Structural and Electrochemical Investigation of Li1.02Mn1.92Al0.02Fe0.02Cr0.02 () Synthesized by Solid-State Method
Figure 6
AC impedance experiments measured for the spinel (a) Li/LiMn2O4, (b) Li/Li1.02Mn1.92Al0.02Fe0.02Cr0.02O4, and (c) Li/Li1.02Mn1.92Al0.02Fe0.02Cr0.02O3.92F0.08 electrodes at the potential V before and after 50 cycles.