New organodisulfide—polyaniline composite cathode for secondary lithium battery

✍ Scribed by T. Sotomura; H. Uemachi; K. Takeyama; K. Naoi; N. Oyama

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 322 KB
• Volume: 37
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(92)85089-4

✦ Synopsis

Abatnct-A new composite cathode used for high-energy density secondary lithium batteries is developed, which consists of 2,5-dimercapto-1,3,4-thiadiaxole (organodisultlde), polyaniline, and gel electrolyte. Polyaniline works to promote the redox reaction of the organodisuhide in the composite electrode, providing the cyclic voltammogram showing a narrower peak-potential separation of 0.5 V between cathode and anode peaks. The lithium cell using the composite cathode and gel electrolyte based on acrylonitrile-methylacrylate copolymer has over 3.0 V cell voltage with 303 Wh kg-' cathode energy density at a current density of 0.1 mA cme2 at room temperature. In practice, a model cell with 80 pm thick lithium anode, 50 pm thick gel electrolyte, and 170 pm thick composite cathode is expected to deliver 220 Wh kg-' cell energy density at 0.1 mA cme2.