Lithium difluoro(oxalato)borate as additive to Improve the thermal stability of llithiated graphite.
The reaction of lithiated graphite with a nonaqueous electrolyte of 1.2 M LiPF{sub 6} in ethylene carbonate/ethyl methyl carbonate (3:7 by weight) was investigated using differential scanning calorimetry. The decomposition of the solid electrolyte interphase (SEI) took place at about 100 C and was followed by a continuous formation/decomposition of the SEI up to 250 C. Another two peaks were observed at temperatures above 250 C. These peaks were attributed to the major reaction of lithiated graphite with the nonaqueous electrolyte. With the addition of lithium difluoro(oxalato)borate as an electrolyte additive, the onset temperatures of the three peaks were pushed higher, as confirmed by the activation energies obtained.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- EE
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 1004033
- Report Number(s):
- ANL/CSE/JA-63178; TRN: US201103%%279
- Journal Information:
- Electrochem. Solid State Lett., Vol. 12, Issue 4 ; Jan. 21, 2009
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
A Localized High-Concentration Electrolyte with Optimized Solvents and Lithium Difluoro(oxalate)borate Additive for Stable Lithium Metal Batteries
Eeffect of electrolyte composition on initial cycling and impedance characteristics of lithium-ion-cells.