Solid State Electrochemistry and Battery Application of Coordination Compounds

Abstract

Battery technology is a key to realize a sustainable society. The currently-used lithium-ion batteries, which were commercialized in 1991 by SONY, have high gravimetric/volumetric energy densities to power almost all the portable electronics. However, largescale applications such as electric vehicles or a power grid require development of better batteries, especially in terms of energy densities, power densities, cycle life, cost, and elemental strategy. Because the poor performance of the electrode materials is one of the main obstacles to the high-performance batteries, it is essential to discover novel electrode materials for advanced batteries. Herein, recent efforts devoted to application of coordination compounds to the battery electrodes are briefly summarized. In particular, the solid-state electrochemistry of cyano-bridged coordination compounds including Prussian blue analogs are focused.