Na 3 V 2 (PO 4 ) 3 is one of the most important cathode materials for sodiumion batteries, delivering about two Na extraction/insertion from/into the unit structure. To understand the mechanism of sodium storage, a detailed structure of rhombohedral Na 3 V 2 (PO 4 ) 3 and its sodium extracted phase of NaV 2 (PO 4 ) 3 are investigated at the atomic scale using a variety of advanced techniques. It is found that two different Na sites (6b, M1 and 18e, M2) with different coordination environments co-exist in Na 3 V 2 (PO 4 ) 3 , whereas only one Na site (6b, M1) exists in NaV 2 (PO 4 ) 3 . When Na is extracted from Na 3 V 2 (PO 4 ) 3 to form NaV 2 (PO 4 ) 3 , Na + occupying the M2 site (CN = 8) is extracted and the rest of the Na remains at M1 site (CN = 6). In addition, the Na atoms are not randomly distributed, possibly with an ordered arrangement in M2 sites locally for Na 3 V 2 (PO 4 ) 3 . Na + ions at the M1 sites in Na 3 V 2 (PO 4 ) 3 tend to remain immobilized, suggesting a direct M2-to-M2 conduction pathway. Only Na occupying the M2 sites can be extracted, suggesting about two Na atoms able to be extracted from the Na 3 V 2 (PO 4 ) 3 structure
CITATION STYLE
Hidayat, N. (2017). Konsep Pendidikan Akhlak Bagi Peserta Didik Menurut Pemikiran Prof. Dr. Hamka. Solid State Ionics, 2(1), 1–10. Retrieved from http://linkinghub.elsevier.com/retrieve/pii/S0167273817305726%0Ahttp://dx.doi.org/10.1038/s41467-017-01772-1%0Ahttp://www.ing.unitn.it/~luttero/laboratoriomateriali/RietveldRefinements.pdf%0Ahttp://www.intechopen.com/books/spectroscopic-analyses-developme
Mendeley helps you to discover research relevant for your work.