文献类型：期刊文献

英文题名：An in situ LiF-enriched solid electrolyte interphase from CoF2-decorated N-doped carbon for dendrite-free Li metal anodes

作者：Jin, Xiaopan[1];Huang, Gaoxu[1];Zhao, Xianming[1];Chen, Guoli[1];Guan, Mengjia[1];Li, Yongsheng[1,2]

机构：[1]East China Univ Sci & Technol, Frontier Sci Ctr Mat Biol & Dynam Chem, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn,Lab Low Dimens Mat Chem,Key Lab, Shanghai 200237, Peoples R China;[2]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China

年份：2023

卷号：2

期号：5

起止页码：725

外文期刊名：ENERGY ADVANCES

收录：WOS:【ESCI(收录号:WOS:001105880000001)】；

基金：The authors acknowledge financial support from the National Natural Science Foundation of China (No. 51621002, and 51972112), the Leading Talents in Shanghai in 2018 and the 111 project (B14018).

语种：英文

摘要：Lithium (Li) metal has shown great potential as the anode for high-energy-density rechargeable batteries due to its ultrahigh theoretical specific capacity and low redox potential. However, the practical application of the Li metal anode is inherently limited by the uncontrollable Li dendrite growth and unstable solid electrolyte interphase (SEI) layer. Herein, a CoF2-decorated N-doped carbon (denoted as CoF2@NC) is synthesized by a convenient fluoridation treatment after the carbonization of ZIF-67 precursor and used as a functional coating on the bare Cu current collector for enabling uniform Li deposition. Due to the lithiophilic properties of the CoF2@NC matrix and the as-generated LiF-enriched SEI layer, the CoF2@NC-modified current collector demonstrates decreased nucleation potential and a more stable Li stripping/plating process. As a result, the symmetric cell with a Li@CoF2@NC/Cu electrode exhibits substantially enhanced cycling stability for 1200 h under the conditions of 1 mA cm(-2) and 1 mA h cm(-2). Moreover, the assembled LiFePO4 full cell with a Li@CoF2@NC/Cu anode delivers excellent rate performance and cycling stability, endowing high initial discharge capacity (149.3 mA h g(-1)) and capacity retention (95.45%) after 500 cycles at 1C. This work emphasizes that the synergistic effect of the lithiophilic substrate and robust SEI layer is essential for high-performance Li metal batteries.