Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
On the correlation between the electroanalytical behavior and crystallographic features of Li-intercalation electrodes
Autore:
Levi, MD; Levi, E; Aurbach, D; Schmidt, M; Oesten, R; Heider, U;
Indirizzi:
Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel Bar Ilan Univ Ramat Gan Israel IL-52900 Chem, IL-52900 Ramat Gan, Israel Merck KGAA, Darmstadt, Germany Merck KGAA Darmstadt GermanyMerck KGAA, Darmstadt, Germany
Titolo Testata:
JOURNAL OF POWER SOURCES
, volume: 97-8, anno: 2001,
pagine: 525 - 528
SICI:
0378-7753(200107)97-8:<525:OTCBTE>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Keywords:
lithium rechargeable batteries; LixNiO2 and LixCo0.2Ni0.8O2 electrodes; impedance spectroscopy; chemical diffusion coefficient of Li-ions;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
7
Recensione:
Indirizzi per estratti:
Indirizzo: Aurbach, D Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel Bar Ilan Univ Ramat Gan Israel IL-52900 900 Ramat Gan, Israel
Citazione:
M.D. Levi et al., "On the correlation between the electroanalytical behavior and crystallographic features of Li-intercalation electrodes", J POWER SOU, 97-8, 2001, pp. 525-528

Abstract

The electroanalytical behavior of LixNiO2 and LixCo0.2Ni0.8O2 was studied by simultaneous application of slow-scan rate cyclic voltammetry (SSCV), potentiostatic and galvanostatic intermittent titration (PITT and GITT), and electrochemical impedance spectroscopy (EIS). Application of a finite-spacediffusion model for treating the results obtained by these techniques allowed us to calculate the diffusion coefficient of Li ions (D) and the differential (incremental) capacity (C-int) as functions of the electrode's potential. Our final purpose was to compare D versus E and C-int versus E plots for both the electrodes, in order to correlate the observed difference in their electroanalytical behavior with the clear distinction in the related Li-insertion mechanisms deduced from XRD studies. While Li insertion into LixCo0.2Ni0.8O2 exhibits a single-phase reaction upon charge in the 3.0-4.08 V (versus Li/Li+) range, Li intercalation into LixNiO2 undergoes two-phase transitions in the same potential range. The shape of both plots, D versus E and C-int versus E for these electrodes, is discussed in the framework ofa finite-space diffusion model and Li-insertion processes that can be described by Frtmkin-type intercalation isotherms with shea-range attraction interactions among intercalation sites. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 01:27:27