Stabilization Of Lithium Superionic Conduction Phase And Enhancement Of Conductivity Of Libh_4 By Lici Addition

摘要

LiBH_4 exhibits lithium superionic conduction accompanied by structural transition at around 390 K. Addition of LiCl to LiBH_4 drastically affects both the transition and electrical conductivity: Transition from low-temperature (LT) to high-temperature (HT) phases in LiBH_4 is observed at 370 K upon heating and the HT phase can be retained at 350-330 K upon cooling. Further, the conductivity in the LT phase is more than one or two orders of magnitude higher than that of pure LiBH_4. These properties could be attributed to the dissolution of LiCl into LiBH_4, suggested by in situ x-ray diffraction measurement.