The use of the reactive ether, tetrahydrofuran (THF), in rechargeable lithium cells

The usefulness of tetrahydrofuran (THF) as a cosolvent with 2-methyl-tetrahydrofuran (2-Me-THF)/LiAsF6 for improving the low temperature rate capability of rechargeable Li cells has been explored. Lithium-titanium disulphide cells utilizing 2-Me-THF/LiAsF6 blended with 15–50 vol% THF have shown substantially improved rate characteristics at 0 and −10 °C. In addition, the Li electrode in such cells has exhibited practically useful cycling efficiencies.