Mixed ether electrolytes for secondary lithium batteries with improved low temperature performance

Tetrahydrofuran (THF): 2-methyl-tetrahydrofuran (2Me-THF)/LiAsF sub(6) mixed solutions, despite their lower conductivity, have allowed significantly better low temperature performance in Li/TiS sub(2) cells than have THG/LiAsF sub(6). super(13)C NMR data suggest that this may be related to the struc...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1986-04, Vol.133 (4), p.661-666
Main Authors: ABRAHAM, K. M, PASQUARIELLO, D. M, MARTIN, F. J
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Other techniques and industries
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Summary:Tetrahydrofuran (THF): 2-methyl-tetrahydrofuran (2Me-THF)/LiAsF sub(6) mixed solutions, despite their lower conductivity, have allowed significantly better low temperature performance in Li/TiS sub(2) cells than have THG/LiAsF sub(6). super(13)C NMR data suggest that this may be related to the structurally disordered Li super(+)-solvated that exist in the mixed ether solutions. High cycling efficiencies for the Li electrode in THF:2Me-THF/LiAsF sub(6) solutions have been achieved by the use of 2Me-F as an additive. A 5 Ah capacity Li/TiS sub(2) cell has been cycled more than 100 times at 100% depth-of-discharge, with the cell capacity remaining at over 3 Ah at the 100th cycle.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2108650