Lithiated manganese oxide cathodes for rechargeable lithium batteries

Author

Abraham, IC M. ; Pasquariello, D.M. ; Hguyen, T.H. ; Jiang, Z. ; Peramunage, D.

Author_Institution

EIC Labs. Inc., Norwood, MA, USA

fYear

1996

fDate

9-12 Jan 1996

Firstpage

317

Lastpage

323

Abstract

Lithiated manganese oxides Li_xMn_yO₂ prepared at the low temperature of 400-450°C exhibited significantly different electrochemical properties than the spinel phase, LiMn₂O₄, formed at 650-850°C. The former was nonstoichiometric and yielded a capacity of ~0.7 LiMn₂ unit at ~2.8 V in polymer electrolyte-based Li cells. Its excellent rechargeability was demonstrated by more than 100 charge/discharge cycles. Spinel Li₂Mn₄ was formed by heating either a mixture of LiOH and MnO₂ or LiCO₃ and MnCO₃. The latter reaction yielded micron-sized LiMn₂O₄. Its capacity of ~0.8 Li/Mn₂O ₄ at ~4 V was highly reversible. AA-size Li-ion cells with spinel LiMn₂O₄ exhibited 100 Wh/Kg and 280 Wh/l

Keywords

electrochemical electrodes; electrochemistry; electrolytes; lithium; lithium compounds; manganese compounds; polymers; secondary cells; solid electrolytes; 2.8 V; 4 V; 400 to 450 C; Li-LiMnO; Li-ion secondary batteries; Li_xMn_yO₂ cathodes; capacity; charge/discharge cycles; electrochemical properties; nonstoichiometric; polymer electrolyte; reaction; rechargeability; rechargeable batteries; Batteries; Cathodes; Composite materials; Crystalline materials; Crystallization; Heating; Identity-based encryption; Lithium; Manganese; Polymers;

fLanguage

English

Publisher

ieee

Conference_Titel

Battery Conference on Applications and Advances, 1996., Eleventh Annual

Conference_Location

Long Beach, CA

Print_ISBN

0-7803-2994-5

Type

conf

DOI

10.1109/BCAA.1996.485016

Filename

485016