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Thio-oxynitride phosphate glass electrolytes prepared by mechanical milling

AuthorsMascaraque, Nerea; García Fierro, José Luis ; Muñoz, Francisco ; Durán, Alicia ; Ito, Yusuke; Hibi, Yoshiaki; Harada, Ryo; Kato, Atsutaka; Hayashi, Akitoshi; Tatsumisago, Masahiro
Issue Date14-Oct-2015
PublisherCambridge University Press
CitationJournal of Materials Research 30(19): 2940-2948 (2015)
AbstractLithium thio-phosphorus oxynitride glasses, LiPOSN, have been prepared by mechanical milling process from the mixture of Li2S and LiPON glass. The anionic substitution of oxygen by sulphur and nitrogen in the phosphate glass structure has been confirmed by 1D 31P solid state nuclear magnetic resonance and x-ray photoelectron spectroscopy. The study of thermal and electrical properties reveals a decrease in the glass transition temperature, likely due to the depolymerization of glass network by the decrease of bridging oxygens and sulphurs, along with a sharp increase in the ionic conductivity when lithium sulphide is incorporated into the oxynitride glasses. The improvement of chemical durability by the introduction of nitrogen, together with the increase in ionic conductivity up to values closed to the value of commercial LiPON thin film electrolyte, suggests that these LiPOSN glasses could be good candidates as solid electrolytes for lithium microbatteries.
Publisher version (URL)https://doi.org/10.1557/jmr.2015.128
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