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Titolo:
Lithium nickel oxyfluoride (Li1-zNi1+zFyO2-y) and lithium magnesium nickeloxide (Li1-z(MgxNi1-x)(1+z) O-2) cathodes for lithium rechargeable batteries Part I. Synthesis and characterization of bulk phases
Autore:
Naghash, AR; Lee, JY;
Indirizzi:
Natl Univ Singapore, Dept Chem & Environm Engn, Singapore 119260, Singapore Natl Univ Singapore Singapore Singapore 119260 ngapore 119260, Singapore
Titolo Testata:
ELECTROCHIMICA ACTA
fascicolo: 7, volume: 46, anno: 2001,
pagine: 941 - 951
SICI:
0013-4686(20010115)46:7<941:LNO(AL>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTROCHEMICAL PROPERTIES; ELECTRODE MATERIALS; SOLID-SOLUTION; LINIO2;
Keywords:
lithium nickel oxide; anion substitution; cation substitution; fluorine and magnesium; lithium-ion battery;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Lee, JY Natl Univ Singapore, Dept Chem & Environm Engn, 10 Kent Ridge Crescent, Singapore 119260, Singapore Natl Univ Singapore 10 Kent Ridge Crescent Singapore Singapore 119260
Citazione:
A.R. Naghash e J.Y. Lee, "Lithium nickel oxyfluoride (Li1-zNi1+zFyO2-y) and lithium magnesium nickeloxide (Li1-z(MgxNi1-x)(1+z) O-2) cathodes for lithium rechargeable batteries Part I. Synthesis and characterization of bulk phases", ELECTR ACT, 46(7), 2001, pp. 941-951

Abstract

Li1 - zNi1 + zFyO2 - y (0 less than or equal to y less than or equal to 0.2) and Li1 - z(MgxNi1 - x)(1 + z)O-2 {0 < x <less than or equal to> 0.15} were synthesized by partially substituting oxide anions with F- and Ni cations with Mg2+, respectively. The heavily fluoridated samples showed a high degree of cation disorder resulting from the increase in Ni2+ nickel ions atthe Li sites. The linear dependence of Lon the c(h)/a(h) ratio (based on Rougier's work Rougier, Gravereau, Delmas, J. Electrochem. Sec. 143 (1996) 1168) was used to estimate the extent of cation disorder in the layered structure. For lithium magnesium nickel oxides, the substitution has resulted in some oxygen non-stoichiometry. A simple argument based on the;values suggests increasing presence of Mg2+ cations in the Li layer at high degress ofMg substitution. Elemental analysis confirmed the increase in lithium deficiencies with increasing amounts of substituents in the layered structure. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 00:45:18