|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||High Temperature Electrochemistry III
||Electrochemical Behavior of Sn/SnCl2 Cathode in Na | NaCl-AlCl3-SnCl2 | Sn Cell
||Takanari Ouchi, Raku Watari, Donald Sadoway
|On-Site Speaker (Planned)
A key area of research in molten salt batteries is to reduce the operating temperature. One molten salt system known to operate at low temperatures is the ZEBRA battery utilizing Na as the anode, Ni/NiCl2 as the cathode, and beta-alumina and molten NaCl-AlCl3 as the electrolyte. In this cell, the formation of solid NiCl2 upon charging inhibits the mass transport, hence limits the kinetics of charge/discharge processes and the utilization of active components. To address this issue, we investigated the validity of a liquid Sn/SnCl2 as the cathode. In this work, the diffusion coefficient of Sn ion and the exchange current density of Sn/Sn2+ redox reaction in a molten NaCl-AlCl3-SnCl2 electrolyte were evaluated. As a result, the liquid Sn/SnCl2 cathode is found to have suitably fast kinetics, which potentially enables a hypothetical Na | NaCl-AlCl3-SnCl2 | Sn cell with high power and energy densities at low operating temperature.
||Planned: Supplemental Proceedings volume