Lithium-oxygen (Li-O2) batteries can potentially transform energy storage and transportation with a several-fold increase in energy density over the state-of-the-art Li-ion batteries. The development of rechargeable Li-O2 batteries faces substantial challenges, such as severe electrolyte instability against the highly reactive oxygen species, including superoxide, peroxide, and singlet oxygen, generated during Li-O2 battery operation. To date, the vast majority of studies in this field have been based on electrolytes derived from a small set of well-studied, commercially available components (e.g., solvents such as tetraglyme and DMSO and salts such as lithium bis(trifluoromethane)sulfonimide [LiTFSI]). Although great progress has been made through optimization of such formulations, the use of physical organic chemistry principles to rationally design new molecular components may enable the discovery of electrolytes with stability profiles that cannot be achieved with existing formulations.
Bibliographical noteFunding Information:
The authors would like to thank the Samsung Advanced Institute of Technology for funding this research, Dr. Moungi Bawendi for his support in the photoluminescence spectroscopy experiment, and Graham Leverick for his assistance in the pressure-tracking and DEMS experiments. S.F. gratefully acknowledges the Link Foundation for an energy fellowship. J.R.L. gratefully acknowledges the National Institutes of Health for a postdoctoral fellowship ( 1F32GM126913-01A1 ). C.F.P. was supported by a National Science Foundation (NSF) graduate research fellowship under grant no. 1122374 and by the Center for Excitonics , an Energy Frontier Research Center funded by the US Department of Energy (DOE) Office of Science Basic Energy Sciences Program under award no. DE-SC0001088 (Massachusetts Institute of Technology). This research used resources of the National Energy Research Scientific Computing Center , a DOE Office of Science User Facility supported under contract no. DE-AC02-5CH11231, and the Extreme Science and Engineering Discovery Environment, which is supported by NSF grant no. ACI-1548562 .
- (electro)chemical stability
- Li-O batteries
- SDG7: Affordable and clean energy
- electrolyte design
- singlet oxygen