LiMn1.95M0.05O4 (M : Al, Co, Fe, Ni, Y) cathode materials prepared by combustion synthesis

Citation
Hj. Choi et al., LiMn1.95M0.05O4 (M : Al, Co, Fe, Ni, Y) cathode materials prepared by combustion synthesis, J POWER SOU, 103(1), 2001, pp. 154-159
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics","Environmental Engineering & Energy
Journal title
JOURNAL OF POWER SOURCES
ISSN journal
0378-7753 → ACNP
Volume
103
Issue
1
Year of publication
2001
Pages
154 - 159
Database
ISI
SICI code
0378-7753(200112)103:1<154:L(:ACF>2.0.ZU;2-0
Abstract
Spinel LiMn1.95M0.05O4 (M: Al, Co, Fe, Ni, or Y) is prepared by a combustio n synthesis, which is a simple, rapid and cost-effective process for obtain ing oxide powders. The spinel is obtained by combustion of lithium hydroxid e, manganese nitrate. M-nitrates, and urea at about 280 degreesC for 1 min. Well-defined spinel LiMn1.95M0.05O4 was obtained by further heat-treatment at 800 degreesC for 10 h. The synthesized LiMn1.95M0.05O4 shows lower init ial capacities, viz. 90-132 mAh/g than undoped LiMn2O4. The latter has an i nitial capacity of 146 mAh/g which fades to 100 mAh/g with cycling. On the other hand, LiMn1.95Co0.05O4, LiMn1.95Ni0.05O4, and LiMn1.95Y0.05O4 display better cycleability than LiMn2O4. (C) 2001 Elsevier Science B.V. All right s reserved.