ISSN:
1433-0768
Keywords:
Key words Metal/organic precursors
;
Lithium manganese oxides
;
Lithium batteries
;
Polyol medium
;
Reaction mechanism
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The spinel phases Li1+ y Mn2− y O4 have been synthesized by a novel synthesis method that presents advantages compared to the classical ceramic method, namely, in terms of preparation time, costs and electrochemical performances of the resulting products. This consists of a two-stage process. First, two precursor phases (Li-EG and Mn-EG) are synthesized by reacting powdered lithium hydroxide and electrolytic manganese dioxide (EMD) in ethylene glycol (EG) under reflux, respectively. Secondly, the precursor products are mixed and heat treated under air, following various heating sequences, to produce electrochemically active Li1+ y Mn2− y O4 powders of well-defined morphology. Once the synthesis parameters involved in these two steps are controlled, the obtained Li1+ y Mn2- y O4 powders exhibit electrochemical performances that compare favorably with those observed in the case of the high-temperature (HT) Li1+ y Mn2− y O4 made by the ceramic route, both in terms of reversible/irreversible capacities and cycling behavior at 25 °C and 55 °C.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100080050078
Permalink