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

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Lithium Atom Surface Diffusion and Delocalized Deposition Propelled by Atomic Metal Catalyst toward Ultrahigh-Capacity Dendrite-Free Lithium Anode
Nano Letters ( IF 9.6 ) Pub Date : 2022-08-26 , DOI: 10.1021/acs.nanolett.2c02611
Jian Wang _{1,

2} , Jing Zhang ₃ , Shaorong Duan ₄ , Lujie Jia ₁ , Qingbo Xiao ₅ , Haitao Liu ₆ , Huimin Hu ₁ , Shuang Cheng ₁ , Zhiyang Zhang ₅ , Linge Li ₁ , Wenhui Duan ₄ , Yuegang Zhang ₄ , Hongzhen Lin ₁

Affiliation

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 electrochemical 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 ∼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.

中文翻译：

原子金属催化剂对超高容量无枝晶锂负极的锂原子表面扩散和离域沉积

锂金属负极具有压倒性的容量和低电位，但容易发生枝晶生长和粉化，导致寿命短、利用率低。在这里，提出了使用单原子催化剂（SAC）活化剂促进锂原子扩散的基本新见解，以实现离域沉积。通过结合电子显微镜、飞行时间二次离子质谱、理论模拟和电化学分析，我们明确地描述了 SAC 作为动力学活化剂，推动锂原子的表面扩散和横向再分布，以实现无枝晶电镀形态。在令人印象深刻的 20 mA h cm ^{-2容量下，用 SAC 活化剂修饰的 Li 在 5 mA cm}^-2下表现出约 50 mV 的低过电势，900 小时的长寿命，以及 150 次循环期间的高库仑效率，远优于大多数文献报道。如此耦合的锂硫全电池提供高循环和倍率性能，显示出对下一代锂金属电池的巨大希望。

更新日期：2022-08-26

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