Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume 2020, Issue 7, Pages 617-621Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201901083
Keywords
Sodium; Phosphidosilicates; Ion conductivity; Solid-state electrolytes; Structure elucidation
Categories
Funding
- University of Munich (LMU)
- Max Plank Society
- Center for NanoScience (CeNS)
- Deutsche Forschungsgemeinschaft (DFG)
- German Federal Ministry of Research and Education (BMBF) [03XP0177B]
- Cluster of Excellence e-conversion
Ask authors/readers for more resources
Ion conductors of light alkaline metals based on earth-abundant elements are important components for all-solid-state batteries. The new sodium-rich phosphidosilicate Na2SiP2 was synthesized by solid state reaction of stoichiometric amounts of the elements at 973 K and characterized by single-crystal X-ray diffraction (space group Pccn (no. 56), a = 12.7929(5) angstrom, b = 22.3109(9) angstrom, c = 6.0522(2) angstrom and Z = 16) and solid-state NMR under MAS conditions. The compound forms dark-red twinned crystals, and its crystal structure contains edge-sharing SiP4 tetrahedra connected to infinite (1)(infinity)[SiP4/2] chains. The sodium ions between the chains are fairly mobile. Electrochemical impedance spectroscopy shows a total ionic conductivity of sigma(Na+, 373 K) = 2.3 ? 10(-6) Scm(-1) with an activation energy of E-a = 0.43 eV, and the galvanostatic polarization reveals mixed conduction behavior with a transference number of 0.8.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available