Preparation and characterization of LiNiO2 synthesized from Ni(OH)(2) and LiOH center dot H2O

Synthesis of LiNiO2 by heat-treatment of Li(OH). H2O and Ni(OH)(2) is repor ted. The influence of synthesis conditions on the electrochemical performan ce of the resulting LiNiO2 is investigated. Thermal analysis of the synthes is process shows that LiNiO2 formation proceeds through the transformation of Ni(OH)(2) to a layered compound Ni1-x(OH)(2-x), followed by solid reacti on with LiOH. The most favorable condition is heating a mixture of Li(OH). H2O and Ni(OH)(2) at 650 degrees C, and then at 720 degrees C in oxygen. Th e resulting LiNiO2 exhibits a considerably high discharge capacity of 145 m A h g(-1) and a sufficiently long cycle-life when cycled over a lithium com position range of 0.2 less than or equal to x less than or equal to 0.65. ( C) 1999 Elsevier Science S.A. All rights reserved.