Composite particles for an
electrode of the invention are produced through a granulating step in which, a conductive additive and a binder are brought into a
close contact with particles consisting of the
electrode active material to integrate with each other. The granulating step preferably comprises a process for preparing a
stock solution comprising the binder, the conductive additive and a
solvent, a process for forming a
fluidized bed by throwing particles of
electrode active material into a fluidizing bathe and a process for bringing the particles of electrode active material and the particles of conductive additive into a
close contact with the binder by spraying a
stock solution into the fluidizing bathe, allowing the
stock solution adhering to the particles of electrode active material and
drying the same to remove the
solvent from the adhered stock solution. Composite particles thus obtained are used as the constituent material for electrode, and further, the electrode is used as an
anode and / or
cathode of an electrochemical element; thereby, the
internal resistance of electrode can be reduced satisfactorily and the
power density of the electrochemical element can be increased satisfactorily.