文献类型：期刊文献

英文题名：Oxygen-defect-rich coating with nanoporous texture as both anode host and artificial SEI for dendrite-mitigated lithium-metal batteries

作者：Wu, Qingping[1,2];Yao, Zhenguo[2,4];Du, Aochen[3];Wu, Han[2];Huang, Minsong[2,4];Xu, Jun[1];Cao, Fahai[1];Li, Chilin[2,4]

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, Key Lab Transparent Optofunct Inorgan Mat, Shanghai, Peoples R China;[4]Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

年份：2021

卷号：9

期号：9

起止页码：5606

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20211110070883);WOS:【SCI-EXPANDED(收录号:WOS:000627067700026)】；

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 (16DZ2270100). The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：Lithium - Solid electrolytes - Lithium batteries - Charge transfer - Oxygen - Plating - Seebeck effect - Textures

摘要：The fragility of the natural solid electrolyte interphase (SEI) and deformability of the naked Li anode cannot meet the requirements of high coulombic efficiency (CE) and long-period cycling for Li metal batteries (LMBs). Accordingly, conductive porous anode hosts with surface decoration/defect modulation appear to be an effective solution to restrain the growth of Li dendrites. Herein, we propose an unusual oxygen-defect-rich nanoporous MgOx coating bonded with carboxyl-rich carbon wires (MgOx-C), which act as a 3D monolithic host and artificial SEI film simultaneously, to achieve dendrite-free LMBs. The enrichment of the lithiophilic (carboxyl groups) and anionphilic (oxygen defects) sites could homogenize the Li deposition process, accommodate the anode volume variation, and mitigate the depletion of the space charge. The highly defective MgOx enabled fast charge transfer, thus result in a high-rate Li plating performance. The initial nucleation and following plating behaviors of Li were significantly optimized by the conversion and alloying reactions between the Li and MgOx domains. The resultant Li@MgOx-C electrode enabled a stable Li plating/stripping process with a low overpotential and high CE, even under the high plating capacity of 10 mA h cm(-2) and high current density of 15 mA cm(-2).