The nonstoichiometry of layered Li1-x(Ni0.8Co0.2)(1+x)O-2 has been controll
ed by varying the starting composition and preparation temperature. X-ray a
nd neutron powder diffraction has been used to determine the composition of
the materials prepared, and the electrochemical properties have been exami
ned. (C) 1999 Elsevier Science S.A. All rights reserved.