Effect of Liquid Metal Coating on Improved Cycle Performance of Anode-Free Lithium Metal Battery

Although Li-ion battery is one of the most widely used energy storage devices, there have been extensive efforts to push its limit meet ever increasing demands increase density for applications such as electric vehicles, portable electronics, and grid storages. Here, lithium metal anode plays a key role in next generation ultimately enabling anode-free configuration. However, are major challenges that need be overcome. These include low Coulombic efficiency formation dendrites. In this work, we adopted gallium-based liquid (LM) coating layer on copper current collector uniformly deposit prevent dendrite improve cycle efficiency. The LM effectively improved performance configuration combined with Li(Ni,Co,Mn)O 2 cathode. effect was confirmed by situ transmission electron microscopy optical observations. reduced charge/discharge overpotentials high affinity lithium. It also contributed decompose dendritic discharge process reducing dead disconnected from collector.