Electrophoretic fabrication of LiCoO2 positive electrodes for rechargeablelithium batteries

LiCoO2 composite electrodes for rechargeable lithium batteries were fabrica ted by an electrophoretic deposition (EPD) method. LiCoO2 oxide particles w ere deposited on an Al current collector with appropriate amounts of Ketjen black and polytetrafluoroethylene (PTFE) by applying a high de voltage bet ween two electrodes in an EPD suspension. The density of the composite elec trode was comparable with that for an electrode prepared by a conventional process. The LiCoO2 electrode exhibited an initial discharge capacity of 14 2 mAh g(-1). The cycleability of the LiCoO2 electrode prepared by the EPD w as also equivalent to those of pellet type electrodes. From these results, it is concluded that the EPD method can be applied as the practical electro de fabrication process for a rechargeable Lithium battery. (C) 2001 Elsevie r Science B.V. All rights reserved.