The characteristics of Ni-Co-Mn-O precursor and Li(Ni1/3Co1/3Mn1/3)O2 cathode powders prepared by spray pyrolysis

Ni-Co-Mn-O precursor powders with spherical shape and dense structure were prepared by spray pyrolysis from a spray solution containing a drying control chemical additive (DCCA) and polymeric precursors. In contrast, the Ni-Co-Mn-O precursor powders obtained from a spray solution without additives had a hollow and porous morphology. Ni-Co-Mn-O precursor powders with a spherical shape and dense structure yielded Li(Ni1/3Co1/3Mn1/3)O-2 cathode powders with a spherical shape and fine size by means of a solid-state reaction with lithium hydroxide. The mean size of the spherical cathode powder was 1.1 mu m. The discharge capacity of the Li(Ni1/3Co1/3Mn1/3)O-2 powders with spherical shape and filled morphology was 195 mA h g(-1) at a current density of 0.1 C. The discharge capacities of the cathode powders with spherical shape and filled morphology at 55 degrees C decreased from 183 to 154 mA h g(-1) by the 30th cycle at a current density of 0.5 C. (C) 2008 Elsevier Ltd and Techna Group S.r.l. All rights reserved.