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Electrochemical Performance of Chemically Synthesized Oligo-indole as a Positive Electrode for Lithium Rechargeable Batteries
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- Authors
- Kwang Sun Ryu, Kwang Man Kim
- Issue Date
- 2008-04
- Citation
- Journal of Applied Electrochemistry, v.38, no.4, pp.477-482
- ISSN
- 1572-8838
- Language
- English
- Type
- Journal Article
- Abstract
- Indole monomer was chemically polymerized to produce polyindole (PI) powder for use as a positive electrode material for lithium rechargeable batteries. Although the PI obtained was an oligomer with a low molecular weight corresponding to just 3 indole units, its electrochemical properties exhibited high d.c. electric conductivity comparable to that of the highly conducting polyaniline-LiPF6 or LiAsF6. A charge separation mechanism was also suggested to describe charge/discharge behavior of the oligo-indole (OI) protonated and/or lithiated in the Li||OI battery. Moreover, the lithium rechargeable battery adopting the OI as a positive electrode showed good cycleability with a discharge capacity of ~ 55 mAh g-1, which did not decay until after more than 100 cycles. © 2007 Springer Science+Business Media B.V.