High reversible Li plating and stripping by in-situ construction a multifunctional lithium-pinned array

Pan Xu, Xiaodong Lin, Xinyu Hu, Xueyang Cui, Xiaoxiang Fan, Cui Sun, Xiaoming Xu, Jeng Kuei Chang, Jingmin Fan, Ruming Yuan, Bingwei Mao, Quanfeng Dong, Mingsen Zheng*

*此作品的通信作者

研究成果: Article同行評審

36 引文 斯高帕斯(Scopus)

摘要

Lithium metal is the most promising anode candidate because of its ultrahigh theoretical specific capacity. Unfortunately, its high reactivity, uncontrolled dendrites, “dead lithium” formation, and infinite volume expansion hinder its commercial application. Herein, by in-situ constructing a multifunctional lithium-pinned array (m-LPA) endowed with functions of lithiophilicity, zoning effect and riveting effect on a surfacely phosphorized three-dimensional (3D) copper foam, a high reversible Li plating/stripping electrochemistry can be achieved. Benefiting from the m-LPA, lithium can uniformly plate/strip both on the surface and in the inner space of the 3D skeletons with improved morphology. Consequently, a high Coulombic efficiency (~98.41%) could be achieved at 1 ​mA ​cm−2 with 1 ​mA ​h cm−2 for over 600 cycles (1200 ​h). Moreover, at a higher current density of 10 ​mA ​cm−2 with 0.5 ​mA ​h cm−2, a symmetric cell with m-LPA@Li electrode could still stably cycle for 900 cycles. Finally, a full cell coupled with LiFePO4 cathode displayed excellent rate performance with a lower overpotential. The conception and strategy of m-LPA, which were first proposed here, are a promising way to realize large-scale application of Li anode.

原文English
頁(從 - 到)188-195
頁數8
期刊Energy Storage Materials
28
DOIs
出版狀態Published - 6月 2020

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