Electrochemical synthesis and characterization of ferric chloride-graphite intercalation compounds in aqueous solution

✍ Scribed by Feiyu Kang; Yang Leng; Tong-Yi Zhang; Bensheng Li

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 788 KB
• Volume: 36
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/s0008-6223(97)00195-4

✦ Synopsis

Electrochemical synthesis

of FeCl,-graphite intercalation compounds (GICs) in aqueous solution was studied by chronoamperometric, chronopotentiometric and cyclic voltammetric methods.

Using 6610~ FeCl,-aqueous solutions, FeCI,-GICs with stage 2-6 and/or mixed stage structures were synthesized by an anodic oxidation, evidenced by both X-ray diffraction patterns and Raman spectra.

The chemical formula of the synthesized GICs is experimentally determined as C,_,,FeCl, mH,O, in which n denotes the stage number, and m varies from 1 to 3. A formation diagram for FeCl,-GICs is experimentally constructed in terms of electrolyte concentration and applied potential. Addition of hydrochloric acid into the FeCl,-aqueous solution extends the potential window for intercalation and promotes the oxidation. The GIC synthesized in pure aqueous solution is more stable in air than that synthesized in the solution with hydrochloric acid.