Rechargeable Li metal battery is an important option for the systems which required high energy densities, but it confronts some great issues, such as the potential formation of Li dendrites. Li-B alloy has been proven to be a potential alternative choice in lithium batteries, but the coulombic efficiency is still unacceptable. In this study, an artificial SEI layer was prepared on the surface of Li-B alloy using a simple method. Results infer the artificial layer may help to form a more stable SEI layer with consuming fewer lithium ions, which greatly improve the initial coulombic efficiency and the cycling stabilities. These results suggest that Li-B alloy with artificial solid electrolyte interphase layer may be a promising anode material for rechargeable lithium batteries.

可充电锂金属电池是要求高能量密度的系统的重要选择，但它面临一些重大问题，例如锂枝晶的潜在形成。事实证明，Li-B合金是锂电池的潜在替代选择，但库仑效率仍然不可接受。在这项研究中，使用简单的方法在Li-B合金表面上制备了人工SEI层。推断人工层的结果可能有助于以更少的锂离子形成更稳定的SEI层，从而大大提高了初始库仑效率和循环稳定性。这些结果表明，具有人工固体电解质界面层的Li-B合金可能是可再充电锂电池的有希望的负极材料。