Combining ionic liquid-based electrolytes and nanostructured anatase TiO2 anodes for intrinsically safer sodium-ion batteries
Combining ionic liquid-based electrolytes and nanostructured anatase TiO2 anodes for intrinsically safer sodium-ion batteries
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DOI：
10.1016/j.electacta.2016.03.124
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发表时间：
2016-06-10
影响因子：
6.6
通讯作者：
Bresser, Dominic
中科院分区：
文献类型：
--
作者：
Wu, Liming;Moretti, Arianna;Bresser, Dominic
为了实现具有增强的安全性的钠离子电池，我们在本文中报道了利用离子液体（IL）基电解质来循环纳米颗粒TiO 2作为钠离子阳极材料。IL基电解质的使用导致了TiO 2基电极的高度稳定的循环性能，当施加33.5mA g（1）的比电流时提供了159 mAh g（1）的初始比容量，并且在80次完全（放电）充电循环后仍为155 mAh g（1）.此外，一个非常有前途的率性能得到与特定的容量为108和78毫安时g-1的特定电流为335和670毫安g（1），分别。实际上，优异的电化学性能和高库仑效率以及电化学阻抗谱结果表明IL基电解质对稳定的固体电解质中间相（SEI）的形成的高度有益的影响。(C)2016爱思唯尔有限公司版权所有。
In an attempt to realize sodium-ion batteries with enhanced safety, we report herein the utilization of ionic liquid (IL)-based electrolytes for cycling nanoparticulate anatase TiO2 as sodium-ion anode material. The use of the IL -based electrolyte results in the highly stable cycling performance of anatase TiO2-based electrodes, providing an initial specific capacity of 159 mAh g (1) when applying a specific current of 33.5 mA g (1), and still 155 mAh g (1) after 80 full (dis-)charge cycles. Moreover, a very promising rate performance is obtained with specific capacities of 108 and 78 mAh g 1 for specific currents of 335 and 670 mA g (1), respectively. Indeed, the excellent electrochemical performance, and high coulombic efficiency, as well as the electrochemical impedance spectroscopy results indicate the highly beneficial impact of the IL-based electrolyte on the formation of a stabilized solid electrolyte interphase (SEI). (C) 2016 Elsevier Ltd. All rights reserved.