Lithium (Li) metal represents one of the most promising anode materials for constructing high-energy-density rechargeable batteries. However, uncontrolled Li dendrite growth induces limited lifespan and safety hazards, impeding the development of Li metal batteries severely. Introducing a Li host has been shown to effectively relieve dendrite growth, while further construction of lithiophilic sites will significantly facilitate uniform Li deposition for stably cycling Li metal batteries. Herein, a boroxine covalent organic framework (COF-1) is employed to construct a lithiophilic host for dendrite inhibition in working Li metal batteries. The well-defined boroxine sites demonstrate ideal lithiophilicity to reduce the Li nucleation energy barrier, and the ordered framework structure of COF-1 affords a uniform distribution of the lithiophilic sites. As a result, the COF-1-based Li host affords a more than doubled lifespan of routine anodes in both half- and full cells. This work demonstrates the promising potential of applying advanced framework materials to essential energy-related processes.

锂（Li）金属代表用于构建高能量密度可充电电池的最有希望的负极材料之一。然而，不受控制的锂枝晶生长会导致有限的寿命和安全隐患，严重阻碍了锂金属电池的发展。已经证明，引入Li基质可以有效地缓解枝晶生长，而进一步形成亲脂性位点将显着促进均匀的Li沉积，从而稳定地循环使用Li金属电池。在本文中，使用环硼氧烷共价有机骨架（COF-1）来构建锂硫基主体，以抑制锂金属电池在工作中的枝晶生长。定义明确的环硼氧烷位点显示出理想的亲锂性，以减少Li核能垒，并且COF-1的有序框架结构提供了亲锂性位点的均匀分布。结果，基于COF-1的Li基质在半电池和全电池中都提供了比常规阳极更长一倍的寿命。这项工作证明了将先进的框架材料应用于与能源相关的必不可少的潜力。