阳极
枝晶(数学)
锌
材料科学
化学工程
扩散
图层(电子)
相间
剥离(纤维)
电镀(地质)
电解质
电化学
电偶阳极
电极
纳米技术
金属
化学
冶金
复合材料
阴极保护
物理
物理化学
工程类
地质学
几何学
热力学
生物
遗传学
数学
地球物理学
作者
Jin Han,Holger Euchner,Matthias Kuenzel,Seyed Milad Hosseini,Axel Groß,Alberto Varzi,Stefano Passerini
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2021-08-12
卷期号:6 (9): 3063-3071
被引量:135
标识
DOI:10.1021/acsenergylett.1c01249
摘要
Zn batteries have recently become of great interest as energy storage devices. However, their lifespan is limited by irreversible processes at the Zn anodes owing to side reactions and dendrite growth in a mild pH electrolyte. Herein, an artificial ZnF2 layer on the Zn metal anode surface is developed to address these issues. Modeling results suggest that ZnF2 can allow insertion of Zn2+ and offers diffusion channels for the transport to/from the Zn anode via an interstitial diffusion mechanism. The artificial layer suppresses dendrite growth by guiding the Zn plating/stripping underneath the layer, thus enhancing the electrochemical performance of the anode as demonstrated by the Zn-ZnF2/MnO2 full cell. The Zn anode with this artificial layer sustains long-term cycling (more than 700 h) at an areal capacity of 0.5 mAh cm–2, and the Zn-ZnF2/MnO2 full cells achieve a capacity retention of 89% after 3000 cycles.
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