It is considered that anode-free Li-metal batteries are one of the promising constructions for achieving extremely high energy density, but they still suffer from low Coulombic efficiency, rapid capacity fading and dendrite growth issues. Here, we demonstrate an anode-free full cell with Li₂S as cathode and Au-modified Cu foil as the vacant anodic current collector for achieving a very high energy density up to 626 ​Wh kg⁻¹. The Au-modification (0.168 ​mg ​cm⁻², $ ~0.008 ​cm⁻²) will transform to Li_xAu alloy and solid solution, which can successfully lower the nucleation barrier of Li deposition and induce the dendrite-free Li morphology. As a result, the anode-free Li₂S||Au/Cu full cell exhibits a greatly improved initial Coulombic efficiency of 69% and a stable cyclability over 150 cycles. Our work provides a new route to realize the truly Li-limited Li–S full batteries with much higher overall energy density and greatly stabilized interfacial chemistry.

人们认为，无阳极锂金属​​电池是实现极高能量密度的有前途的构造之一，但它们仍然遭受库仑效率低，容量快速衰减和枝晶生长问题的困扰。在这里，我们演示了一个无阳极的全电池，其中Li ₂ S为阴极，Au改性的Cu箔为空阳极集电器，可实现高达626 Wh kg ^-1的非常高的能量密度。Au修饰（0.168 mg·cm ^-2，$〜0.008 cm ^-2）将转变为Li _x Au合金和固溶体，可成功降低Li沉积的成核势垒并诱导无枝晶的Li形态。结果，无阳极的Li ₂S || Au / Cu全电池在150个循环中显示出69％的初始库仑效率大大提高，并且循环能力稳定。我们的工作提供了一条新途径，以实现更高的整体能量密度和大大稳定的界面化学，真正实现锂受限的Li-S全电池。