Experimental design method applied to Li/LiCoO2 rechargeable cells

An L8 experimental design matrix was used to investigate the effects of seven different control factors on the performance of Li/LiCoO2 rechargeable cells. These factors included the source of LiCoO2, type of conductive additives, ratio of carbon black, positive electrode density, interelectrode spacing, charging voltage, and electrolyte system. The contribution of individual control factor to cell cycle life is determined by the Taguchi methods. From the results of Taguchi analysis, there are four main control factors that have a great impact on the cell performance. It is shown that the source of LiCoO2, type of conductive additives, ratio of carbon black, and charging voltage have a significant contribution to cell performance. (C) 1997 Elsevier Science S.A.