Synthesis and Electrochemical Property of Layer-by-Layer Deposition Structure with Epitaxial Li-Mn oxide and Li-Co oxide

摘要

Lithium batteries have played a significant role in the devices as power supply systems of electric vehicles, smart grid and a large scale power storage system [1]. However, novel power storage systems require new battery materials with high current and energy densities. Although many compounds have been studied as electrode materials with the layered rock-salt LiMO_22 (M: transition metals), LiM_2O_4 spinel, and LiMPO_4 olivine type structures [2], new synthetic strategy is still necessary for the further developments of the materials applicable to the electrodes. In this study, a new synthetic method using a multi-layer formation technique was examined for the electrode materials of lithium battery. The spinel phase of LiMn_2O_4 (LMO) and the layered rock-salt phase of LiCoO_2 (LCO) were deposited as an epitaxial thin film with a multi-layer construction. The structure and the electrochemical properties of these epitaxial films were examined.