Solid state ionics, ionic conductors, energy storage, sensors, ion adsorbents
Ionics in coordination compounds is a fundamental issue of coordination chemistry that governs a range of properties/phenomena including ion adsorption, ion conduction, mixed conduction, and solid-state redox reaction. Its technological importance is highlighted especially when considering the close relevance to potential applications in the fields of energy storage, energy conversion, energy harvesting, and environment. For example, high-performance electrochemical energy storage devices such as batteries and supercapacitors are required for the efficient utilization of renewable energy, where an elemental process is a solid-state redox reaction associated with diffusion of both electrons and ions in the electrode materials. Prussian blue analogues, polyoxometalates, and metal organic frameworks (MOFs) can efficiently operate as electrode materials in batteries and supercapacitors. Ionic conduction in coordination compounds is another important aspect because of its potential application to the solid electrolyte in the fuel cells or batteries. Various MOFs have been tailored to exhibit a high ionic conductivity. Ion adsorption in coordination compounds, which is applicable to desalination, sensing and metal harvesting, is also an important topic. By designing the porous space of coordination compounds, an ion adsorption capacity can be enhanced significantly, owing to the improved selectivity and accessibility of the ions. Furthermore, modulation of various physical properties (magnetism, electronic conductivity, fluorescence and so on.) of coordination compounds by exploiting the dynamics of ions is also fascinating. However, despite their scientific and technological importance, ionics in coordination compounds is yet to be fully understood. Therefore, this session aims to provide an opportunity to gather international and multidisciplinary leading scientists to discuss all the aspects of ionics in coordination compounds for energy, environment, and advanced applications. We strongly believe that this session will allow us to take a big picture look at where the field has been and where it is going.