The zeta potential, which is the overall charge a particle acquires in a specific medium, is a good indicator of the stability of the colloidal system. The zeta potential of colloidal dispersions of LiCo0.5Fe0.5O2 in water (Fig. 7) was measured. The isoelectric point (IEP) was found to be at pH = 6.3. The colloidal system is the least