“Water-in-salt” electrolyte enables high-voltage aqueous lithium-ion chemistries

@article{Suo2015WaterinsaltEE,
  title={“Water-in-salt” electrolyte enables high-voltage aqueous lithium-ion chemistries},
  author={Liumin Suo and Oleg Borodin and Tao Gao and Marco Olguin and Janet S. Ho and Xiulin Fan and Chao Luo and Chunsheng Wang and Kang Xu},
  journal={Science},
  year={2015},
  volume={350},
  pages={938 - 943}
}
A concentrated effort for battery safety Aqueous electrolytes are limited to run below 1.23 V to avoid degradation. Suo et al. smash through this limit with an aqueous salt solution containing lithium (Li) bis(trifluoromethane sulfonyl)imide to create an electrolyte that has an electrochemical window of 3 V (see the Perspective by Smith and Dunn). They used extremely high-concentration solutions, which suppressed hydrogen evolution and electrode oxidation. At these concentrations, the Li… 

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