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Study of phase changes during 500 full cycles of Li/composite polymer electrolyte/FeS2 battery by E. Strauss; D. Golodnitsky; E. Peled is a Engineering article available to read on EtoBox.

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There is a growing demand for the development of high-energy-density lithium batteries for a number of applications including electric vehicles (EV), energy storage and space. The Li/composite polymer electrolyte (CPE)/pyrite battery, which has a high theoretical energy density (about 810 Wh kg -1 based on 2.8e/FeS 2 ), and is made of cheap, non-toxic and green compounds is a good candidate for EV applications. Materials cost is estimated at 50$ kWh -1 five times lower than that of other lithium and lithium-ion batteries. Over 500 100% DOD cycles (at c 3 rate) with a capacity fading rate of less than 0.1% per cycle were carried out in a small (1 cm 2 area) laboratory prototype cells with 7 mm-thick cathodes. Charge-discharge processes in the Li/LiI (PEO) n Al 2 O 3 -based CPE/pyrite battery during long-term cycle life have been analyzed with the use of dq/dV curves. These studies furnish insights into the electrochemical behavior of pyrite in polymer electrolyte-systems. Up to seven phases have been identified and found to change during the first 50-100 cycles. These phases do not change much over the subsequent 400 cycles. The major phases have been recently identified by EXAFS an

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Author

E. Strauss; D. Golodnitsky; E. Peled

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0013-4686)

Published

2000

Language

EN

Field

Engineering (Physical Sciences)