A self-adapting artificial SEI layer enables superdense lithium deposition for high performance lithium anode

被引:60
作者
Dong, Qingyuan [1 ]
Hong, Bo [1 ,2 ]
Fan, Hailin [1 ]
Gao, Chunhui [1 ]
Huang, XinJing [1 ]
Bai, Maohui [3 ]
Zhou, Yangen [1 ]
Lai, Yanqing [1 ,2 ]
机构
[1] Cent South Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
[2] Engn Res Ctr Adv Battery Mat, Minist Educ, Changsha 410083, Hunan, Peoples R China
[3] Cent South Univ, Powder Met Res Inst, Changsha 410083, Hunan, Peoples R China
基金
中国国家自然科学基金;
关键词
Artificial SEI; Lithium metal battery; CMC-Li; Lithium dendrite; Superdense deposition; LI METAL; CMC-LI; ELECTROCHEMICAL PERFORMANCE; FILM; BATTERY; BINDER;
D O I
10.1016/j.ensm.2021.11.022
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
Metallic lithium (Li) is known to consider a critical role in next-generation rechargeable batteries. However, the uncontrolled growth of Li dendrites result in low Coulombic efficiency and safety issues in applications of Li metal batteries. High capacity and stable dense deposits of lithium metal are of great significant for high energy density battery. Herein, we propose a suitable degree of substitution for Carboxymethylcellulose Lithium (CMC-Li) as an artificial SEI layer, which has a high ionic transference number (0.66), high Young's modulus (24.6 GPa) and good lithiophilicity, then it can adapt to the volume changes of the lithium anode, enable superdense lithium deposits on Cu collector. The metallic lithium anode with CMC-Li films (CMC-Li@Li) delivers excellent cycling performance in the symmetrical cell at a large current density of 10 mA cm(-2) and an areal capacity of 10 mAh cm(-2) for almost 300 h. Moreover, the CMC-Li@Li||NCM613 full cell (N/P = 2) delivers an initial specific capacity of 165 mAh g(-1) with a high retention of 80% after 200 cycles.
引用
收藏
页码:1220 / 1228
页数:9
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