文献类型：期刊文献

中文题名：Electrochemical investigation of the anode processes in LiF-NdF_(3)melt with low oxygen content

作者：Chen-ming Fan[1];Shi-zhe Liu[1];Jing-jiu Gu[1];Shi-you Guan[2];Jin-hua Zhao[3];Bing Li[1]

机构：[1]School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Institute for Sustainable Energy,College of Sciences,Shanghai University,Shanghai 200444,China;[3]Collaborative Innovation Center of Clean Energy,Longyan University,Longyan 364012,China

年份：2021

卷号：28

期号：3

起止页码：398

中文期刊名：International Journal of Minerals,Metallurgy and Materials

外文期刊名：矿物冶金与材料学报(英文版)

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；

基金：the National Natural Science Foundation of China(No.51774145).The“Minjiang Scholar”Program of Department of Education,Fujian Province,China was also acknowledged.

语种：英文

中文关键词：LiF-NdF_(3)melt;neodymium electrowinning;low oxygen content;anode processes

摘要：The oxidation of oxygen ions and the generation of an anode effect at a low oxygen content of 150 mg/kg were discussed in this paper.Cyclic voltammetry and square-wave voltammetry tests were conducted to explore the anodic processes of LiF-NdF_(3)melt after a lengthy period of pre-electrolysis purification at 1000℃(during which the oxygen content reduced from 413 to 150 mg/kg).The oxidation process of oxygen ions was found to have two stages:oxidation product adsorption and CO/CO_(2)gas evolution.The adsorption stage was controlled by diffusion,whereas the gas evolution was controlled by the electrochemical reaction.In comparison with oxygen content of 413 mg/kg,the decrease in the amplitude of the current at low oxygen content of 150 mg/kg was much gentler during the forward scanning process when the anode effect occurred.Fluorine-ion oxidation peaks that occurred at about 4.2 V vs.Li/Li+could be clearly observed in the reverse scanning processes,in which fluorine ions were oxidized and perfluorocarbons were produced,which resulted in an anode effect.