The control of nonstoichiometry in lithium nickel–cobalt oxides

Abstract The nonstoichiometry of layered Li 1− x (Ni 0.8 Co 0.2 ) 1+ x O 2 has been controlled by varying the starting composition and preparation temperature. X-ray and neutron powder diffraction has been used to determine the composition of the materials prepared, and the electrochemical properties have been examined.