Lithium tetrafluoro oxalato phosphate as electrolyte additive for lithium-ion cells.
Lithium tetrafluoro oxalato phosphate (LTFOP) was investigated as an electrolyte additive to improve the life of mesocarbon microbead (MCMB)/Li{sub 1.1}[Ni{sub 1/3}Co{sub 1/3}Mn{sub 1/3}]{sub 0.9}O{sub 2} (NCM) cells for high power applications. With the addition of 1-3 wt % LTFOP to MCMB/NCM cells, the capacity retention after 200 cycles at 55 C significantly improved. Electrochemical impedance spectroscopy showed that the LTFOP addition in the electrolyte increased the initial impedance but lowered the impedance growth rate during cycling. Aging tests at 55 C indicated that the capacity retention of the negative electrode significantly benefited as a result of the LTFOP addition. Differential scanning calorimetry showed that the safety of the lithiated MCMB is significantly improved with the LTFOP addition.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- EE
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 977366
- Report Number(s):
- ANL/CSE/JA-65609; TRN: US201009%%713
- Journal Information:
- Electrochem. Solid State Lett., Vol. 13, Issue 2 ; 2010; ISSN 1099-0062
- Country of Publication:
- United States
- Language:
- ENGLISH
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