Dendrite‐induced short circuit and capacity loss present major barriers to high‐energy‐density lithium (Li) metal batteries. Many approaches have been proposed to regulate or restrain the formation of Li dendrite, yet it has not been fully eliminated. Herein, a dredging tactic with hemisphere‐like concaves is designed to horizontally release the stress during Li deposition, making both upper smooth Li and nether granular Li dwell inside the compartmented tummy. With such protuberance‐free Li metal anode, an ultrahigh Coulombic efficiency over 96% of the half‐cell is maintained after 490 cycles and capacity retention of 100% for the full cell paired with a LiFePO₄ cathode after 140 cycles (with low N/P ratio of ≈5) is achieved simultaneously. This study contributes to a deeper comprehension of electrochemical metal deposition and promotes the development of safe batteries.

中文翻译：

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无突起锂金属阳极的水平应力释放

枝晶引起的短路和容量损失是高能量密度锂（Li）金属电池的主要障碍。已经提出了许多方法来调节或限制锂枝晶的形成，但是尚未完全消除。在此，采用具有半球形凹面的疏t策略，旨在在Li沉积过程中水平释放应力，从而使上部光滑的Li和下方的粒状Li都留在分隔的腹部内部。使用这种无突起的Li金属阳极，在490次循环后，半电池的库仑效率保持在96％以上，而与LiFePO ₄配对的全电池的容量保持率为100％140个循环（低的N / P比≈5）后同时获得阴极。这项研究有助于更深入地理解电化学金属沉积，并促进安全电池的发展。