Lithium Atom Surface Diffusion and Delocalized Deposition Propelled by Atomic Metal Catalyst toward Ultrahigh-Capacity Dendrite-Free Lithium Anode

文献类型： 外文期刊

第一作者： Wang, Jian

作者： Wang, Jian;Hu, Huimin;Cheng, Shuang;Li, Linge;Lin, Hongzhen;Wang, Jian;Hu, Huimin;Cheng, Shuang;Li, Linge;Lin, Hongzhen;Wang, Jian;Zhang, Jing;Xiao, Qingbo;Zhang, Zhiyang;Liu, Haitao;Duan, Wenhui;Zhang, Yuegang

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关键词： lithium metal battery; single atomic catalyst; surface atom diffusion; dendrite-free lithium plating; surface activator

期刊名称：NANO LETTERS （ 影响因子：12.262； 五年影响因子：12.709 ）

ISSN： 1530-6984

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收录情况： SCI

摘要： Lithium metal anode possesses overwhelming capacity and low potential but suffers from dendrite growth and pulverization, causing short lifespan and low utilization. Here, a fundamental novel insight of using single-atomic catalyst (SAC) activators to boost lithium atom diffusion is proposed to realize delocalized deposition. By combining electronic microscopies, time-of -flight secondary ion mass spectrometry, theoretical simulations, and electro-chemical analyses, we have unambiguously depicted that the SACs serve as kinetic activators in propelling the surface spreading and lateral redistribution of the lithium atoms for achieving dendrite-free plating morphology. Under the impressive capacity of 20 mA h cm-2, the Li modified with SAC-activator exhibits a low overpotential of & SIM;50 mV at 5 mA cm-2, a long lifespan of 900 h, and high Coulombic efficiencies during 150 cycles, much better than most literature reports. The so-coupled lithium-sulfur full battery delivers high cycling and rate performances, showing great promise toward the next-generation lithium metal batteries.

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