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Titolo:
Microvoltammetry for cathode materials at elevated temperatures: electrochemical stability of single particles
Autore:
Dokko, K; Horikoshi, S; Itoh, T; Nishizawa, M; Mohamedi, M; Uchida, I;
Indirizzi:
Tohoku Univ, Grad Sch Engn, Dept Appl Chem, Aoba Ku, Sendai, Miyagi 9808579, Japan Tohoku Univ Sendai Miyagi Japan 9808579 Ku, Sendai, Miyagi 9808579, Japan
Titolo Testata:
JOURNAL OF POWER SOURCES
fascicolo: 1, volume: 90, anno: 2000,
pagine: 109 - 115
SICI:
0378-7753(200009)90:1<109:MFCMAE>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROELECTRODE TECHNIQUE; CAPACITY LOSSES; LITHIUM-ION; CELLS; INTERCALATION; DISSOLUTION; BATTERIES; DISCHARGE; CARBON;
Keywords:
microelectrode; single particle; cycle stability; lithium ion battery; lithium manganese oxide; lithium cobalt oxide;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Uchida, I Tohoku Univ, Grad Sch Engn, Dept Appl Chem, Aoba Ku, 07 Aramaki Aoba, Sendai, Miyagi 9808579, Japan Tohoku Univ 07 Aramaki Aoba Sendai Miyagi Japan 9808579 9, Japan
Citazione:
K. Dokko et al., "Microvoltammetry for cathode materials at elevated temperatures: electrochemical stability of single particles", J POWER SOU, 90(1), 2000, pp. 109-115

Abstract

The electrochemical stability of single particles of cathode materials (LiMn2O4, Li1.10Cr0.048Mn1.852O4, LiCoO2 and LiNi0.85Co0.15O2) was investigated by means of a microelectrode technique at 25 degrees C and 50 degrees C. The cycle stability was evaluated by multi-cyclic voltammetry. LiMn2O4 showed good cycle stability in LiClO4/propylene carbonate (PC) + ethylene carbonate (EC) and LiBF4/PC + EC solutions even at 50 degrees C. On the contrary, in LiPF6/PC + EC, significant capacity fading during charge-discharge wasobserved at 50 degrees C. The cycle stability of LiMn2O4 in the latter solution was improved by partial substitution of Mn by Cr and Li. Regarding LiCoO2, its cycle life in LiClO4/PC + EC at 50 degrees C was unsatisfactory when the potential was scanned between 3.60 and 4.30 V. On the other hand, LiCoO2 retained 90% of its capacity when the potential scan was limited to 4.00 V. LiNi0.85Co0.15O2 showed similar trend at 50 degrees C. (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 11/07/20 alle ore 07:45:54