Kwak, Jin Hwan Jeoun, Yunseo Oh, Si Hyoung Yu, Seungho Lim, Jae-Hong Sung, Yung-Eun Yu, Seung-Ho Lim, Hee-Dae 2024-01-19T13:02:44Z 2024-01-19T13:02:44Z 2022-01-10 2022-01 2380-8195 https://pubs.kist.re.kr/handle/201004/115914 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. English American Chemical Society Operando Visualization of Morphological Evolution in Mg Metal Anode: Insight into Dendrite Suppression for Stable Mg Metal Batteries Article 10.1021/acsenergylett.1c02486 1 ACS Energy Letters, v.7, no.1, pp.162 - 170 ACS Energy Letters 7 1 162 170 N scie scopus 000730355200001 2-s2.0-85121134322 Chemistry, Physical Electrochemistry Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article DEPOSITION RECHARGEABLE BATTERIES ELECTROLYTE-SOLUTIONS LITHIUM GROWTH