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US 5,795,558 AGranted
Positive electrode active material for lithium secondary battery method of producing
AssigneeJapan Storage Battery Co., Ltd.
InventorsTakashi Aoki, Mikito Nagata, Hisashi Tsukamoto
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Abstract
A positive electrode active material for a lithium secondary battery is made of LiNi.sub.1-x-y-z Co.sub.x Mn.sub.y Al.sub.z O.sub.2, in which x, y and z satisfy relations of 0.ltoreq.y.ltoreq.0.3, 0.ltoreq.x.ltoreq.0.25, 0.ltoreq.z.ltoreq.0.15.
Claims8
A method of producing a positive electrode active material for a lithium secondary battery comprising the steps of:
- mixing at least one of .beta.-Ni.sub.1-x Co.sub.x (OH).sub.2 and .beta.-Ni.sub.1-x Co.sub.x OOH in which x and y satisfy relations of 0.ltoreq.y.ltoreq.0.3 and 0.ltoreq.x.ltoreq.0.25, a Li supply source material which is a Li chemical compound used at a time of forming Li--Ni--Co--Al composite oxide, and an Al supply source material which is an Al chemical compound used at a time of forming Li--Ni--Co--Al composite oxide;
- and
- burning the resulting mixture.
Dependencies are inferred from the claim text.