Application of chemical synthesized polypyrrole for a rechargeable lithium battery

✍ Scribed by Hsien-Ming Wu; Hsiou-Jeng Shy; Hsien-Wen Ko

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 869 KB
• Volume: 27
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(89)80105-3

✦ Synopsis

Polypyrrole (PPy) deposited on a glass fibre separator was synthesized at room temperature by the vapour phase polymerization of pyrrole using FeC13 as an oxidant. The mechanism postulated for the oxidation reaction is based on inner-shell electron transfer. Lithium perchlorate dissolved in propylene carbonate was used as the electrolyte. Evidence for the electrochemical doping and undoping reaction was found in the cyclic voltammograms and the charge/discharge phenomena. A spiral-wound Li/PPy rechargeable battery was constructed and after 660 cycle tests its charge/ discharge efficiency was maintained above 90% and the energy density remained at 80% compared to the peak capacity (150th cycle). The factors such as surface area and morphology affecting the battery performance are discussed.