阳极
法拉第效率
材料科学
合金
集电器
成核
化学工程
金属
沉积(地质)
剥离(纤维)
电镀(地质)
锌
箔法
冶金
纳米技术
电解质
化学
电极
复合材料
有机化学
古生物学
地球物理学
物理化学
工程类
地质学
生物
沉积物
作者
Congyin Liu,Yangyang Xie,Huangxu Li,Jingyu Xu,Zhian Zhang
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2022-08-01
卷期号:169 (8): 080521-080521
被引量:20
标识
DOI:10.1149/1945-7111/ac8a1c
摘要
The sodium (Na) metal anode is a desirable anode for the next-generation batteries because of its abundant resources and the high specific capacity. However, the poor cyclic stability hinders its practical application. In this study, we report a facile strategy of in situ constructing sodiophilic alloying sites for Na metal anodes by using zinc (Zn) foil as the current collector, which enables smooth and compact deposition morphology and excellent cyclic stability. The Zn current collector and the initial deposited Na generate a NaZn 13 alloy interface, which can guide the subsequent plating/stripping behavior of Na. As a result, the Na metal anode with Zn current collector exhibits ultrahigh stability with Coulombic efficiency of 99.87% (over 450 cycles at 1 mA cm −2 for 1 mAh cm −2 ). Furthermore, the impressive capacity retention (98.5% after 40 cycles at 0.5 C) in Zn∣∣NVP (Na 3 V 2 (PO 4 ) 3 ) batteries suggests the anticipated application prospect of Zn current collector in anode-free Na metal batteries, which opens up a new way for the evolution of the next generation of safe and efficient Na metal anodes.
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