Catalytic additives for the reversible reduction of sodium in chloroaluminate ionic liquids

被引：10

作者：

Lang, Christopher M. ^{[1
]}

Kim, Ketack ^{[1
]}

Kohl, Paul A. ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA

来源：

ELECTROCHIMICA ACTA | 2006年 / 51卷 / 19期

关键词：

chloroaluminate; ionic liquid; quaternary ammonium cation; sodium deposition; battery electrolyte;

D O I：

10.1016/j.electacta.2005.11.022

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The ability of five different compounds to facilitate reduction of sodium from a chloroaluminate IL was investigated. PCl6- and 18-Crown-6 act to disrupt the Na+ and AlCl4- ion pairs producing reducible sodium ions. The addition of the small chlorinated compounds, CH2Cl2, CDCl3 or CCl4, resulted in the efficient reduction and reoxidation of sodium. It is believed that the electronegative chlorine atoms are oriented near the positive sodium cation, weakening its attraction to AlCl4-. For the five compounds tested, the highest coulombic efficiencies were measured after the addition of CDCl3 (90.5%) and CCl4 (88.2%). The addition of CDCl3 was found to substantially increase the conductivity of the IL. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：3884 / 3889

页数：6

共 21 条

[1] A SODIUM IRON(II) CHLORIDE CELL WITH A BETA-ALUMINA ELECTROLYTE [J].

BONES, RJ ;

COETZER, J ;

GALLOWAY, RC ;

TEAGLE, DA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1987, 134 (10) :2379-2382

[2] Electrochemistry of gallium in the Lewis acidic aluminum chloride-1-methyl-3-ethylimidazolium chloride room-temperature molten salt [J].

Chen, PY ;

Lin, YF ;

Sun, IW .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (09) :3290-3294

[3] RECHARGEABLE LITHIUM AND SODIUM ANODES IN CHLOROALUMINATE MOLTEN-SALTS CONTAINING THIONYL CHLORIDE [J].

FULLER, J ;

OSTERYOUNG, RA ;

CARLIN, RT .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1995, 142 (11) :3632-3636

[4] Plating end shipping of sodium from a room temperature 1,2-dimethyl-3-propylimidazolium chloride melt [J].

Gray, GE ;

Winnick, J ;

Kohl, PA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (07) :2262-2266

[5] Plating and stripping of sodium from a room temperature 1-methyl-3-propylimidazolium chloride melt [J].

Gray, GE ;

Winnick, J ;

Kohl, PA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (12) :3820-3824

[6] STABILITY OF SODIUM ELECTRODEPOSITED FROM A ROOM-TEMPERATURE CHLOROALUMINATE MOLTEN-SALT [J].

GRAY, GE ;

KOHL, PA ;

WINNICK, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1995, 142 (11) :3636-3642

[7] Properties of asymmetric benzyl-substituted ammonium ionic liquids and their electrochemical properties [J].

Kim, K ;

Lang, CM ;

Kohl, PA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (02) :E56-E60

[8] The role of additives in the electroreduction of sodium ions in chloroaluminate-based ionic liquids [J].

Kim, K ;

Lang, C ;

Kohl, PA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (01) :E9-E13

[9] Electrochemical investigation of quaternary ammonium/aluminum chloride ionic liquids [J].

Kim, K ;

Lang, C ;

Moulton, R ;

Kohl, PA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (08) :A1168-A1172

[10] Electrodeposition of aluminum from the aluminum chloride-1-methyl-3-ethylimidazolium chloride room temperature molten salt plus benzene [J].

Liao, Q ;

Pitner, WR ;

Stewart, G ;

Hussey, CL ;

Stafford, GR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (03) :936-943

← 1 2 3 →