Method of preparing layered lithium-chromium-manganese oxides for lithium batteries
AssigneeElectronics and Telecommunications Research Institute
InventorsXianglan Wu, Yong Joon Park, Kwang Sun Ryu, Soon Ho Chang, Young-Sik Hong
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Abstract
A method of preparing layered lithium-chromium-manganese oxides having the formula Li[CrxLi(1/3-x/3) Mn(2/3-2x/3)]O2 where 0.1≦X≦0.5 for lithium batteries. Homogeneous precipitation is prepared by adding lithium hydroxide (LiOH) solution to a mixed solution of chromium acetate (Cr3(OH)2(CH3CO2)7) and manganese acetate ((CH3CO2)2Mn.4H2O), while precursor powders are prepared by firing the precipitation. After that, the precursor powders are subjected to two heat treatment to yield Li[CrxLi(1/3-x/3) Mn(2/3-2x/3)]O2 with α-LiFeO2 structure.
Claims8
A method of preparing layered lithium-chromium-manganese oxides for lithium batteries, comprising the steps of:
- preparing a homogeneous precipitation by adding lithium hydroxide (LiOH) solution to a mixed solution of chromium acetate (Cr3(OH)2(CH3CO2)7) and manganese acetate ((CH3CO2)2Mn.4H2O);
- preparing precursor powders having the formula Li[CrxLi(1/3-x/3)Mn(2/3-2x/3)]O2 where 0.1≦X≦0.5 by firing the homogeneous precipitation;
- and
- preparing layered oxide powders by heat treating the precursor powders.
Dependencies are inferred from the claim text.