Fabrication and electrochemical properties of LiMn2O4/SrRuO3 multi-layer epitaxial thin film electrodes

► Multi-layer LiMn2O4/SrRuO3 epitaxial film electrode was successfully fabricated. ► SrRuO3 as an electronic conducting buffer layer improved electrochemical property. ► No effects on the LiMn2O4 structure with the stacking of the buffer layer. ► Electrochemical property depends on an electronic contact of the substrate/electrode.