1. Advanced High-Voltage Aqueous Lithium-Ion Battery Enabled by 'Water-in-Bisalt' Electrolyte.
- Author
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Suo, Liumin, Borodin, Oleg, Sun, Wei, Fan, Xiulin, Yang, Chongyin, Wang, Fei, Gao, Tao, Ma, Zhaohui, Schroeder, Marshall, von Cresce, Arthur, Russell, Selena M., Armand, Michel, Angell, Austen, Xu, Kang, and Wang, Chunsheng
- Subjects
LITHIUM-ion batteries ,ELECTROLYTES ,ANODES ,CATHODES ,TITANIUM oxides - Abstract
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 TiO
2 as the anode material, and a 2.5 V aqueous Li-ion cell based on LiMn2 O4 and carbon-coated TiO2 delivered the unprecedented energy density of 100 Wh kg−1 for 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. [ABSTRACT FROM AUTHOR]- Published
- 2016
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