电解质
离子液体
电化学窗口
离子电导率
钠
电化学
材料科学
锂(药物)
无机化学
化学工程
化学
电极
有机化学
冶金
物理化学
医学
工程类
内分泌学
催化作用
作者
Alexander Mirandona-Olaeta,Eider Goikolea,S. Lanceros‐Méndez,Arkaitz Fidalgo‐Marijuan,Idoia Ruiz de Larramendi
出处
期刊:Batteries
[MDPI AG]
日期:2023-12-12
卷期号:9 (12): 588-588
被引量:2
标识
DOI:10.3390/batteries9120588
摘要
Sodium batteries are receiving increasing interest as an alternative to reduce dependence on lithium-based systems. Furthermore, the development of solid-state electrolytes will lead to higher-performing and safer devices. In this work, a Zn-based metal–organic framework (Zn-MOF-74) is combined as a physical barrier against the growth of dendrites, together with 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIm][TFSI]) ionic liquid, which provides improved mobility to sodium ions. It is demonstrated that the incorporation of the appropriate amount of ionic liquid within the pores of the MOF produces a considerable increase in ionic conductivity, achieving values as high as 5 × 10−4 S cm−1 at room temperature, in addition to an acceptable Na+ transference number. Furthermore, the developed Na[EMIm][TFSI]@Zn-MOF-74 hybrid solid electrolyte contributes to stable and dendrite-free sodium plating/stripping for more than 100 h. Finally, a more than notable extension of the electrochemical stability window of the electrolyte has been determined, being useful even above 7 V vs. Na+/Na. Overall, this work presents a suitable strategy for the next generation of solid-state sodium batteries.
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