Aqueous Li-ion battery enabled by halogen conversion–intercalation chemistry in graphite

@article{Yang2019AqueousLB,
  title={Aqueous Li-ion battery enabled by halogen conversion–intercalation chemistry in graphite},
  author={Chongyin Yang and Ji Chen and Xiao Ji and Travis P. Pollard and Xujie L{\"u} and Cheng-Jun Sun and Singyuk Hou and Qi Liu and Cunming Liu and Tingting Qing and Yingqi Wang and Oleg Borodin and Yang Ren and Kang Xu and Chunsheng Wang},
  journal={Nature},
  year={2019},
  volume={569},
  pages={245-250}
}
The use of ‘water-in-salt’ electrolytes has considerably expanded the electrochemical window of aqueous lithium-ion batteries to 3 to 4 volts, making it possible to couple high-voltage cathodes with low-potential graphite anodes1–4. However, the limited lithium intercalation capacities (less than 200 milliampere-hours per gram) of typical transition-metal-oxide cathodes5,6 preclude higher energy densities. Partial7,8 or exclusive9 anionic redox reactions may achieve higher capacity, but at the… Expand
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