Electrophoretic fabrication of positive electrodes for rechargeable lithium batteries

LiCoO2 and LiMn2O4 composite electrodes for rechargeable lithium batteries were fabricated by an electrophoretic deposition (EPD) method. Oxide partic les were deposited on an Al current collector with appropriate amounts of k etjen black and polytetrafluoroethylene by applying a high dc voltage betwe en two electrodes in an EPD suspension. The electrode densities were compar able to those for electrodes prepared by a conventional process. The LiCoO2 and LiMn2O4 electrodes exhibited initial discharge capacities of 140 and 1 10 mAh g(-1), respectively. The particles adhered strongly to the Al curren t collectors. From these results, it can be concluded that the EPD method c an be applied as a practical fabrication process for rechargeable lithium b attery electrodes. (C) 2000 The Electrochemical Society. S1099-0062(00)01-0 75-0. All rights reserved.