Structural and Na-ion conduction characteristics of Na3PSxSe4–x
Journal Article
·
· Journal of Materials Chemistry. A
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
The recent discovery of the isostructrual cubic Na3PS4 and Na3PSe4 as fast Na-ion conductors provided a general structural framework for the exploration of new sodium superionic conductors. In this work, we systematically investigated the structures and ionic conduction characteristics of a series of compounds with the general chemical formula of Na3PSxSe4–x. Synthesis of Na3PS4 under different conditions (e.g., temperature, reaction vessel, mass of the precursors) reveals the reactivity of the precursors with the reaction tubes, producing different polymorphs. X-ray diffraction studies on the solid solution phases Na3PSxSe4–x identified a tetragonal-to-cubic phase transition with increasing Se concentration. This observation is consistent with the computed stability of the tetragonal and cubic polymorphs, where the energy difference between the two polymorphs becomes very close to zero in Se-rich compositions. Furthermore, ab initio molecular dynamic simulations suggest that the fast Na-ion conduction in Na3PSxSe4–x may not be causally related with the symmetry or the composition of these phases. The formation of defects, instead, enables fast Na-ion conduction in this class of materials.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1393007
- Alternate ID(s):
- OSTI ID: 1324782
- Journal Information:
- Journal of Materials Chemistry. A, Journal Name: Journal of Materials Chemistry. A Journal Issue: 23 Vol. 4; ISSN JMCAET; ISSN 2050-7488
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structural and Na-ion conduction characteristics of Na 3 PS x Se 4-x
Sodium superionic conduction in tetragonal Na{sub 3}PS{sub 4}
Insights into the Rich Polymorphism of the Na+ Ion Conductor Na3PS4 from the Perspective of Variable-Temperature Diffraction and Spectroscopy
Journal Article
·
Thu May 19 00:00:00 EDT 2016
· Journal of Materials Chemistry. A
·
OSTI ID:1324782
Sodium superionic conduction in tetragonal Na{sub 3}PS{sub 4}
Journal Article
·
Sat Sep 15 00:00:00 EDT 2018
· Journal of Solid State Chemistry (Print)
·
OSTI ID:22890218
Insights into the Rich Polymorphism of the Na+ Ion Conductor Na3PS4 from the Perspective of Variable-Temperature Diffraction and Spectroscopy
Journal Article
·
Thu Jul 15 20:00:00 EDT 2021
· Chemistry of Materials
·
OSTI ID:1833596