Liquid-Like Ionic Conduction in Solid Lithium and Sodium Monocarba-closo-Decaborates Near or at Room Temperature

Wan Si Tang, Motoaki Matsuo, Hui Wu, Vitalie Stavila, Wei Zhou, Albert Alec Talin, Alexei V. Soloninin, Roman V. Skoryunov, Olga A. Babanova, Alexander V. Skripov, Atsushi Unemoto, Shin Ichi Orimo, Terrence J. Udovic

Research output: Contribution to journalArticlepeer-review

164 Citations (Scopus)


The search for solid electrolytes with sufficiently high ionic conductivities and stabilities is underway to enable the commercial viability of all-solid-state rechargeable batteries. LiCB9H10 and NaCB9H10 compounds exhibit the most impressive superionic conductivities yet among complex-hydride-based materials, including this class of large-polyhedral-anion-based salts. The pseudoaromatic nature of the CB9H10 anions makes them relatively stable like their B12H122-, B10H102-, and CB11H122- cousins, rendering their salts prime candidates for incorporation into next-generation, all-solid-state devices. Preliminary cyclic voltammetry measurements indicate that only cathodic and anodic currents are observed near 0 v corresponding to Li/Na deposition on the Au electrode and Li/Na stripping, respectively, without signifi cant anodic currents, at least ≤ 5 v for both LiCB9H10 (363 K) and NaCB9H10 (303 K). The similar conductivity behaviors with temperature for LiCB9H10 and NaCB9H10 compared to those for LiCB11H12 and NaCB11H12 , and their order-of-magnitude enhancements over disordered NaCB9H10, irrespective of structural symmetries, further reinforces the notion that anion monovalency better facilitates high cation translational mobility in these large- polyhedral-anion-based systems.

Original languageEnglish
JournalAdvanced Energy Materials
Issue number8
Publication statusPublished - 2016 Apr 20
Externally publishedYes


  • lithium conductors
  • monocarba-closo-decaborates
  • sodium conductors
  • solid-state electrolytes
  • superionic conductivity

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)


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