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Titolo:
Effects of stacking fault defects on the X-ray diffraction patterns of T2,O2, and O6 structure Li-2/3[CoxNi1/3-xMn2/3]O-2
Autore:
Lu, ZH; Dahn, JR;
Indirizzi:
Dalhousie Univ, Dept Phys, Halifax, NS B3H 3J5, Canada Dalhousie Univ Halifax NS Canada B3H 3J5 hys, Halifax, NS B3H 3J5, Canada Dalhousie Univ, Dept Chem, Halifax, NS B3H 3J5, Canada Dalhousie Univ Halifax NS Canada B3H 3J5 hem, Halifax, NS B3H 3J5, Canada
Titolo Testata:
CHEMISTRY OF MATERIALS
fascicolo: 6, volume: 13, anno: 2001,
pagine: 2078 - 2083
SICI:
0897-4756(200106)13:6<2078:EOSFDO>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
RECHARGEABLE LITHIUM BATTERIES; LAYERED CATHODE MATERIAL; LI; LI-2/3O-2; EXCHANGE; VARIETY; BRONZES; NI; MN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Dahn, JR Dalhousie Univ, Dept Phys, Halifax, NS B3H 3J5, Canada Dalhousie Univ Halifax NS Canada B3H 3J5 fax, NS B3H 3J5, Canada
Citazione:
Z.H. Lu e J.R. Dahn, "Effects of stacking fault defects on the X-ray diffraction patterns of T2,O2, and O6 structure Li-2/3[CoxNi1/3-xMn2/3]O-2", CHEM MATER, 13(6), 2001, pp. 2078-2083

Abstract

During the preparation of Li-2/3[CoxNi1/3-xMn2/3]O-2 from Na-2/3[CoxNi1/3-xMn2/3]O-2 by low-temperature ion exchange, the MO2 sheets slide so the alkali coordination can change from prismatic in the Na compound to octahedralor tetrahedral in the Li compound. All Li-containing samples show stackingfaults, some with very high densities of faults, based on broad mixed index peaks in their diffraction patterns. Here, we calculate simulated diffraction patterns using the DIFFaX program developed by Treacy ct al. We have considered intergrowths of the T2 and O2 structures and stacking faults in both O2 and O6 structures and have compared the results with experimental X-ray diffraction patterns of Li-2/3[CoxNi1/3-xMn2/3]O-2 (x = 0, (1)/(24), and (1)/(12)). The stacking fault models are consistent with the experimentaldata. Furthermore, we suggest that Li-2/3[CoxNi1/3-xMn2/3]O-2 (x = 1/12) is actually a stacking faulted O6 structure, not a stacking faulted O2 structure as we claimed previously.

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Documento generato il 29/09/20 alle ore 00:05:41