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Batteries 2018, 4(3), 33; https://doi.org/10.3390/batteries4030033

Coefficients of Thermal Expansion of Al- and Y-Substituted NaSICON Solid Solution Na3+2xAlxYxZr2−2xSi2PO12

1
Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), 52425 Jülich, Germany
2
Helmholtz-Institute Münster, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
3
Jülich Aachen Research Alliance, JARA-Energy, 52425 Jülich, Germany
*
Author to whom correspondence should be addressed.
Received: 25 May 2018 / Revised: 2 July 2018 / Accepted: 5 July 2018 / Published: 16 July 2018
(This article belongs to the Special Issue Sodium-Ion Battery: Materials and Devices)
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Abstract

Because of an increasing interest in NaSICON materials as electrolyte materials in all-solid state sodium batteries, their thermal expansion was investigated in this study. The thermal expansion coefficient (CTE) of the Al and Y-substituted NaSICON compositions Na3+2xAlxYxZr2−2xSi2PO12 with 0 ≤ x ≤ 0.3 was obtained by dilatometry and compared to the CTE derived from the lattice parameters using high-temperature X-ray diffraction. The difference in CTE obtained from techniques, the influence of sodium content and central metal cation on CTE, as well as other observations such as phase changes are described and rationalized. View Full-Text
Keywords: thermal expansion coefficient; dilatometry; NASICON thermal expansion coefficient; dilatometry; NASICON
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Naqash, S.; Gerhards, M.-T.; Tietz, F.; Guillon, O. Coefficients of Thermal Expansion of Al- and Y-Substituted NaSICON Solid Solution Na3+2xAlxYxZr2−2xSi2PO12. Batteries 2018, 4, 33.

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