Electrochemical investigation on kinetics of potassium intercalating into graphite in KF melt

Autor:	Zhanhong Yang, Ying-tao Luo, Shi-lin Qiu, Dongren Liu, Wang-xing Li
Rok vydání:	2011
Předmět:	Scanning electron microscope Potassium Diffusion Kinetics Inorganic chemistry Intercalation (chemistry) Metals and Alloys chemistry.chemical_element Chronoamperometry Geotechnical Engineering and Engineering Geology Condensed Matter Physics chemistry Materials Chemistry Graphite Cyclic voltammetry
Zdroj:	Transactions of Nonferrous Metals Society of China. 21:166-172
ISSN:	1003-6326
Popis:	The kinetics of potassium intercalating into graphite in molten KF at 1163 K was investigated by means of cyclic voltammetry and chronoamperometry. Cyclic voltammetry results indicate that intercalaltion/deintercalation of potassium into/from graphite involve kinetic limitations. The intercalation process of potassium was further confirmed to be governed by both the diffusion of potassium ion in graphite bulk and the phase transition kinetics through the analyses of current-time transient curves with reversible and quasi-reversible equations. The transfer coefficient of the intercalation reaction was calculated to be 0.364 according to the parameters resulting from nonlinear fitting of the current-time transient curves with a quasi-reversible equation. Analysis with scanning electron microscope shows that graphite matrix was severely eroded by intercalation of potassium.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c9f6a3027d4672ede917bdba562bdf7f https://doi.org/10.1016/s1003-6326(11)60694-8 Zobrazit plný text záznamu Full Text from ScienceDirect