In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 27 ( 2022), p. 14392-14398
Abstract:
The Li 10 GeP 2 S 12 -type phase in the Li–Si–P–S–Cl system (LSiPSCl) shows the highest lithium ionic conductivity among the Li ion conductors reported to date. With the aim of establishing a large-scale production process for LSiPSCl, we report the development of a liquid-phase approach to its synthesis. The ionic conductivity and particle morphology are characterised, and their effects on the electrochemical properties of the LSiPSCl phase synthesised by the new liquid-phase method (L-LSiPSCl) are investigated. An L-LSiPSCl phase with an ionic conductivity of 6.6 mS cm −1 at 298 K is obtained by adjusting the sulfur ratio in the dissolved starting materials. Compared with the LSiPSCl phase synthesised via the conventional solid-state approach (S-LSiPSCl), L-LSiPSCl shows an increased grain-boundary resistivity and its particles consisted of small porous grains. An all-solid-state cell prepared using L-LSiPSCl as the solid electrolyte exhibits stable cycling, with a discharge capacity retention of 〉 97% after 100 cycles; this is a comparable performance to that of the S-LSiPSCl-based reference cell, indicating that L-LSiPSCl functions stably as a solid electrolyte in all-solid-state batteries. Finally, this study suggests that liquid-phase synthesis is a promising approach for the large-scale production of sulfides that exhibit high ionic conductivities, such as LSiPSCl.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
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