𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Transport of intercalated anions in graphite—an electrochemical investigation

✍ Scribed by Holger Krohn

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
934 KB
Volume
23
Category
Article
ISSN
0008-6223

No coin nor oath required. For personal study only.

✦ Synopsis

Three electrochemical methods: I) open circuit potential relaxation after galvanostatic charging; 2) Devanathan method with graphite membrane electrode; 3) chronodmperometry, evaluation of Cottrell's equation; have been systematically applied to the investigation of transport of aniom (HSO;, HCIO; , HF? ) intercalated in various crystalline graphite materials from aqueous acids. For HSO; anions, the chemical diffusion coefficient for the diffusion parallel to the graphite planes is found to be D = 2. IO-' cm' s '. and the activation energy is E, = 1 I kJ mole -'. The larger CIO, anion leads to a decrease of D and an mcrease of E, by a factor 2-3.

The high mobility in the solid is explained in terms of cointercalated acid molecules and water molecules, leading to a quasi-liquid environment between the graphite planes.

📜 SIMILAR VOLUMES

Transport of intercalated anions in grap
Transport of intercalated anions in graphite according to Walden's rule
✍ U. Tormin; F. Beck 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 809 KB

## 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 co

An electrochemical investigation of grap
An electrochemical investigation of graphite surfaces
✍ K.F. Blurton 📂 Article 📅 1973 🏛 Elsevier Science 🌐 English ⚖ 547 KB

Current-potential curves were determined during the application of a triangular potential sweep to a graphiteelectrode immersed in acid electrolyte. A maximum of 3 anodic and 3 cathodic peaks were observed in these curves depending on the experimentalconditions. The anodic peaks in the potential ran

Electrochemical synthesis of graphite in
Electrochemical synthesis of graphite intercalation compounds in ZnCl2 aqueous solutions
✍ F. Kang; Y. Leng; T.-Y. Zhang 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 474 KB

An electrochemical method of synthesizing ZnCl, graphite intercalation compounds (GICs) in aqueous solutions was studied using chronoamperometry and chronopotentiometry. After electrochemical reaction of natural graphite, ZnCl,-GICs with stage 3-7 and/or mixed stage structures were evident from bot