Structure, ionic conductivity and electrochemical stability of Li2S–P2S5–LiI glass and glass–ceramic electrolytes
The structures, ionic conductivities and electrochemical stabilities of the (100−x)(0.7Li2S·0.3P2S5)·xLiI glass and glass–ceramic electrolytes were investigated. The (100−x)(0.7Li2S·0.3P2S5)·xLiI glasses and glass–ceramics were prepared by mechanical milling in the composition range 0≤x(mol%)≤20. Al...
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Published in | Solid state ionics Vol. 211; pp. 42 - 45 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
15.03.2012
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Subjects | |
Online Access | Get full text |
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Summary: | The structures, ionic conductivities and electrochemical stabilities of the (100−x)(0.7Li2S·0.3P2S5)·xLiI glass and glass–ceramic electrolytes were investigated. The (100−x)(0.7Li2S·0.3P2S5)·xLiI glasses and glass–ceramics were prepared by mechanical milling in the composition range 0≤x(mol%)≤20. All the glasses and glass–ceramics had P2S74− and PS43− ions. The Li7P3S11 crystals were observed in all the glass–ceramics. On the other hand, crystals containing PS43− ions were mainly precipitated in the glass–ceramics with increasing the LiI content. The conductivities of glasses increased with increasing the LiI content, and the glass at x=20 showed the highest conductivity of 5.6×10−4Scm−1. While the conductivity of glass–ceramics at x=0 was 4.2×10−3Scm−1, it decreased sharply with increasing the LiI content. Cyclic voltammetry indicated that the 80(0.7Li2S·0.3P2S5)·20LiI glasses exhibited a wide electrochemical stability up to 10V vs. Li+/Li.
► The (100−x)(0.7Li2S·0.3P2S5)·xLiI glass-based electrolytes were prepared. ► The conductivity of the glasses increased with increasing the LiI content. ► The glass–ceramics showed higher conductivity than the glasses at small LiI content. ► The glass with 20mol% LiI exhibited a wide electrochemical window of 10V. |
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ISSN: | 0167-2738 1872-7689 |
DOI: | 10.1016/j.ssi.2012.01.017 |