NDLI: Cathodic behavior of graphite in KF-AlF3-based melts with various cryolite ratios

Content Provider	Springer Nature Link
Author	Liu, Dongren Yang, Zhanhong Li, Wangxing Wang, Suqin Wang, Shenwei
Copyright Year	2010
Abstract	The cathodic behavior of graphite in KF-AlF3-based melt with various cryolite ratios (CR; molar ratio of KF to AlF3) were investigated by means of cyclic voltammetry, sampled-current voltammetry, and chronopotentiometry. The limiting current of aluminum deposition and critical current density of potassium intercalation on graphite cathode in KF-AlF3-based melt decreased with the increase of CR of the melt. Lowering the CR of KF-AlF3-based melt suppressed the potassium intercalation but enhanced the formation of aluminum carbide. In the KF-AlF3-based melt with CR of 1.0, formation of Al4C3 seriously occurred, which resulted not only from the chemical reaction of aluminum and carbon but also from the electrochemical reduction of carbon under higher overpotential. However, both the X-ray diffraction and scanning electron microscopy failed to detect the existence of potassium–graphite intercalation compound and Al4C3 in the resultants after galvanostatic electrolysis.
Starting Page	615
Ending Page	621
Page Count	7
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	15
Issue Number	3
e-ISSN	14330768
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-07-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Graphite KF-AlF3-based melt Cryolite ratio Cathode behavior Aluminum electrolysis Analytical Chemistry Electrochemistry Industrial Chemistry/Chemical Engineering Condensed Matter Physics Physical Chemistry Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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