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Titolo:
Divalent cation incorporated Li(1+x)MMgxO2(1+x) (M = Ni0.75Co0.25): viablecathode materials for rechargeable lithium-ion batteries
Autore:
Chang, CC; Kim, JY; Kumta, PN;
Indirizzi:
Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA Carnegie Mellon Univ Pittsburgh PA USA 15213 gn, Pittsburgh, PA 15213 USA
Titolo Testata:
JOURNAL OF POWER SOURCES
fascicolo: 1, volume: 89, anno: 2000,
pagine: 56 - 63
SICI:
0378-7753(200007)89:1<56:DCIL(=>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
LINIO2; LICOO2; CELLS; PERFORMANCE; ELECTRODE; OXIDES;
Keywords:
lithium-ion battery; cathode material; Mg-doped lithium nickel cobalt oxide; high voltage durability;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Kumta, PN Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA Carnegie Mellon Univ Pittsburgh PA USA 15213 urgh, PA 15213 USA
Citazione:
C.C. Chang et al., "Divalent cation incorporated Li(1+x)MMgxO2(1+x) (M = Ni0.75Co0.25): viablecathode materials for rechargeable lithium-ion batteries", J POWER SOU, 89(1), 2000, pp. 56-63

Abstract

A new class of divalent cation incorporated materials, Li1+xNi0.75Co0.25MgxO2(1+x), corresponding to Li(Ni0.75Co0.25)(1-y)MgyO2 (y = x/(1 + x)), havebeen successfully synthesized and electrochemically characterized. Good cyclability, high voltage durability (up to 4.4 V during charging) and high capacity (> 150 mA h/g) are the main characteristics of this class of materials. The successful introduction of the divalent cations alone on the transition metal sites helps to attain these characteristics while also maintaining a large nominal capacity of the material without the interference of the aliovalent cations on the Li sites. Good cycling behavior at high voltages is probably due to the prevention of overcharging of the material caused by the overoxidation of the transition metal as well as the presence of divalent cations on the transition metal site. The presence of the overoxidized transition metal as well as divalent cations on the transition metal sitenot only increases the cycling voltage but also enhances the phase stability of the materials during cycling. (C) 2000 Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 19:35:07