CuO cathode in lithium cells—III. Its discharge kinetics

✍ Scribed by Petr Novák

• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 496 KB
• Volume: 31
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(86)80129-3

✦ Synopsis

The kinetics of discharge of CuO cathode was followed in 1 M LiCIO, in propylene carbonate. The cathode intercalation reaction is probably accompanied by several parallel and follow-up reactions. The reduction of CuO is irreversible and is controlled by transport in solid phase at current densities j up to 0.04 mA cm '; a contribution of activation control sets in at higher current densities. The dependence of the closed circuit potential on j can formally be expressed by the Tafel equation E = A -B In 1 j I. NOMENCLATURE Tafel constant, V Tafel constant, V theoretical capacity of CuO, 0.674 Ah g I thickness of the CuO layer, pm closed circuit potential, V open circuit potential, V peak potential, V ohmic potential drop, V current density, mA cmez peak current density, mAcm_' charge delivered from unit geometric surface area of electrode, cm-* scan rate, mV mint number of atoms or electrons activation overpotential, V concentration overpotential at the time T after current interruption, V time, s rotation speed, min-1