To Study the Effect of LiMn2O4, Nanofibers of LiMn2O4, and Graphene/Polyaniline/Carbon Nanotube as Electrode Materials in the Fuel Cell

This study is conducted to explore the best electrodes materials for energy conversion devices. The two cathode materials (LiMn2O4 and nanofibers of LiMn2O4) and the anode material (graphene/polyaniline/carbon-nanotube) were synthesized by a wet chemical method which includes sol-gel and chemical polymerization techniques. The prepared materials were characterized by SEM, XRD FTIR, and cyclic voltammetry. The characterization results show that LiMn2O4 exhibits a porous and hollow structure, which improves the utilization of the active mass area, and allows the dual conduction of Li+ and electrons, which effectively relieves the structural strain and volume change The cyclic voltammetry results record that LiMn2O4 and nanofibers of LiMn2O4 as a cathode material enhanced the cycling performance and possess excellent stability. Further, the conductivity of each sample was measured using the DC four-probe method, and the highest conductivity was observed for the LiMn2O4 nanofibers 1.43 SCm-1 at 650 degrees C.