The lithium-metal battery (LMB) holds great promise for various applications for which high energy density is required; the adoption of LMB, however, is limited by poor performance of the lithium-metal anode (LMA), which is intrinsically associated with the unregulated ion transport and reaction. By coating an ion-transport rectifier on the LMA, which was synthesized from a metal-organic framework with high lithium-ion transference number and conductivity, we report here the fabrication of an LMB with a thin Li anode (≤50 μm), a thick LiCoO₂ cathode (4 mAh cm⁻²), and lean electrolyte condition. Such an LMB can potentially deliver high gravimetric and volumetric energy density exceeding that of state-of-the-art lithium-ion batteries. This work offers a new strategy to regulate the ion transport and reaction at electrode-electrolyte interphase, facilitating the development of practical LMB for a broad range of applications.

锂金属电池（LMB）在要求高能量密度的各种应用中具有广阔的前景。然而，LMB的采用受到锂金属阳极（LMA）性能不佳的限制，而锂金属阳极的性能与不受控的离子传输和反应本质上相关。通过在LMA上涂覆一个离子传输整流器，该整流器是由具有高锂离子迁移数和电导率的金属有机骨架合成的，我们在这里报告了一种具有薄锂阳极（≤50μm），厚的LiCoO ₂阴极（4 mAh cm ^-2），以及稀薄的电解质条件。这种LMB可以潜在地提供超过现有锂离子电池的高重量和体积能量密度。这项工作提供了一种新的策略来调节电极-电解质界面间的离子迁移和反应，从而为广泛的应用开发了实用的LMB。