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Schilm J, Anton R, Wagner D, Huettl J, Kusnezoff M, Herrmann M, Kim HK, Lee CW. Influence of R=Y, Gd, Sm on Crystallization and Sodium Ion Conductivity of Na5RSi4O12 Phase. Materials 2022; 15:ma15031104. [PMID: 35161046 PMCID: PMC8838226 DOI: 10.3390/ma15031104] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/24/2022] [Accepted: 01/26/2022] [Indexed: 01/25/2023]
Abstract
New sodium-based battery concepts require solid electrolytes as ion conducting separators. Besides NaSICON and b-Al2O3 in the Na2O-R2O3-SiO2 system (R = rare earth), a rarely noticed glass-ceramic solid electrolyte with the composition Na5RSi4O12 (N5-type) exists. The present study addresses the investigation of the ionic conductivity of Na5RSi4O12 solid electrolytes sintered from pre-crystallized glass-ceramic powders. The sintering behavior (optical dilatometry), the microstructure (SEM/EDX), and phase composition (XRD), as well as electrochemical properties (impedance spectroscopy), were investigated. To evaluate the effect of the ionic radii, Y, Sm and Gd rare elements were chosen. All compositions were successfully synthesized to fully densified compacts having the corresponding conducting N5-type phase as the main component. The densification behavior was in agreement with the melting point, which decreased with increasing ionic radii and specific cell volume. Alternatively, the ionic conductivities of N5-phases decreased from Y to Gd and Sm containing samples. The highest ionic conductivity of 1.82·10−3 S cm−1 at 20 °C was obtained for Na5YSi4O12 composition. The impact of grain boundaries and bulk conductivity on measured values is discussed. A powder-based synthesis method of this glass-ceramic solid electrolyte using different rare earth elements opens possibilities for optimizing ionic conductivity and scalable technological processing by tape casting.
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Affiliation(s)
- Jochen Schilm
- Fraunhofer Institute for Ceramic Technology and Systems Fraunhofer IKTS, Winterbergstrasse 28, 01277 Dresden, Germany; (R.A.); (D.W.); (J.H.); (M.K.); (M.H.)
- Correspondence: (J.S.); (C.W.L.)
| | - Rafael Anton
- Fraunhofer Institute for Ceramic Technology and Systems Fraunhofer IKTS, Winterbergstrasse 28, 01277 Dresden, Germany; (R.A.); (D.W.); (J.H.); (M.K.); (M.H.)
| | - Dörte Wagner
- Fraunhofer Institute for Ceramic Technology and Systems Fraunhofer IKTS, Winterbergstrasse 28, 01277 Dresden, Germany; (R.A.); (D.W.); (J.H.); (M.K.); (M.H.)
| | - Juliane Huettl
- Fraunhofer Institute for Ceramic Technology and Systems Fraunhofer IKTS, Winterbergstrasse 28, 01277 Dresden, Germany; (R.A.); (D.W.); (J.H.); (M.K.); (M.H.)
| | - Mihails Kusnezoff
- Fraunhofer Institute for Ceramic Technology and Systems Fraunhofer IKTS, Winterbergstrasse 28, 01277 Dresden, Germany; (R.A.); (D.W.); (J.H.); (M.K.); (M.H.)
| | - Mathias Herrmann
- Fraunhofer Institute for Ceramic Technology and Systems Fraunhofer IKTS, Winterbergstrasse 28, 01277 Dresden, Germany; (R.A.); (D.W.); (J.H.); (M.K.); (M.H.)
| | - Hong Ki Kim
- Department of Chemical Engineering (Integrated Engineering) & Center for the SMART Energy Platform, College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung, Yongin 17104, Gyeonggi, Korea;
| | - Chang Woo Lee
- Department of Chemical Engineering (Integrated Engineering) & Center for the SMART Energy Platform, College of Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung, Yongin 17104, Gyeonggi, Korea;
- Correspondence: (J.S.); (C.W.L.)
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Thieme C, Dittmer M, Höche T, Rampf M, Rüssel C. Comparative study of the crystallization behavior within the Na 2O–Y 2O 3–ZrO 2–SiO 2 system during heating and cooling. CrystEngComm 2022. [DOI: 10.1039/d2ce00257d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Glasses from the system Na2O–Y2O3–SiO2 with different concentrations of ZrO2 were studied concerning phase formation and crystallization behavior.
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Affiliation(s)
- Christian Thieme
- Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Walter-Huelse-Str. 1, D-06120 Halle, Germany
| | - Marc Dittmer
- Ivoclar Vivadent AG, Bendererstr. 2, LI-9494 Schaan, Principality of Liechtenstein
| | - Thomas Höche
- Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Walter-Huelse-Str. 1, D-06120 Halle, Germany
| | - Markus Rampf
- Ivoclar Vivadent AG, Bendererstr. 2, LI-9494 Schaan, Principality of Liechtenstein
| | - Christian Rüssel
- Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Walter-Huelse-Str. 1, D-06120 Halle, Germany
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