Advanced High-Voltage Aqueous Lithium-Ion Battery Enabled by “Water-in-Bisalt” Electrolyte
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- 作者：Dr. Liumin Suo ; Dr. Oleg Borodin ; Wei Sun ; Dr. Xiulin Fan ; Dr. Chongyin Yang ; Dr. Fei Wang ; Tao Gao ; Dr. Zhaohui Ma ; Dr. Marshall Schroeder ; Dr. Arthur von Cresce ; Dr. Selena M. Russell ; Prof. Michel Armand ; Prof. Austen Angell ; Dr. Kang Xu and Prof. Chunsheng Wang
- 刊名：Angewandte Chemie International Edition
- 出版年：2016
- 出版时间：June 13, 2016
- 年：2016
- 卷：55
- 期：25
- 页码：7136-7141
- 全文大小：4867K
- ISSN：1521-3773
文摘
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 TiO2 as the anode material, and a 2.5 V aqueous Li-ion cell based on LiMn2O4 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.