Figure 4

Electrochemical performances of LiNixMg0.08Mn1.92−xO4 samples: (a) initial charge-discharge curves, (b) cyclic performances at 1 C, and (c) rate capability at 25 °C, (d) the cyclic performances of LiMg0.08Mn1.92O4 and LiNi0.03Mg0.08Mn1.89O4 samples at 20 C and (e) the cyclic performances of LiNi0.03Mg0.08Mn1.89O4 sample at various current rate and 55 °C.