%0 Journal Article
%A Odenwald, Philipp
%A Ma, Qianli
%A Davaasuren, Bambar
%A Dashjav, Enkhtsetseg
%A Tietz, Frank
%A Wolff, Michael
%A Rheinheimer, Wolfgang
%A Uhlenbruck, Sven
%A Guillon, Olivier
%A Fattakhova-Rohlfing, Dina
%T The Impact of Lithium Tungstate on the Densification and Conductivity of Phosphate Lithium Ion Conductors
%J ChemElectroChem
%V 9
%N 5
%@ 2196-0216
%C Weinheim
%I Wiley-VCH
%M FZJ-2021-04351
%P e202101366
%D 2022
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000733391400001
%R 10.1002/celc.202101366
%U https://juser.fz-juelich.de/record/902550