Advanced High-Voltage Aqueous Lithium-Ion Battery Enabled by “Water-in-Bisalt” Electrolyte

Liumin Suo, Oleg Borodin, Wei Sun, Xiulin Fan, Chongyin Yang, Fei Wang, Tao Gao, Zhaohui Ma, Marshall Schroeder, Arthur von Cresce, Selena M. Russell, Michel Armand, Charles Angell, Kang Xu, Chunsheng Wang

Research output: Contribution to journalArticlepeer-review

540 Scopus citations


A new super-concentrated aqueous electrolyte is proposed by introducing a second lithium salt. The resultant ultra-high concentration of 28 m led to more effective formation of a protective interphase on the anode along with further suppression of water activities at both anode and cathode surfaces. The improved electrochemical stability allows the use of TiO2as the anode material, and a 2.5 V aqueous Li-ion cell based on LiMn2O4and carbon-coated TiO2delivered the unprecedented energy density of 100 Wh kg−1for rechargeable aqueous Li-ion cells, along with excellent cycling stability and high coulombic efficiency. It has been demonstrated that the introduction of a second salts into the “water-in-salt” electrolyte further pushed the energy densities of aqueous Li-ion cells closer to those of the state-of-the-art Li-ion batteries.

Original languageEnglish (US)
Pages (from-to)7136-7141
Number of pages6
JournalAngewandte Chemie - International Edition
Issue number25
StatePublished - Jun 13 2016


  • anatase TiO
  • aqueous batteries
  • electrolyte
  • lithium-ion batteries
  • water-in-bisalt

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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