Lithium ion conductivity of complex hydrides incorporating multiple closo-type complex anions

Abstract

We report the lithium ionic conductivities of closo-type complex hydrides synthesized from various molar ratios of lithium borohydride (LiBH4) and decaborane (B10H14) as starting materials. The prepared closo-type complex hydrides comprised [B12H12](2-), [B11H11](2-), and [B10H10](2-) complex anions. In addition, increasing the LiBH4 content in the starting materials increased the amounts of [B11H11](2-) and [B10H10](2-), leading to an improved ion conductivity of the prepared sample. The present study offers useful insights into strategies for controlling the complex anion composition in emerging solid electrolytes of closo-type complex hydrides at the molecular level, and improving their ionic conductivities. (C) 2019 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.