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Titolo:
Lithium nickelate electrodes with enhanced high-temperature performance and thermal stability
Autore:
Arai, H; Tsuda, M; Sakurai, Y;
Indirizzi:
NTT, Telecommun Energy Labs, Ibaraki, Osaka 3191193, Japan NTT Ibaraki Osaka Japan 3191193 nergy Labs, Ibaraki, Osaka 3191193, Japan
Titolo Testata:
JOURNAL OF POWER SOURCES
fascicolo: 1, volume: 90, anno: 2000,
pagine: 76 - 81
SICI:
0378-7753(200009)90:1<76:LNEWEH>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLID-SOLUTION; ION BATTERIES; LINIO2; CATHODE; CELLS; ELECTROCHEMISTRY; SAFETY; R(3)OVER-BAR-M;
Keywords:
lithium nickelate; positive electrode material; lithium ion battery; substitution; high-temperature performance; thermal stability;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Arai, H NTT, Telecommun Energy Labs, Ibaraki, Osaka 3191193, Japan NTT Ibaraki Osaka Japan 3191193 bs, Ibaraki, Osaka 3191193, Japan
Citazione:
H. Arai et al., "Lithium nickelate electrodes with enhanced high-temperature performance and thermal stability", J POWER SOU, 90(1), 2000, pp. 76-81

Abstract

Lithium nickelate is an attractive positive electrode material for lithiumion batteries because of its large capacity at ambient temperatures. However, highly delithiated LiNiO2 (e.g. Li0.2NiO2) shows undesirable exothermalheat at 200 degrees C. We found another issue of LiNiO2 in this study, namely poor reversibility at 40 degrees C. To overcome the-se disadvantages, we introduced cobalt, manganese, and titanium as partial substituents for nickel. Cobalt substitution was effective in improving the reversibility at 40 degrees C. The exothermal decomposition of the delithiated compounds was suppressed by using manganese and titanium as substituents. We found doublysubstituted nickelate LiNi0.8Co0.1Ti0.1O2 to be the most promising in terms of large capacity (190 mA h g(-1)), enhanced high-temperature performance, and improved thermal stability. (C) 2000 Elsevier Science S.A. All rightsreserved.

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Documento generato il 02/10/20 alle ore 01:39:21