Sacrificed template synthesis of Li<subscript>1.2</subscript>Ni<subscript>0.13</subscript>Co<subscript>0.13</subscript>Mn<subscript>0.54</subscript>O<subscript>2</subscript> spheres for lithium-ion battery cathodes.

Porous and solid Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 spheres have been prepared by spherical Ni 0.13 Co 0.13 Mn 0.54 (CO 3 ) 0.8 and MnO 2 -sacrificed templates route. X-ray diffraction profiles show two kinds of Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 spheres have good layered structure with solid solution characteristic. Scanning electron microscope images reveal that the porous Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 spheres obtained from spherical carbonate precursor are composed of well-defined primary nanoparticles. These nanoparticles have the size of 100–300 nm, and some porous structure can be observed among these particles on the surface. The solid spheres obtained from MnO 2 are made of tightly clustered nanoparticles. As lithium-ion battery cathodes, the porous spheres exhibit a high initial discharge capacity of 255.7 mAh g −1 at 0.1 C between 2.0 and 4.8 V. After 50 cycles, a discharge capacity of 177.7 mAh g −1 could be retained at 0.5 C. Even at high charge–discharge rate of 5 C (1,000 mA g −1 ), 121.4 mAh g −1 can be reached. But the solid spheres only deliver initial discharge capacity of 159.9 mAh g −1 at 0.1 C. Anyway, the different electrochemical performances of two samples should be attributed to the use of different sacrificed templates. [ABSTRACT FROM AUTHOR]

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