Development of high energy density Li-ion batteries based on LiNi 1− x− yCo xAl yO 2

Abstract

Electrochemical characterisation of LiNi 1− x− y Co x Al y O 2 cathode material was conducted and a high reversible capacity of 184 mAh g −1 was obtained with good capacity retention. Evaluation of LiNi 1− x− y Co x Al y O 2 performance with a graphitic carbon anode was undertaken in several alternative high energy density Li-ion cell configurations. These included a D-size (33,600) cell design, a flat, “soft-packaged” 10 Ah cell design and a high capacity 75 Ah metal case cell design. Energy densities of 160, 150 and 130 W h kg −1 were achieved, respectively, for these cell designs. Further optimisation of these designs is envisaged to lead to projected energy densities, respectively, of 175, 180 and 150 W h kg −1.