Li anodes have been rapidly developed in recent years owing to the rising demand for higher‐energy‐density batteries. However, the safety issues induced by dendrites hinder the practical applications of Li anodes. Here, Li metal anodes stabilized by regulating lithium plating/stripping in vertically aligned microchannels are reported. The current density distribution and morphology evolution of the Li deposits on porous Cu current collectors are systematically analyzed. Based on simulations in COMSOL Multiphysics, the tip effect leads to preferential deposition on the microchannel walls, thus taking full advantage of the lightening rod theory of classical electromagnetism for restraining growth of Li dendrites. The Li anode with a porous Cu current collector achieves an enhanced cycle stability and a higher average Coulombic efficiency of 98.5% within 200 cycles. In addition, the resultant LiFePO₄/Li full battery demonstrates excellent rate capability and stable cycling performance, thus demonstrating promise as a current collector for high‐energy‐density, safe rechargeable Li batteries.

中文翻译：

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通过调节垂直排列的微通道中的锂电镀/剥离来稳定锂金属阳极

近年来，由于对高能量密度电池的需求不断增长，锂阳极得到了快速发展。然而，由树枝状晶体引起的安全问题阻碍了锂阳极的实际应用。在此，报道了通过调节垂直排列的微通道中的锂电镀/剥离而稳定的锂金属阳极。系统分析了多孔Cu集电器上Li沉积物的电流密度分布和形貌演变。基于COMSOL Multiphysics中的模拟，尖端效应导致微通道壁上的优先沉积，因此充分利用了经典电磁避雷针理论来抑制Li树突的生长。具有多孔Cu集电器的Li阳极具有增强的循环稳定性和98的更高平均库仑效率。200个周期内达到5％。此外，生成的LiFePO₄ / Li满电池展示出出色的速率能力和稳定的循环性能，因此证明了作为高能量密度，安全可充电锂电池集电器的前景。