Jump to main content
Jump to site search

Issue 26, 2017
Previous Article Next Article

Superhalogen-based lithium superionic conductors

Author affiliations


The development of cheap, durable, and safe inorganic solid electrolytes with superionic conductivity is the key for the next generation of all-solid metal-ion batteries. The recent discovery of antiperovskites with composition Li3OA (A = halogen) shows promise in this regard. Here, we demonstrate the potential of a new class of antiperovskites where halogens are replaced by BH4 superhalogens. In addition to maintaining the high ionic conductivity of Li3OA, Li3O(BH4) is lightweight, mechanically flexible, thermodynamically more stable, and electronically more insulating than Li3OA. By mixing BH4 with Cl to make Li3O(BH4)0.5Cl0.5, we further show that the conductivity will be doubled. The Li+-ion conductivity of the new materials is of the order of 10−4 to over 10−3 S cm−1 at room temperature and will be well above 10−2 S cm−1 at higher temperatures below the melting point. The conduction mechanism of the material is revealed by identifying the relationship between the orientational symmetry of the BH4 rotors and the potential surface felt by the lithium ions.

Graphical abstract: Superhalogen-based lithium superionic conductors

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Feb 2017, accepted on 06 Apr 2017 and first published on 06 Apr 2017

Article type: Paper
DOI: 10.1039/C7TA01648D
Citation: J. Mater. Chem. A, 2017,5, 13373-13381
  •   Request permissions

    Superhalogen-based lithium superionic conductors

    H. Fang, S. Wang, J. Liu, Q. Sun and P. Jena, J. Mater. Chem. A, 2017, 5, 13373
    DOI: 10.1039/C7TA01648D

Search articles by author