Dendrite‐Free Lithium Anodes with Ultra‐Deep Stripping and Plating Properties Based on Vertically Oriented Lithium–Copper–Lithium Arrays,Advanced Materials

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Dendrite‐Free Lithium Anodes with Ultra‐Deep Stripping and Plating Properties Based on Vertically Oriented Lithium–Copper–Lithium Arrays
Advanced Materials ( IF 27.4 ) Pub Date : 2019-05-30 , DOI: 10.1002/adma.201901310
Zhenjiang Cao ₁ , Bin Li ₁ , Shubin Yang ₁

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Although lithium metal is the best anode for lithium‐based batteries, the uncontrollable lithium dendrites especially under deep stripping and plating states hamper its practical applications. Here, a dendrite‐free lithium anode is developed based on vertically oriented lithium–copper–lithium arrays, which can be facilely produced via traditional rolling or repeated stacking approaches. Such vertically oriented arrays not only enable both the lithium‐ion flux and the electric field to be regulated, but also can act as a “dam” to guide the regular plating of lithium, thus efficiently buffering the volume change of the lithium anode upon cycling. As a consequence, the vertically oriented anode exhibits an excellent deep stripping and plating capability upto 50 mAh cm⁻², high rate capabilities (20 mA cm⁻²), and long cycle life (2000 h). Based on this anode, a full lithium battery with a LiCoO₂ cathode delivers a good cycle life, holding great potential for practical lithium‐metal batteries with high energy densities.

中文翻译：

具有垂直取向的锂铜锂阵列的超深剥离和镀覆特性的无树突状锂阳极

尽管锂金属是锂基电池的最佳阳极，但不可控制的锂枝晶尤其是在深度剥离和镀覆状态下阻碍了其实际应用。在这里，基于垂直取向的锂-铜-锂阵列开发了无枝晶锂阳极，可以通过传统的轧制或重复堆叠方法轻松生产。这种垂直排列的阵列不仅可以调节锂离子通量和电场，而且可以充当“坝”以引导锂的常规镀覆，从而有效地缓冲了循环时锂阳极的体积变化。结果，垂直取向的阳极在高达50 mAh cm ^{-2的条件下}具有出色的深度剥离和镀覆能力，高倍率能力（20 mA cm^-2），循环寿命长（2000 h）。基于该阳极，带有LiCoO ₂阴极的完整锂电池可提供良好的循环寿命，为具有高能量密度的实用锂金属电池具有巨大的潜力。

更新日期：2019-05-30

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