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US 5,531,920 AGranted
Method of synthesizing alkaline metal intercalation materials for electrochemical cells
AssigneeMotorola, Inc.
InventorsZhenhau Mao, Dee Newton
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Abstract
A method for preparing an alkaline metal transition metal oxide charge storage material for electrochemical cells. The material may be used in a lithium rechargeable electrochemical cell along with a conventional lithium intercalation electrode. The material may be prepared by providing a transition metal hydroxide and reacting it with a alkaline metal containing oxidizing agent. The ratio of the transition metal to the alkaline metal should be approximately 0.5:1 to 1.2:1.
Claims5
A method of fabricating an alkaline metal intercalation, transition metal oxide material of the formula:
- A.sub.x TMO.sub.2
- wherein A is an alkaline metal selected from the group of Li, Na, K, and combinations thereof, TM is a transition metal selected from the group of Ti, V, Mn, Cr, Fe, Ni, Co, and combinations thereof, and wherein 0.5.ltoreq.x.ltoreq.1.2, said method comprising the steps of:
- combining a transition metal hydroxide of the formula TM(OH).sub.2 with an alkaline metal-containing oxidizing agent selected from the group of Li.sub.2 O.sub.2, LiNO.sub.3, LiClO.sub.4, Na.sub.2 O.sub.2, K.sub.2 O.sub.2, and combinations thereof, in the presence of a liquid organic solvent;
- removing said organic solvent to collect a powdered alkaline metal intercalation transition metal oxide material;
- and
- calcining said powdered material in an oxygen free, inert gas atmosphere.
3 more elements
Dependencies are inferred from the claim text.