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ChemInform Abstract: Electrochemical Properties of a New Non-Stoichiometric Spinel Oxide (Mn2.5O4) as Li Insertion Compound.

✍ Scribed by L. SANCHEZ; J.-P. PEREIRA-RAMOS

Publisher: John Wiley and Sons
Year: 2010
Weight: 38 KB
Volume: 28
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199711011

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✦ Synopsis

2.5 O 4 ) as Li Insertion Compound.

-The chronopotentiometric curve for the reduction of a Mn 2.5 O 4 spinel oxide based electrode in 1 M LiClO 4 /propylene carbonate at 20 • C and a constant current of 100 µA cm -2 shows two well-defined steps in the potential range 3.5-2.0 V and 2.0-1.5 V with faradaic yields of ≈ 0.6 and ≈1.0 F mol -1 , respectively. For the electrochemically reduced samples, Li insertion of ¿ 0.65 per mol induces a loss of the integrety of the spinel structure. In galvanostatic cycling experiments in the potential range 4.0 -2.0 V, a stable specific capacity of ≈43 mAh g -1 is obtained after the twentieth cycle. -(SANCHEZ, L.; PEREIRA-RAMOS,

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