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Electrochemical properties of a new non-stoichiometric spinel oxide (Mn2.5O4) as Li insertion compound

✍ Scribed by Luis Sánchez; Jean-Pierre Pereira-Ramos

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
440 KB
Volume
42
Category
Article
ISSN
0013-4686

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✦ Synopsis

Preliminary results on electrochemical and structural properties of the cation deficient oxide Mnr.sOd system are discussed in terms of its viability as an electrode for rechargeable lithium batteries. Chronopotentiometric measurements show two well-defined steps in the potential range of 3.5 V-2.0 V and 2.0 V-l.5 V, involving faradaic yields of 20.6 and = 1.0 F mol-' respectively. A loss of structural integrity was observed for Li ion contents higher than 0.65 per mol. Galvanostatic cycling experiments were performed in the voltage range 4.0-2.0 V and a specific capacity of 43 mAh g-l was obtained after the twentieth cycle.

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