This title appears in the Scientific Report :
2022
Please use the identifier:
http://hdl.handle.net/2128/30812 in citations.
Please use the identifier: http://dx.doi.org/10.1002/celc.202101366 in citations.
The Impact of Lithium Tungstate on the Densification and Conductivity of Phosphate Lithium Ion Conductors
The Impact of Lithium Tungstate on the Densification and Conductivity of Phosphate Lithium Ion Conductors
Phosphate lithium ion conductors are outstanding electrolyte materials for solid-state lithium batteries. As polycrystalline ceramics, they have to be sintered at high temperatures. Lithium tungstate Li 2 WO 4 (LWO) is reported for the first time as an effective sintering aid to reduce the sintering...
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Personal Name(s): | Odenwald, Philipp |
---|---|
Ma, Qianli / Davaasuren, Bambar / Dashjav, Enkhtsetseg / Tietz, Frank / Wolff, Michael / Rheinheimer, Wolfgang / Uhlenbruck, Sven / Guillon, Olivier / Fattakhova-Rohlfing, Dina (Corresponding author) | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 |
Published in: | ChemElectroChem, 9 (2022) 5, S. e202101366 |
Imprint: |
Weinheim
Wiley-VCH
2022
|
DOI: |
10.1002/celc.202101366 |
Document Type: |
Journal Article |
Research Program: |
FestBatt-Oxide - Materialplattform 'Oxide' im Rahmen des Kompetenzclusters für Festkörperbatterien Components and Cells Fundamentals and Materials |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1002/celc.202101366 in citations.
Phosphate lithium ion conductors are outstanding electrolyte materials for solid-state lithium batteries. As polycrystalline ceramics, they have to be sintered at high temperatures. Lithium tungstate Li 2 WO 4 (LWO) is reported for the first time as an effective sintering aid to reduce the sintering temperature for one of the most common solid-state lithium ion conductors, Li 1.5 Al 0.5 Ti 1.5 (PO 4 ) 3 (LATP). While densification of LATP without sintering aids requires temperatures of at least 950°C to obtain a relative density of 90%, here relative densities of 90-95% are achieved even at 775°C when 5 wt.% of LWO is added. At 800°C the LATP containing 5 - 7 wt.% LWO densifies to a relative density of 97.2%. The ionic conductivity of LWO containing LATP is generally higher than that of pure LATP sintered at the same temperature. LATP containing 7 wt.% LWO shows high ionic conductivity of 4.4 × 10 -4 S/cm after sintering at 825°C. A significant reduction in sintering temperature, an increase in density and in the ionic conductivity of LATP as well as its non toxicity render LWO a very promising sintering aid for the development of LATP-based solid state batteries. |