Bimetallic composite induced ultra-stable solid electrolyte interphase for dendrite-free lithium metal anode

被引:17
作者
Yang, Jian [1 ]
Feng, Tingting [1 ]
Zhi, Chen [1 ]
Li, Jingzhu [1 ]
Zhou, Haiping [1 ]
Chen, Cheng [1 ]
Song, Yaochen [1 ]
Wu, Mengqiang [1 ]
机构
[1] Univ Elect Sci & Technol China UESTC, Sch Mat & Energy, Chengdu 611731, Peoples R China
关键词
Li metal anode; Dendrite-free; Bimetallic composite; Ultra-stable SEI; DEPOSITION; CHALLENGES; MECHANISMS; BATTERIES; GROWTH; LAYER;
D O I
10.1016/j.jcis.2021.04.067
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Lithium metal is the most promising anode materials for the next generation lithium ion battery. However, the electrode polarization leads to the formation of dendrites and ''dead lithium", which degrades the performance of lithium metal batteries and induce a variety of security risk. The electrode polarization and lithium dendrites can be suppressed by lithium metal composite electrode. Herein, a simple and effective strategy is adopted to construct nickel and lithium bimetallic composite (NiLi-BC) electrode by a double roll process. The Ni framework inside the electrode can optimize the electric field and Li+ distribution at the electrode/electrolyte interface and induce the uniform lithium deposition. As a result, the NiLi-BC exhibits a lithium dendrite-free feature and stable cycling performance under a low overpotential (<15 mV throughout 2180 h at 1 mA cm(-2) with a deposition capacity of 1 mAh cm(-2)). Moreover, the assembled NiLi-BC vertical bar vertical bar LiFePO4 coin cell and pouch cell exhibit improved capability and stable cycling performance. Finally, the in-situ optical microscopy and in-situ Raman spectroscopy are employed to obtain a better understanding of the interfacial structure and chemical component during the Li plating and striping processes. The scheme of this study of the NiLi electrode has great practical application value. (C) 2021 Published by Elsevier Inc.
引用
收藏
页码:819 / 827
页数:9
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