Manufacturing method of spinel lithium manganese oxide for lithium secondary cell
AssigneeSaga Prefectural Regional Industry Support Center
InventorsMasaki Yoshio, Hideyuki Noguchi, Yasufumi Hideshima, Hiroyoshi Nakamura
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Abstract
A manufacturing method of spinel type manganese oxide for a lithium ion secondary cell, includes pre-firing a mixture of lithium salt including lithium carbonate, manganese oxide, and heterogeneous metal, firing the mixture at 900 to 1200° C. to form a raw material, adding in the raw material at least one of crystal growth accelerators selected from the group consisting of lithium hydroxide, lithium sulfide and a mixture thereof, and firing the resulting compound at 750 to 850° C. to form an excess lithium heterogeneous metal-doped spinel compound having a BET specific surface area of 0.5 m2/g or less.
Claims10
A manufacturing method of a lithium manganese oxide spinel for a lithium ion secondary cell, comprising the steps of:
- pre-firing a mixture of lithium sat including lithium carbonate, manganese oxide, and a heterogeneous metal;
- firing said mixture at 900 to 1200° C. to form a raw material;
- adding to said raw material at least one crystal growth accelerator selected from the group consisting of lithium hydroxide, lithium sulfide and a mixture thereof to form a resulting compound;
- and
- firing said resulting compound at 750 to 850° C. to form an excess lithium heterogeneous metal-doped lithium manganese oxide spinel compound having a BET specific surface area of 0.5 m2/g or less.
Dependencies are inferred from the claim text.