%0 Journal Article
%A Lu, Xin
%A Camara, Osmane
%A Liu, Zigeng
%A Windmüller, Anna
%A Tsai, Chih-Long
%A Tempel, Hermann
%A Yu, Shicheng
%A Kungl, Hans
%A Eichel, Rüdiger-A.
%T Tuning the moisture stability of multiphase β‐Li 3 PS 4 solid electrolyte materials
%J Electrochemical science advances
%V 3
%N 2
%@ 2698-5977
%C Weinheim
%I Wiley-VCH Verlag GmbH & Co KGaA
%M FZJ-2022-01334
%P e2100208
%D 2022
%X Efficiently improving the moisture stability of β-Li3PS4 materials could significantly reduce production costs and eventually enable the mass application. Nanoporous multiphase β-Li3PS4 materials prepared via solvent-assistant routes usually contain solvent or solvent decomposition segments associated with the amorphous Li3PS4 phase in their structures. Herein, the solvent ethyl propionate (EP) remains in the β-Li3PS4 even after 220 h of annealing at 220°C. The possibility of tuning the moisture stability of β-Li3PS4 by adjusting the content of the solvent is investigated by environmental scanning electron microscopy (ESEM) combined with other structural analysis techniques. The results demonstrated that the hydrogen-containing amorphous Li3PS4 not only stabilizes the β-phase at room temperature but also improves the moisture stability of the material. Although the rapid hydrolysis occurs on the surface of solvent-containing β-Li3PS4 materials under ambient conditions within 10 s, with 4 wt% EP content, the material can be exposed to 1.6% relative humidity (R.H.) for at least 8 h without any structural or microstructural change. Even with the lower amount of EP (1.2 wt%) in the Li3PS4 structure, the material can withstand 1% R.H. for more than 8 h, which allows the material to be manufactured in a dry room. Our observation proposes a simple method to slightly modify the moisture stability of β-Li3PS4 to match the different manufacturing conditions.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001138657200013
%R 10.1002/elsa.202100208
%U https://juser.fz-juelich.de/record/906268