Li metal is the most ideal anode material to assemble rechargeable batteries with high energy density. However, nonuniform Li‐ion flux during repeated Li plating and stripping leads to continuous Li dendrite growth and dead Li formation, which causes safety risks and short lifetime and thus impedes the commercialization of Li metal batteries. Here, parallelly aligned holey nanosheets on a Li metal anode are reported to simultaneously redistribute the Li‐ion flux in the electrolyte and in the solid‐electrolyte interphase, which allows uniform Li‐ion distribution as well as fast Li‐ion diffusion for reversible Li plating and stripping. With holey MgO nanosheets as an example, the protected Li anodes achieve Coulombic efficiency of ≈99% and ultralong‐term reversible Li plating/stripping over 2500 h at a high current density of 10 mA cm⁻². A full‐cell battery, using the protected anode, a 4 V Li‐ion cathode, and a commercial carbonate electrolyte, shows capacity retention of 90.9% after 500 cycles.

中文翻译：

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通过平行排列的多孔纳米片重新排列锂离子通量，用于无枝晶的锂金属阳极。

锂金属是组装高能量密度可充电电池的最理想阳极材料。然而，在重复的锂电镀和剥离过程中，锂离子通量的不均匀会导致锂枝晶的连续生长和死锂的形成，这会导致安全隐患和使用寿命短，从而阻碍锂金属电池的商业化。在此，据报道，在锂金属阳极上平行排列的多孔纳米片可同时重新分布电解质和固体电解质中间相中的锂离子通量，从而可实现均匀的锂离子分布以及可逆锂的快速锂离子扩散电镀和剥离。以多孔MgO纳米片为例，受保护的Li阳极在2500 h内以10 mA cm的高电流密度实现了≈99％的库仑效率和超长期可逆Li镀/剥离⁻²。使用受保护阳极，4 V锂离子阴极和市售碳酸盐电解质的全电池，经过500次循环后，容量保持率达到90.9％。