Effect of Li2SO4 on the properties of Li2S–P2S5 glass-ceramic solid electrolytes. Issue 6 (1st May 2016)

• Record Type: Journal Article
• Authors: Choi, Sunho; Eom, Minyong; Park, Chanhwi; Son, Seunghyeon; Lee, Giho; Shin, Dongwook
• Is Part Of: Ceramics international. Volume 42:Issue 6(2016)
• Page Start: 6738
• Page End: 6742
• Publication Date: 2016-05-01
• Subjects: All-solid-state lithium ion battery -- Solid electrolyte -- Thermal stability -- Sulfide -- Sulfate; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.01.045
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Glass-ceramic solid electrolytes of (100− x )(78Li2 S·22P2 S5 )· x Li2 SO4 ( x =0, 4, and 5) were prepared by high-energy mechanical milling and subsequent heat-treatment. The low thermal stability of the metastable thio-LISICON II analog phase of the 78Li2 S·22P2 S5 glass-ceramics was identified by gradual transformation to a thio-LISICON III analog phase over a narrow temperature range of heat treatment. However, the addition of 5 mol% Li2 SO4 into the 78Li2 S·22P2 S5 glass-ceramics suppressed the formation of the thio-LISICON III analog phase and enhanced the structural stability of the thio-LISICON II analog phase at higher heat treatment temperatures. From X-ray diffraction (XRD) and differential thermal analysis (DTA) results, the enhanced thermal stability of the thio-LISICON II analog phase in the Li2 SO4 added 78Li2 S·22P2 S5 glass-ceramics is closely related to the lithium content of the glass matrix and the incorporated tetrahedral S O 4 2 − anions in the crystal lattice of the thio-LISICON II analog phase.