Lithium Atom Surface Diffusion and Delocalized Deposition Propelled by Atomic Metal Catalyst toward Ultrahigh-Capacity Dendrite-Free Lithium Anode.
Lithium Atom Surface Diffusion and Delocalized Deposition Propelled by Atomic Metal Catalyst toward Ultrahigh-Capacity Dendrite-Free Lithium Anode.
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DOI：
10.1021/acs.nanolett.2c02611
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发表时间：
2022-08
期刊：
影响因子：
10.8
通讯作者：
J. Wang;Jing Zhang;Shaorong Duan;Lujie Jia;Qingbo Xiao;Haitao Liu;Huimin Hu;Shuang Cheng;Zhiyang Zhang;Linge Li;Wenhui Duan;Yuegang Zhang;Hongzhen Lin
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文献类型：
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作者：
J. Wang;Jing Zhang;Shaorong Duan;Lujie Jia;Qingbo Xiao;Haitao Liu;Huimin Hu;Shuang Cheng;Zhiyang Zhang;Linge Li;Wenhui Duan;Yuegang Zhang;Hongzhen Lin
锂金属阳极容量大、电位低，但易发生枝晶生长和粉化，寿命短、利用率低。在这里，提出了一个基本的新的见解，使用单原子催化剂（SAC）激活剂，以促进锂原子扩散，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，我们已经明确地描绘了SAC作为动力学活化剂，在推动锂原子的表面扩散和横向再分布，实现无枝晶电镀形态。在20 mA·h·cm-2的容量下，经SAC活化剂修饰的Li在5 mA·cm-2时的过电位为1.50 mV，使用寿命为900 h，循环150次后的库仑效率高于文献报道。如此耦合的锂硫全电池提供了高循环和倍率性能，显示了下一代锂金属电池的巨大前景。
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.