Lithium/sulfur dioxide rechargeable cells with cosolute or with tetrachloroaluminate electrolytes

Author

Schlaikjer, C.R. ; Jones, M.D. ; Torkelson, J.E. ; Johnson, A.P.

Author_Institution

Battery Eng., Inc., Hyde Park, MA, USA

fYear

1990

fDate

25-28 Jun 1990

Firstpage

181

Lastpage

184

Abstract

Lithium salts ordinarily slightly soluble in liquid sulfur dioxide may be made substantially soluble by the addition of soluble nonlithium salts, which apparently serve to increase the dielectric constant of the solution. Examples include KSCN/LiSCN and CsBr/LiBr. The chemical design allows the construction of cells without the need for organic cosolvents. The resistance to capacity fading in Li/SO₂/carbon cells with lithium tetrachloroaluminate may be improved by increasing the ratio of aluminum to sulfur dioxide from AlCl ₄^-/SO₂=1:6 to 1:3, and by lowering the concentration of hydrolysis products. Calcium tetrachloroaluminate lowers the freezing point without interfering with lithium cycling. Improved safety and overall cycling efficiency have also been observed

Keywords

electrochemistry; electrolytes; lithium; permittivity; secondary cells; sulphur compounds; C; Li-SO₂; LiAlCl₄; capacity fading; cosolute electrolytes; cycling efficiency; design; dielectric constant; freezing point; hydrolysis products; permittivity; rechargeable; safety; secondary cells; tetrachloroaluminate electrolytes; Aluminum; Batteries; Calcium; Dielectric constant; Electrodes; Fading; Lithium compounds; Organic chemicals; Safety; Solvents;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Sources Symposium, 1990., Proceedings of the 34th International

Conference_Location

Cherry Hill, NJ

Print_ISBN

0-87942-604-7

Type

conf

DOI

10.1109/IPSS.1990.145822

Filename

145822