Electrochemical study on charge-discharge performance of lithium/polyazulene battery

Katsuhiko Naoi, Tetsuya Osaka, Tetsuya Osaka

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Electrodeposited polyazulene (PAz) films show high electroactivity and fast redox switching behavior when polymerized under suitable conditions. Such PAz films are more electroactive than electrodeposited polypyrrole or polyaniline and were successfully applied in a rechargeable lithium battery. We determined suitable polymerization conditions so as to obtain an electroactive PAz film possessing the highest charge-storing ability and fastest electrode processes. Specifically, the electrochemical kinetics (anion doping-undoping process) of PAz films was investigated by varying the polymerizing current density and formation charge. Charge capacity showed a maximum value when polymerized at 1.4 mA cm-2 by passage of 5C cm-2. Cyclic voltammograms coupled with scanning electrons microscope observation of PAz films evidenced that a highly electroactive PAz film can be prepared at 1.4 mA cm-2. The charge-discharge property and cyclability of Li/LiClO4/PAz batteries were studied. Li/LiClO4/PAz batteries showed fairly high and flat discharge voltage (ca. 3.2V), while maintaining 100% coulombic efficiency when charging by ca. 45% of doping level (per unit cathode weight). The Li/LiClO4/PAz battery performed best when PAz film was formed at 1.4 mA cm-2 by passage of 5C cm-2.

Original languageEnglish
Pages (from-to)2444-2449
Number of pages6
JournalJournal of the Electrochemical Society
Volume136
Issue number9
Publication statusPublished - 1989 Sep

Fingerprint

Lithium batteries
lithium batteries
electric batteries
Doping (additives)
polypyrroles
Polypyrroles
Polyaniline
polyazulene
charging
Cathodes
Current density
Electron microscopes
Negative ions
polymerization
electron microscopes
cathodes
Polymerization
current density
anions
Scanning

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Electrochemical study on charge-discharge performance of lithium/polyazulene battery. / Naoi, Katsuhiko; Osaka, Tetsuya; Osaka, Tetsuya.

In: Journal of the Electrochemical Society, Vol. 136, No. 9, 09.1989, p. 2444-2449.

Research output: Contribution to journalArticle

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