Main Article Content

<b>PREPARATION OF NICKEL - COBALT SPINEL OXIDES Ni<sub>x</sub>CO<sub>3-x</sub>O<sub>4</sub>.COMPARISON OF TWO PHYSICAL PROPERTIES STEMMING FROM FOUR DIFFERENT PREPARATION METHODS AND USING CARBON PASTE ELECTRODE</b>


Makhtar Guene
Abdou Aziz Diagne
Modou Fall
Mor Marème Dieng
Gérard Poillerat

Abstract

A comparative study of two electro-physical properties (porosity and electrical conductivity) of binary nickel cobalt oxides electrodes with spinels mixed oxides NixCo3-xO4 as active matter, was carried out. Four different routes were used to prepare spinel-type NixCo3-xO4 (0 ≤ x ≤ 2.5) compounds in order to link these properties with the preparation method. The substitution of Ni for Co increases the conductivity and the porosity of the electrode till a certain ratio of nickel. X-ray diffraction patterns showed that the oxides crystallize in a cubic spinel phase. Electrical conductivity as well as porosity depends on the preparation route.

KEY WORDS: Nickel cobalt spinel oxides, Porosity, Electrical conductivity, Mixed oxides electrodes, Carbon paste electrode, Pechini sol-gel method


Bull. Chem. Soc. Ethiop. 2007, 21(2), 255-262.
     View our Diamond Open Access Survey (closes on February 29, 2024)


Journal Identifiers


eISSN: 1726-801X
print ISSN: 1011-3924