期刊
NANO LETTERS
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c02611
关键词
lithium metal battery; single atomic catalyst; surface atom diffusion; dendrite-free lithium plating; surface activator
类别
资金
- Alexander von Humboldt Foundation
- National Key R&D Program of China [2021YFA1201503]
- Natural Science Foundation of Jiangsu Province [BK 20210130]
- National Natural Science Foundation of China [21972164, 22078136, 21773294, 11734013]
- Innovative and Entrepreneurial Doctor in Jiangsu Province [JSSCBS20211428]
- Shaanxi Natural Science Basic Research Plan [2022JQ-137]
By using single-atomic catalyst (SAC) activators, the dendrite growth and pulverization issues in lithium metal anodes can be resolved. SAC activators promote the surface spreading and lateral redistribution of lithium atoms, leading to dendrite-free plating morphology and improved lifespan and cycling performance of lithium metal batteries.
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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