Fabrication and Electrochemical Properties of Hemisphere Structured 3D Li(Li0.2Mn0.54Co0.13Ni0.13)O-2 Cathode Thin Film for All-Solid-State Lithium Battery

Abstract

The Li[Li0.2Mn0.54Ni0.13Co0.13]O-2 cathode thin films were deposited on planar, hemisphere, linked hemisphere, and isolated hemisphere structured Pt current collector thin films to investigate the effect of 3-dimensional (3-D) structure for the electrochemical properties of active cathode thin films. The films of linked hemisphere structure shows the highest initial discharge capacity of 140 mu A h/cm(2)-mu m which is better than those of planar (62 mu A h/cm(2)-mu m), hemisphere (94.6 mu A h/cm(2)-mu m), and isolated hemisphere (135 mu A h/cm(2)-mu m) films due to increase of surface area for cathode thin films. Linked hemisphere shows the biggest capacity and the best retention rate because 6 nanobridges of each hemisphere bring strong connection.