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

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · Journal of the Electrochemical Society; (USA)

DOI:https://doi.org/10.1149/1.2097420· OSTI ID:7174848

Naoi, K ^[1]; Ueyama, K; Osaka, T ^[2]

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1. Dept. of Chemical Engineering and Materials Science, Univ. of Minnesota, Minneapolis, MN (US)
2. Dept. of Applied Chemistry, School of Science and Engineering, Waseda Univ, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169 (JP)

Electrodeposited polyazulene (PAz) films show high electoactivity 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. The authors determine 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 pplymerizing current density and formation charge. Charge capacity showed a maximum value when polymerized at 1.4 mAcm{sup {minus} 2} by passage of 5C cm{sup {minus} 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{sup {minus} 2}. The charge-discharge property and cylability of Li/LiCIO{sub 4}/PAz batteries were studied. Li/LiCIO{sub 4}/PAz batteries were studied. Li/LiCIO{sub 4}/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/LiCIO{sub 4}/PAz battery performed best when PAz film was formed at 1.4 mA cm{sup {minus} 2} by passage of 5C cm{sup {minus} 2}.

• OSTI ID: 7174848
• Journal Information: Journal of the Electrochemical Society; (USA), Journal Name: Journal of the Electrochemical Society; (USA) Vol. 136:9; ISSN JESOA; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ALKALI METALS
BATTERY CHARGING
CHARGE TRANSPORT
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
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ELECTROCHEMICAL CELLS
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ELECTRODES
ELECTRON MICROSCOPY
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KINETICS
LITHIUM
MATERIALS TESTING
METALS
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PERFORMANCE
POLYMERIZATION
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SCANNING ELECTRON MICROSCOPY
TESTING
THIN FILMS
VOLTAMETRY