Room Temperature Molten Salts (Ionic Liquids) as Electrolytes in Rechargeable Lithium Batteries

Paper #:
  • 1999-01-1403

Published:
  • 1999-04-06
Citation:
Caja, J., Don, T., Dunstan, J., Katovic, V. et al., "Room Temperature Molten Salts (Ionic Liquids) as Electrolytes in Rechargeable Lithium Batteries," SAE Technical Paper 1999-01-1403, 1999, https://doi.org/10.4271/1999-01-1403.
Pages:
8
Abstract:
Molten salts are ionic, nonflammable, nonvolatile liquids with high ionic conductivity, oxidation voltage greater than 5 V vs. Li and high thermal stability (>300°C). So far the application of molten salts in batteries has been limited to those operating at relatively high temperature (>150°C). Rechargeable lithium-ion and lithium batteries have attained wide acceptance in both commercial and military applications. However, most of the solvents used in these cells are volatile and flammable; hence, they represent a significant safety hazard, especially, when operated at higher temperatures. Therefore the application of molten salts as electrolytes in lithium and lithium-ion cells containing LiMn2O4 (cathode) was investigated. The preliminary results show that rechargeable lithium and lithium-ion cells can be constructed and operated using molten salts as electrolytes. Test cells were cycled at ambient temperature and at higher temperature (55°C). They were cathode limited and their capacities ranged from 0.6 to 2 mAh. The open circuit voltage of charged cell was 4.2 V. Charge/discharge efficiencies were high (80%). However, the cells showed an increase of cell resistance with cycling which decreased the charge capacity (voltage limited) and efficient utilization of the cell capacity.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items