Application of Electrochemically Formed Polyazulene to Rechargeable Lithium Battery

Tetsuya Osaka, Katsuhiko Naoi, Takayuki Hirabayashi

研究成果: Article査読

26 被引用数 (Scopus)

抄録

An electrochemically formed polyazulene(PAz), one of the electroconductive polycyclic hydrocarbons, was studied for its electrochemical properties in order to examine the possibility of utilizing it as a cathode active material of rechargeable lithium battery. The electrode kinetics of PAz film electrode, especially the anion doping-undoping process, were investigated mainly with cyclic voltammetry and FFT impedance method. The cyclic voltammetric results of PAz film showed a highly reversible redox process. Cole-Cole plots for PAz electrode obtained by impedance measurement as a function of doping potential were also found to offer an indication that PAz can be an excellent battery material. The charging-discharging property, and the cyclability of a Li/LiClO4-PC(propylene carbonate)/PAz battery were then studied as a function of the film thickness of PAz cathode. The charging-discharging behavior of Li/LiClO4-PC/PAz was also compared with those of Li/LiClO4-PC/polypyrrole and Li/LiClO4-PC/polyaniline batteries, which had been examined earlier. When compared with Li/LiClO4-PC/polypyrrole or Li/LiClO4-PC/polyaniline batteries, a Li/LiClO4/PAz battery showed fairly high and constant discharge voltage (ca. 3.2V), while keeping 100% of coulombic yield. Inspection by SEM showed that the surface condition of PAz film greatly resembled that of polypyrrole, however, a 10 C cm-2PAz film was prepared with thicker than polypyrrole formed with the same amount of charge of 10 C cm-2.

本文言語English
ページ(範囲)2645-2649
ページ数5
ジャーナルJournal of the Electrochemical Society
134
11
DOI
出版ステータスPublished - 1987 11

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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