Fig. 7From: Carbon and Binder-Free Air Electrodes Composed of Co3O4 Nanofibers for Li-Air Batteries with Enhanced Cyclic PerformanceFT-IR spectra of the standard and Co3O4-nanofiber electrodes collected after the first discharging and charging processes, and after the 50th cycle (spectra collected in the charged state). a Standard electrode. b Co3O4-nanofiber electrodeBack to article page