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Titolo:
A causal study of the capacity fading of Li1.01Mn1.99O4 cathode at 80 degrees C, and the suppressing substances of its fading
Autore:
Yamane, H; Inoue, T; Fujita, M; Sano, M;
Indirizzi:
Nagoya Univ, Grad Sch Human Informat, Nagoya, Aichi 4648601, Japan Nagoya Univ Nagoya Aichi Japan 4648601 rmat, Nagoya, Aichi 4648601, Japan Nagoya City Univ, Inst Nat Sci, Nagoya, Aichi 4678501, Japan Nagoya City Univ Nagoya Aichi Japan 4678501 Nagoya, Aichi 4678501, Japan
Titolo Testata:
JOURNAL OF POWER SOURCES
fascicolo: 1-2, volume: 99, anno: 2001,
pagine: 60 - 65
SICI:
0378-7753(200109)99:1-2<60:ACSOTC>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
RECHARGEABLE LITHIUM BATTERIES; SPINEL INTERCALATION CATHODES; LI-ION BATTERIES; TEMPERATURE PERFORMANCE; MANGANESE-DIOXIDE; LIMN2O4; CELLS; INSERTION; SYSTEM; STABILIZATION;
Keywords:
discharge capacity; Li1.01Mn1.99O4 cathode; capacity fading;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Sano, M Nagoya Univ, Grad Sch Human Informat, Nagoya, Aichi 4648601, JapanNagoya Univ Nagoya Aichi Japan 4648601 goya, Aichi 4648601, Japan
Citazione:
H. Yamane et al., "A causal study of the capacity fading of Li1.01Mn1.99O4 cathode at 80 degrees C, and the suppressing substances of its fading", J POWER SOU, 99(1-2), 2001, pp. 60-65

Abstract

Discharge capacities of the Li1.01Mn1.99O4 cathode and Mn content dissolved from the cathode were examined on the addition of some chemicals, as the storage temperatures and time were changed. On the addition of 1000 ppm of H2O to 1.0 M LiPF6 solution in EC/DMC (1:2 in volume), 41% of capacity of the cathode was lost after 24 h storage at 80 degreesC, in contrast to 5% loss in the case of no additive. Water would be responsible for causing the capacity fading of the cathode under such condition as elevated temperatures. In the EC/DMC solution without LiPF6, on the contrary, no capacity fading was observed with H2O additive at 80 degreesC storage, while the CF3SO3H addition resulted in 40% of capacity fading. These results show that plausible acid derived from the reaction of LiPF6 with H2O causes the capacity fading on the lithium manganese oxide at 80 degreesC, relatively high storage temperature. On the other hand, addition of500-1000 ppm of (CH3)(3)SiNHSi(CH3)(3) resulted in less capacity fading ofthe cathode and made Mn dissolution decrease drastically. Therefore, dehydration and acid-neutralization in the electrolyte solution would restrain the capacity fading of the lithium manganese oxide cathode during high temperature storage, and we confirmed it in some experiments. (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 31/03/20 alle ore 10:03:25