LiF-BaF2-LiCl熔盐体系中Li+的电化学行为
收稿日期: 2015-09-21
修回日期: 2015-10-11
网络出版日期: 2015-11-19
基金资助
国家自然科学基金项目(No. 3203204516)资助
The Electrochemical Behavior of Li+ in LiF-BaF2-LiCl Molten Salt System
Received date: 2015-09-21
Revised date: 2015-10-11
Online published: 2015-11-19
杨少华 , 王 君 , 赖晓晖 , 王浩然 . LiF-BaF2-LiCl熔盐体系中Li+的电化学行为[J]. 电化学, 2016 , 22(3) : 306 -310 . DOI: 10.13208/j.electrochem.150918
The electrochemical reduction process and rate determining step of Li ion on a tungsten electrode at 1203 K in a LiF-BaF2-LiCl molten system were studied by cyclic voltammetry, chronoamperometry and chronopotentiometry methods using a three-electrode system and electrochemical workstation AUTOLAB. The results showed that the reduction potential of Li ion was at around -1.0 V on a tungsten electrode as compared with a platinum electrode. The reduction process of Li ion on a tungsten electrode occurred in a single step with the exchange of one electron. Chronoamperograms indicated that the cathode process was controlled by the diffusion step of ions and the diffusion coefficient was calculated to be 4.5 × 10-6 cm2•s-1.
Key words： molten salt; cathode process; electrochemical; diffusion control
[1] Zhang M J(张明杰), Guo Q F(郭清富). Energetic metal of the 21st century-the situation and development of lithium metallurgy[J]. Journal of Salt Lake Research(盐湖研究), 2001, 9(3): 52-60.
[2] China Nonferrous Metals Industry Association(中国有色金属工业协会). Series of nonferrous metals. Lithium, rubidium and cesium of china[M]. Beijing: Metallurgical Industry Press(冶金工业出版社), 2013.
[3] Kuhn A T. Industrial electrochemical process[M]. London: Elesevier, 1971: 207-209.
[4] Zhang M J(张明杰), Li J D(李继东), Wang Y W(王耀武). Electrochemical behavior of lithium carbonate in KCl-LiCl melt[J]. Journal of Northeastern University: Natural Science(东北大学学报: 自然科学版). 2005, 26(6): 570-573.
[5] Yan Y D(颜永得), Zhang M L(张密林), Han W(韩伟), et al. Prepartion and theory analysis of Mg-Li alloys via codeposition in KCI-LiCI-MgCl2 melts[J]. Chinese Journal of Inorganic Chemistry(无机化学学报), 2008, 24(6): 902-906.
[6] Yan Y D, Zhang M L, Xue Y, et al. Electrochemical study of the codeposition of Mg-Li-Al alloys from LiCI-KCl-MgCl2-AlCl3 melts[J]. Journal of Applied Electrochemistry, 2009, 39(3): 455-461.
[7] Cao P, Zhang M L, Han W, et al. Preparation of ternary Mg-Li-Sn alloys from molten salt by electrolysis[J]. Acta Metallurgica Sinica: English Letters, 2012, 25(4): 265-271.
[8] Dai X F(戴兴福), Zhang M J(张明杰), Tan Y J(谭亚菊). Preparation of Al-Li master alloys by molten salt electrolysis[J]. Light Metals(轻金属), 1998, 1: 38-41.
[9] Xu J F(许建峰). Preparation and mechanism research of Ba-Li alloy and Zn-Ba-Li alloy via molten salt electrolysis process[D]. Harbin Engineering University, 2011. DOI: 10.7666/d.y2053200.
[10] Li J D(李继东), Zhang M J(张明杰). Zhang Y A(张延安), et al. Preparation of Al-Li master alloys by molten salt electrolysis[J]. The Chinese Journal of Nonferrous Metals(中国有色金属学报), 2008, 18(8): 1555-1559.
[11] Liu J N(刘江宁), Sun Z(孙泽), Jin X W(晋心文), et al. The cathodic reduction of magnesium in KCl-NaCl-MgCl2 melts on a platinum electrode[J]. Nonferrous Metals: Extractive Metallurgy(有色金属: 冶炼部分), 2007, 6: 35-38.
[12] Chen Z(陈增), Zhang M L(张密林), Han W(韩伟), et al. Electrochemical reduction of Zr(IV) in the LiCl-KCl molten salt[J]. Rare Metal Materials and Engineering(稀有金属材料与工程), 2009, 38(3): 456-459.
[13] Bard A J, Faulkner L R. Electrochemical fundamentals and applications (2nd Edition)[M]. New York: John Wiley and Sons INC., 2003: 225- 227.
[14] Li M(李梅), Sun T T(孙婷婷), Liu B(刘斌), et al. Electrochemical behavior of Dy(Ⅲ) and the selective formation of Dy-Ni intermetallic compounds in LiCl-KCl eutectic melts[J]. Acta Physico-Chimica Sinica, 2015, 31(2): 309-314.
[15] Barde A J, Faulkner L R. Electrochemical methods, fundamentals and applications[M]. Beijing: Chemical Industry Press(化学工业出版社), 2005: 159.
[16] Paul M S Monck. Fundamentals of electroanalytical chemistry[M]. Beijing: Chemical Industry Press(化学工业出版社), 2001: 100-101.
[17] Greef R, Peat R, Pletcher L M, et al. Instrumental methods in electrochemistry[M]. London: Ellis Hrwood, 1990: 316- 317.
[18] McDonald D D. Transient techniques in electrochemistry[M]. New York: Plenum Press, 1977: 365-367.
/
| 〈 |
|
〉 |
