Research Article

Improved Electrochemical Performance of Li1.25Ni0.2Co0.333Fe0.133Mn0.333O2 Cathode Material Synthesized by the Polyvinyl Alcohol Auxiliary Sol-Gel Process for Lithium-Ion Batteries

Figure 6

Cathodic EIS spectra of Li1.25Ni0.2Co0.333Fe0.133Mn0.333O2 (x = 0.0 and 10.0 wt%) materials. The inset shows the cathodic EIS spectra in the low-z’ region.