In this work, multi-walled carbon nanotube array electrodes were prepared by chemical vapor decomposition (CVD) in nano-sized porous alumina membranes (the diameter of the pore is about 55 rim). The intercalation behavior of Li+ in the array electrodes was also primarily investigated. The importance of selection of current collectors for the study of Li+-intercalation processes in carbon nanotube array electrodes was stressed. Since carbon nanotube array electrodes can give high current density due to its high surface area and ordered electrode configuration, which may be used in some fields such as chemical sensors and micro-battery. (C) 2002 Published by Elsevier Science B.V.