Please use this identifier to cite or link to this item:
|Title:||Variation in structure and Li +-ion migration in argyrodite-type Li 6PS 5X (X = Cl, Br, I) solid electrolytes||Authors:||Rayavarapu, P.R.
Lithium ion conduction
|Issue Date:||May-2012||Citation:||Rayavarapu, P.R., Sharma, N., Peterson, V.K., Adams, S. (2012-05). Variation in structure and Li +-ion migration in argyrodite-type Li 6PS 5X (X = Cl, Br, I) solid electrolytes. Journal of Solid State Electrochemistry 16 (5) : 1807-1813. ScholarBank@NUS Repository. https://doi.org/10.1007/s10008-011-1572-8||Abstract:||All-solid-state rechargeable lithium-ion batteries (AS-LIBs) are attractive power sources for electrochemical applications due to their potentiality in improving safety and stability over conventional batteries with liquid electrolytes. Finding a solid electrolyte with high ionic conductivity and compatibility with other battery components is a key factor in raising the performance of AS-LIBs. In this work, we prepare argyrodite-type Li 6PS 5X (X = Cl, Br, I) using mechanical milling followed by annealing. X-ray diffraction characterization reveals the formation and growth of crystalline Li 6PS 5X in all cases. Ionic conductivity of the order of 7×10 -4 S cm -1 in Li 6PS 5Cl and Li 6PS 5Br renders these phases suitable for AS-LIBs. Joint structure refinements using high-resolution neutron and laboratory X-ray diffraction provide insight into the influence of disorder on the fast ionic conductivity. Besides the disorder in the lithium distribution, it is the disorder in the S 2-/Cl - or S 2-/ Br - distribution that we find to promote ion mobility, whereas the large I- cannot be exchanged for S 2- and the resulting more ordered Li 6PS 5I exhibits only a moderate conductivity. Li + ion migration pathways in the crystalline compounds are modelled using the bond valence approach to interpret the differences between argyrodites containing different halide ions.||Source Title:||Journal of Solid State Electrochemistry||URI:||http://scholarbank.nus.edu.sg/handle/10635/86974||ISSN:||14328488||DOI:||10.1007/s10008-011-1572-8|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Aug 16, 2019
WEB OF SCIENCETM
checked on Aug 9, 2019
checked on Aug 17, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.