An electrode material for an electrochemical device comprising a composite
of a particulate conductive material and a metal oxide is prepared by
mixing and dispersing the particulate conductive material with a
colloidal solution of an oxide of an element in a range of from Group 3
to Group 12 in the fourth, fifth and sixth periods of the Periodic Table
and heating the mixture. This composite has a high capacity even at a
high current density and good filling properties, and is useful as an
electrode material for an electrochemical device such as a lithium
secondary battery or an electrochemical capacitor. When the electrode
material comprising this composite is used, an electrode can be produced
without any binder, and the electrochemical device having good output
characteristics can be constructed.