文献类型：期刊文献

英文题名：Dynamical SEI Reinforced by Open-Architecture MOF Film with Stereoscopic Lithiophilic Sites for High-Performance Lithium-Metal Batteries

作者：Wu, Qingping[1,2,3];Zheng, Yongjian[2,3,4];Guan, Xiang[1];Xu, Jun[1];Cao, Fahai[1];Li, Chilin[2,3,4]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 585 He Shuo Rd, Shanghai 201899, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, Shanghai 201899, Peoples R China;[4]Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

年份：2021

卷号：31

期号：28

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20211810281773);WOS:【SCI-EXPANDED(收录号:WOS:000644874900001)】；

基金：This work was supported by National Key R&D Program of China (2016YFB0901600), NSAF (Grant No. U1830113) and National Natural Science Foundation of China (51772313 and 21975276), and Shanghai Science and Technology Committee (20520710800). The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help on morphology and composition analysis.

语种：英文

外文关键词：dendrite suppression; Li‐ metal batteries; lithiophilic sites; metal organic framework; solid‐ electrolyte interphase

摘要：A vulnerable solid-electrolyte interphase (SEI) layer cannot retard Li dendrite growth, electrolyte consumption, and anode volumetric expansion, which seriously hinders the development of high-safety Li-metal batteries (LMBs). Herein, a dynamical SEI reinforced by an open-architecture metal-organic framework (OA-MOF) film characterized by elastic expansion and contraction of the volume of stereoscopic lithiophilic sites, is designed. The self-adjustment distribution of lithiophilic sites on vertically grown Cu-2(BDC)(2) nanosheets enables the homogenization of Li-ion flux, smart control of Li mass transport, and compaction of Li deposition. The trapped N, N-dimethylformamide molecules in the open framework structure are favorable for the better wetting and dissolution effect of Li-ions accessing to Cu-2(BDC)(2). Combining these advantages, the featured OA-MOF/Cu@Li anode enables a high coulombic efficiency and low voltage hysteresis in Li||Cu cells even at an ultrahigh current density of 15 mA cm(-2).