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首页> 外文期刊>Advanced energy materials >Enhanced Stability of Li Metal Anodes by Synergetic Control of Nucleation and the Solid Electrolyte Interphase
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Enhanced Stability of Li Metal Anodes by Synergetic Control of Nucleation and the Solid Electrolyte Interphase

机译：通过成核和固体电解质相间的协同控制提高锂金属阳极的稳定性

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摘要

Use of a protective coating on a lithium metal anode (LMA) is an effective approach to enhance its coulombic efficiency and cycling stability. Here, a facile approach to produce uniform silver nanoparticle-decorated LMA for high-performance Li metal batteries (LMBs) is reported. This effective treatment can lead to well-controlled nucleation and the formation of a stable solid electrolyte interphase (SEI). Ag nanoparticles embedded in the surface of Li anodes induce uniform Li plating/stripping morphologies with reduced overpotential. More importantly, cross-linked lithium fluoride-rich interphase formed during Ag+ reduction enables a highly stable SEI layer. Based on the Ag-LiF decorated anodes, LMBs with LiNi1/3Mn1/3Co1/3O2 cathode (approximate to 1.8 mAh cm(-2)) can retain >80% capacity over 500 cycles. The similar approach can also be used to treat sodium metal anodes. Excellent stability (80% capacity retention in 10 000 cycles) is obtained for a Na||Na3V2(PO4)(3) full cell using a Na-Ag-NaF/Na anode cycled in carbonate electrolyte. These results clearly indicate that synergetic control of the nucleation and SEI is an efficient approach to stabilize rechargeable metal batteries.
机译：在锂金属阳极（LMA）上使用保护涂层是提高其库仑效率和循环稳定性的有效方法。在此，报道了一种用于为高性能锂金属电池（LMB）生产均匀银纳米粒子修饰的LMA的简便方法。这种有效的处理可以导致成核得到很好的控制，并形成稳定的固体电解质中间相（SEI）。嵌入Li阳极表面的Ag纳米粒子可诱导均匀的Li镀层/剥落形貌，并降低过电势。更重要的是，在Ag +还原过程中形成的交联的富含氟化锂的中间相可实现高度稳定的SEI层。基于Ag-LiF装饰的阳极，具有LiNi1 / 3Mn1 / 3Co1 / 3O2阴极（约1.8 mAh cm（-2））的LMB可以在500个循环中保持> 80％的容量。类似的方法也可以用于处理钠金属阳极。使用碳酸盐电解质中循环的Na-Ag-NaF / Na阳极，对于Na || Na3V2（PO4）（3）充满电的电池，具有出色的稳定性（10000次循环中80％的容量保持率）。这些结果清楚地表明，成核和SEI的协同控制是稳定可充电金属电池的有效方法。

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