Investigations of natural pyrite in solvent-free polymer electrolyte, lithium metal batteries

The reaction of natural pyrite and lithium was investigated in solvent-free, polymer electrolytes at medium temperature (90 °C). In such a system the full capacity of pyrite is accessed in the first discharge–charge cycle, however, the system is affected by a substantial capacity fading especially i...

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Bibliographic Details
Published in:Electrochimica acta 2004-08, Vol.49 (20), p.3419-3427
Main Authors: Montoro, L.A, Rosolen, J.M, Shin, J.H, Passerini, S
Format: Article
Language:English
Subjects:
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
LiBETI
Lithium battery
PEO
Pyrite
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Summary:The reaction of natural pyrite and lithium was investigated in solvent-free, polymer electrolytes at medium temperature (90 °C). In such a system the full capacity of pyrite is accessed in the first discharge–charge cycle, however, the system is affected by a substantial capacity fading especially in low rate discharges. The capacity fading observed is attributed to the irreversible reaction of the sulfur formed at the end of charge step and the polymer in the electrolyte. The investigation showed that the irreversible process occurring at 1.3 V is not the cause of the capacity fading but it is resulting from the reduction of the above mentioned oxidation products.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2004.03.010