Transport of intercalated anions in graphite according to Walden's rule

✍ Scribed by U. Tormin; F. Beck

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 809 KB
• Volume: 40
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(94)00329-y

✦ Synopsis

Ahstraet-Chronoamperometry

and electrochemical impedance spectroscopy were employed to determine the diffusion coelficients in the solid state D, for anions HSO; (from H,SO, in three protic solvents) and CIO; (from LiCIO, in three aprotic solvents), which are intercalated in graphite. Strong convection in the electrolyte was provided to minimize the time constant for the transport in the electrolyte diffusion layer. Ds x 10e5 and 10-6cm2s-' were found for these categories. The Walden products r) . D, were identified to be constant (r) = specific viscosity in the bulk liquid). It is concluded, that the anions move in the solid in an environment which is similar to the liquid electrolyte due to cointercalation of solvent molecules.