LiCoyNi(1-y)VO(4) componnds ( y = 0, 0.2, 0.5, 0.8, 1) have been prepared for lithium-ion cell cathode applications by different chemical routes. The polycrystalline materials were characterized by X-ray powder diffraction (XRPD) and by solid state (7)Li and (51)V nuclear magnetic resonance (NMR) analysis. The results shaw an increase of the lattice parameter with increasing Co content and a varying distribution of Co, Ni, and V in the crystallographic sites. Moreover, both XRPD and NMR data reveal different degrees of crystallinity depending on the preparation method. The first electrochemical tests show that the distribution of ions in the various crystallographic sites and the crystallinity degree are correlated to the electrochemical performances. (C) 2001 Elsevier Science B.V, All rights reserved.
Correlation between structural and electrochemical properties of Li metal vanadates / Panero, Stefania; M., Arrabito; S., Bodoardo; N., Penazzi; Reale, Priscilla; Scrosati, Bruno; Y., Wang; X., Guo; S. G., Greenbaum. - In: JOURNAL OF POWER SOURCES. - ISSN 0378-7753. - 97-8:(2001), pp. 478-481. (Intervento presentato al convegno 10th International Meeting on Lithium Batteries tenutosi a COMO, ITALY nel MAY 28-JUN 02, 2000) [10.1016/s0378-7753(01)00632-2].
Correlation between structural and electrochemical properties of Li metal vanadates
PANERO, Stefania;REALE, Priscilla;SCROSATI, Bruno;
2001
Abstract
LiCoyNi(1-y)VO(4) componnds ( y = 0, 0.2, 0.5, 0.8, 1) have been prepared for lithium-ion cell cathode applications by different chemical routes. The polycrystalline materials were characterized by X-ray powder diffraction (XRPD) and by solid state (7)Li and (51)V nuclear magnetic resonance (NMR) analysis. The results shaw an increase of the lattice parameter with increasing Co content and a varying distribution of Co, Ni, and V in the crystallographic sites. Moreover, both XRPD and NMR data reveal different degrees of crystallinity depending on the preparation method. The first electrochemical tests show that the distribution of ions in the various crystallographic sites and the crystallinity degree are correlated to the electrochemical performances. (C) 2001 Elsevier Science B.V, All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
