Title :
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
Abstract :
Lithiated manganese oxides LixMnyO2 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; LixMnyO2 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;
Conference_Titel :
Battery Conference on Applications and Advances, 1996., Eleventh Annual
Conference_Location :
Long Beach, CA
Print_ISBN :
0-7803-2994-5
DOI :
10.1109/BCAA.1996.485016
