Electrochemical preparation of the graphite bi-intercalation compound with H2SO4 and FeCl3

✍ Scribed by H Shioyama; K Tatsumi; R Fujii; Y Mizutani

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 443 KB
• Volume: 28
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(90)90102-5

✦ Synopsis

Stage-n Fe&GICs (n = 2,3) prepared in the standard two-zone method were oxidized galvanostatically in H,SO,. The electrode potential vs. electric quantity curves observed during the treatment and the X-ray powder patterns of the products showed clearly the intercalation of H,SO, into FeCI,-GICs and the formation of the graphite bi-intercalation compounds (GBCs) of FeCI, and H,SO,. The 2 axis repeat distance I, of the GBCs, 17.38& from the stage-2 FeCI,-GIC was equal to the sum of those of FeCI,-GIC, 9.38& and of H,SO,-GIC. 8.00.& From the stage-3 FeCI,-GIC the compound with Z, of 25.38A (= 9.38A + 8.OOA + B.OOA), through the intermediate with I, of 20.73a (= 9.38A + 3.35A + B.OOAj. The electrochemical reduction of these GBCs suggested that the intercalation of HZSOI into Fe&GICs is reversible.