Uncontrollable dendrite growth hinders the direct use of a lithium metal anode in batteries, even though it has the highest energy density of all anode materials. Achieving uniform lithium deposition is the key to solving this problem, but it is hard to be realized on a planar electrode surface. In this study, a thin lithiophilic layer consisting of vertically aligned CuO nanosheets directly grown on a planar Cu current collector is prepared by a simple wet chemical reaction. The lithiophilic nature of the CuO nanosheets reduces the polarization of the electrode, ensuring uniform Li nucleation and continuous smooth Li plating, which is difficult to realize on the normally used lithiophobic Cu current collector surface. The integration of the grown CuO arrays and the Cu current collector guarantees good electron transfer, and moreover, the vertically aligned channels between the CuO nanosheets guarantee fast ion diffusion and reduce the local current density. As a result, a high Columbic efficiency of 94% for 180 cycles at a current density of 1 mA cm⁻² and a prolonged lifespan of a symmetrical cell (700 h at 0.5 mA cm⁻²) can be easily achieved, showing a simple but effective way to realize Li metal‐based anode stabilization.

中文翻译：

---

在铜收集器上垂直排列的亲硫性CuO纳米片可稳定锂金属电池的锂沉积

不可控制的枝晶生长阻碍了锂金属阳极在电池中的直接使用，即使它具有所有阳极材料中最高的能量密度。实现均匀的锂沉积是解决该问题的关键，但是很难在平坦的电极表面上实现。在这项研究中，通过简单的湿式化学反应制备了由直接排列在平面Cu集电器上的垂直排列的CuO纳米片组成的疏脂硫薄层。CuO纳米片的亲锂性质降低了电极的极化，确保了均匀的Li成核和连续的平滑Li镀层，这在通常使用的疏硫Cu集电器表面上很难实现。生长的CuO阵列和Cu集电器的集成保证了良好的电子传输，此外，CuO纳米片之间的垂直排列通道可确保快速的离子扩散并降低局部电流密度。结果，在1 mA cm的电流密度下，在180个循环中94％的高哥伦比亚效率可以很容易地实现⁻²并延长对称电池的寿命（在0.5 mA cm ^-2时为700 h ），这显示了实现Li金属基阳极稳定的一种简单而有效的方法。