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A quaternary sodium superionic conductor - Na10.8Sn1.9PS11.8

Journal Article · · Nano Energy
Sulfide-based Na-ion conductors are promising candidates as solid-state electrolytes (SSEs) for fabrication of solid-state Na-ion batteries (NIBs) because of their high ionic conductivities and low grain boundary resistance. Currently, most of the sulfide-based Na-ion conductors with high conductivities are focused on Na3PS4 phases and its derivatives. It is desirable to develop Na-ion conductors with new composition and crystal structure to achieve superior ionic conductivities. Here we report a new quaternary Na-ion conductor, Na10.8Sn1.9PS11.8, exhibiting a high ionic conductivity of 0.67mS cm-1 at 25 °C. This high ionic conductivity originates from the presence of a large number of intrinsic Na-vacancies and three-dimensional Na-ion conduction pathways, which has been confirmed by single-crystal X-ray diffraction and first-principles calculations. The Na10.8Sn1.9PS11.8 phase is further evaluated as an electrolyte in a Na-Sn alloy/TiS2 battery, demonstrating its potential application in all-solid-state NIBs.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1490320
Report Number(s):
PNNL-SA-136565
Journal Information:
Nano Energy, Journal Name: Nano Energy Journal Issue: C Vol. 47; ISSN 2211-2855
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

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LaLiO 2 -Based Multi-Functional Interlayer for Enhanced Performance of Li-S Batteries journal January 2019
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Salt-Based Organic-Inorganic Nanocomposites: Towards A Stable Lithium Metal/Li 10 GeP 2 S 12 Solid Electrolyte Interface journal September 2018
Mechanochemical synthesis of fast sodium ion conductor Na 11 Sn 2 PSe 12 enables first sodium–selenium all-solid-state battery journal January 2019
Electrolytes and Electrolyte/Electrode Interfaces in Sodium‐Ion Batteries: From Scientific Research to Practical Application journal March 2019
Recent Research on Strategies to Improve Ion Conduction in Alkali Metal‐Ion Batteries journal April 2019
Salt-Based Organic-Inorganic Nanocomposites: Towards A Stable Lithium Metal/Li 10 GeP 2 S 12 Solid Electrolyte Interface journal September 2018
Na 1.5 La 1.5 TeO 6 : Na + conduction in a novel Na-rich double perovskite journal January 2018
A sodium-ion sulfide solid electrolyte with unprecedented conductivity at room temperature journal November 2019


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