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Operando Visualization of Morphological Evolution in Mg Metal Anode: Insight into Dendrite Suppression for Stable Mg Metal Batteries

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Title
Operando Visualization of Morphological Evolution in Mg Metal Anode: Insight into Dendrite Suppression for Stable Mg Metal Batteries
Author(s)
Kwak, Jin Hwan; Yunseo Jeoun; Oh, Si Hyoung; Yu, Seungho; Lim, Jae-Hong; Yung-Eun Sung; Yu, Seung-Ho; Lim, Hee-Dae
Publication Date
2022-01
Journal
ACS Energy Letters, v.7, no.1, pp.162 - 170
Publisher
American Chemical Society
Abstract
© Rechargeable Mg-metal batteries (RMBs) are considered promising alternatives to conventional Li-ion batteries owing to their high volumetric capacity and low cost. In addition, Mg anodes for RMBs do not suffer from metal dendritic growth or internal short circuit. However, the notion that Mg anodes are indeed dendrite-free has recently been under debate, and further clarification is crucial for advancing practical RMBs. In this work, we closely investigated Mg dendrite behaviors under various electrochemical test conditions using operando observation techniques. The critical current density inducing fatal Mg dendritic growth was defined by directly monitoring the dendritic growth process leading to a short circuit. We further propose a new strategy to regulate the dendrite growth by introducing magnesiophilic sites of Au nanoseeds on a substrate. We not only elucidated the effect of the applied current density and capacity utilization on the Mg growth behaviors but also demonstrated the effect of magnesiophilic seeds in suppressing Mg dendrite growth.
URI
https://pr.ibs.re.kr/handle/8788114/12070
DOI
10.1021/acsenergylett.1c02486
ISSN
2380-8195
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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