초록 ▼

A method of producing Liy[NixCo1-2xMnx]O2 wherein 0.025≦x≦0.5 and 0.9≦y≦1.3. The method includes mixing [NixCo1-2xMnx]OH2 with LiOH or Li2CO3 and one or both of alkali metal fluorides and boron compounds, preferably one or both of LiF and B2O3. The mixture is heated sufficie

A method of producing Liy[NixCo1-2xMnx]O2 wherein 0.025≦x≦0.5 and 0.9≦y≦1.3. The method includes mixing [NixCo1-2xMnx]OH2 with LiOH or Li2CO3 and one or both of alkali metal fluorides and boron compounds, preferably one or both of LiF and B2O3. The mixture is heated sufficiently to obtain a composition of Liy[NixCo1-2xMnx]O2 sufficiently dense for use in a lithium-ion battery cathode. Compositions so densified exhibit a minimum reversible volumetric energy characterized by the formula [1833-333x] measured in Wh/L.

대표청구항 ▼

The invention claimed is: 1. A method of producing Liy[NixCo1-2xMnx]O2 wherein 0.1≦x≦0.375, and 0.9≦y≦1.3, the method comprising: grinding a dry precipitate of [NixCo1-2xMnx]OH2 with a stoichiometric amount of LiOH.H2O or Li2CO3 and at least one boron compound as sintering a

The invention claimed is: 1. A method of producing Liy[NixCo1-2xMnx]O2 wherein 0.1≦x≦0.375, and 0.9≦y≦1.3, the method comprising: grinding a dry precipitate of [NixCo1-2xMnx]OH2 with a stoichiometric amount of LiOH.H2O or Li2CO3 and at least one boron compound as sintering agent to form a resulting mixture; and heating the resulting mixture until a sufficiently dense composition of Liy[NixCo1-2Mnx]O2 having a pellet density of from about 3.3 to about 3.5 g/m3 is obtained for use in a lithium-ion battery, to form a densified composition of Liy[NixCo1-2xMnx]O2, wherein the total amount of boron compound(s) is greater than 0.2% and up to about 10% of the total weight of the mixture. 2. The method of claim 1 wherein the resulting mixture is heated to at least about 900° C. 3. The method of claim 1 wherein the resulting mixture is heated for at least about 3 hours. 4. The method of claim 1 wherein the resulting mixture is heated for at least about 6 hours. 5. The method of claim 1 wherein the amount of sintering agent being mixed is about 0.2 to about 5.0 weight percent of the resulting mixture. 6. The method of claim 1 wherein the amount of sintering agent being mixed is in the range of about 0.2 to about 3.0 weight percent of the resulting mixture. 7. The method of claim 5 wherein the resulting mixture is heated for about 3 hours. 8. The method of claim 1 characterized by the resulting densified composition of Liy[NixCo1-2xMnx]O2, exhibiting a reversible volumetric energy of at least [1833-333x] measured in Wh/L. 9. The method of claim 1 wherein the pellet density of the resulting densified composition of Liy[NixCo1-2xMnx]O2 is at least about 72 percent of theoretical density. 10. The method of claim 1 wherein said sintering agent is selected from the group consisting of boron oxide, boric acid, and lithium borates.