LAUSR

Li metals, because of the ultrahigh theoretical capacity, have attracted extensive attentions. However, uncontrollable dendritic Li formations and infinite electrode dimensional variation hinder application of Li anodes. Herein, Zn, Co bimetallic zeolitic imidazolate frameworks (ZIFs) were synthesized and further pyrolyzed to obtain Zn, Co-containing N-doped porous carbon nanocube (Zn/Co-N@PCN), which was further applied as lithiophilic host to construct the lithiated Zn/Co-N@PCN (Li-Zn/Co-N@PCN). Zn vapor produced many pores on the carbon framework during calcination process that can store enough Li storage and thus inhibit huge electrode volume change. Additionally, there were abundant lithiophilic groups in Zn/Co-N@PCN, such as N-based or Co/Zn-based species, which were beneficial to uniform Li deposition. Moreover, the stable and conductive carbon-based matrix can ensure the superior and reproducible Li plating/stripping behavior in Zn/Co-N@PCN over cycling. As a result, the Li-Zn/Co-N@PCN anode showed the steady and high columbic efficiency of ~ 99.0% for 600 cycles at 0.5 mA cm -2 . More interestingly, the Li-Zn/Co-N@PCN based Li-O2 battery could continuously work beyond 200 cycles that was superior to that of the cell with the Li-Cu anode. These results in this work provided a novel way for construction of the advanced Li-based anodes and the corresponding high-performance Li-O2 batteries.