Li metal anodes as one of promising anodes in next-generation batteries, face the challenges from infinite volume change and high reactivity to electrolytes that easily leads to unstable Li/electrolyte interface and unique dendrite growth of Li. Although mechanical pressure can effectively inhibit the dendrite growth of Li, it also increases the risk of short circuits, because Li metal easily grows into the separator under pressure. Here, an interface layer is introduced on Li metal to block this growth, using Li₃P/LiCl as a model. Meanwhile, the dense and robust layer also reduce the side reactions between Li and electrolytes. With the helps from mechanical pressure and interface layer, this design exhibits the improved electrochemical performances, much better than that without pressure or without the layer. The full cells of Li₃P/LiCl-coated Li//LiFePO₄, show a capacity of 1.69 mAh cm^-2 after 1000 cycles under pressure at 3.9 mA cm^-2 with a capacity retention of 99.5% in carbonates. The results indicate the promising potential for the pressure effect to be used for advanced Li metal anodes.

锂金属阳极作为下一代电池中极有希望的阳极之一，面临着无限的体积变化和对电解质的高反应性等挑战，这些挑战很容易导致不稳定的Li /电解质界面和独特的Li树枝状生长。尽管机械压力可以有效地抑制Li的树枝状晶体生长，但由于Li金属在压力下很容易长成隔膜，因此也增加了短路的风险。在这里，使用Li ₃在锂金属上引入界面层以阻止这种生长以P / LiCl为模型。同时，致密而坚固的层还减少了锂与电解质之间的副反应。在机械压力和界面层的帮助下，这种设计具有改进的电化学性能，比没有压力或没有压力层的电化学性能要好得多。Li ₃ P / LiCl涂覆的Li // LiFePO ₄的全电池在3.9 mA cm ^-2的压力下经过1000次循环后显示1.69 mAh cm ^-2的容量，在碳酸盐中的容量保持率为99.5％。结果表明，用于先进的锂金属阳极的压力效应潜力很大。