2005 Volume 73 Issue 3 Pages 199-201
A liquid organic electrolyte system for lithium ion batteries with LiCoO2 cathode containing phenyl group compounds as electrolyte additives has been studied. Cycle performance of LiCoO2 cathode charged to 4.5 V using electrolyte with additives were increased remarkably in comparison with that of electrolyte without additives. The correlation between the highest molecular orbitals (HOMO) energy and the oxidation potential of the additives is roughly linear.