and heat-treating said intermediate in a drying atmosphere above about 300.degree. C.
A cathode-active material according to claim having R.sub.45/37 less than about 0.15.
Dependencies are inferred from the claim text.