Electrolytes for Low Temperature Lithium-Ion Cells 981246
Lithium-ion rechargeable batteries have been demonstrated to have high energy density, high voltage, and excellent cycle life which make this technology more attractive than competing systems such as Ni-Cd and Ni-H2. However, the SOA cells fail to meet certain requirements necessary for various future NASA missions, such as good low temperature performance. Under a program sponsored by the Mars Exploration Program we have developed an organic non-aqueous electrolyte which has been demonstrated to result in improved low temperature performance of lithium-ion cells. The electrolyte formulation which has resulted in excellent low temperature performance, as well as good cycle life performance at both ambient and low temperatures, consists of a 1.0M solution of a lithium salt, lithium hexafluoro-phosphate (LiPF6), dissolved in a mixture of carbonates: ethylene carbonate + dimethyl carbonate + diethyl carbonate (1:1:1). Prototype cells with the improved electrolyte showed high capacity at low temperature (-20° to -40°C), high rate capabilities, and good cycle life at low temperature. These improvements were achieved through advances in materials development and cell design concepts.
Citation: Smart, M., Ratnakumar, B., Huang, C., and Surampudi, S., "Electrolytes for Low Temperature Lithium-Ion Cells," SAE Technical Paper 981246, 1998, https://doi.org/10.4271/981246. Download Citation
Author(s):
M. C. Smart, B. V. Ratnakumar, C.-K. Huang, S. Surampudi
Affiliated:
California Institute of Technology
Pages: 10
Event:
Aerospace Power Systems Conference
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Aerospace Power Systems Conference Proceedings-P-322, SAE 1998 Transactions - Journal of Aerospace-V107-1
Related Topics:
Lithium-ion batteries
High voltage systems
Electrolytes
Lithium
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »