Dendrite-free Li metal anode by lowering deposition interface energy with Cu99Zn alloy coating

被引：122

作者：

Liu, Shan ^{[1
]}

Zhang, Xinyue ^{[1
]}

Li, Rongsheng ^{[2
]}

Gao, Libo ^{[2
]}

Luo, Jiayan ^{[1
,3
]}

机构：

[1] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Sch Chem Engn & Technol,Minist Educ, State Key Lab Chem Engn,Key Lab Green Chem Techno, Tianjin 300072, Peoples R China

[2] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Nankai Univ, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin, Peoples R China

来源：

ENERGY STORAGE MATERIALS | 2018年 / 14卷

基金：

中国国家自然科学基金;

关键词：

Li metal anodes; Artificial defect; Battery; Interface energy; CuZn alloy; STABLE LITHIUM ELECTRODEPOSITION; CURRENT COLLECTOR; VOLUME-CHANGE; BATTERIES; GROWTH; ELECTROLYTES;

D O I：

10.1016/j.ensm.2018.03.004

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：

Li should be the ultimate anode due to its highest theoretical capacity and lowest electrochemical potentials. However, the dendrite formation has been the grand challenge hindering their direct use. Here we modified the commercial anode Cu current collectors with atomically distributed Zn artificial defects by magnetic sputtering of Cu99Zn. Zn has definite solubility in Li metal and can form solid solution before Li metal deposition, lowering the deposition interface energy between current collectors and metal anodes. With atomically distributed seeds, significantly improved performance of Li metal anodes was achieved with depressed dendrite formation on both planar and 3D Cu. The Li-Li symmetric cell can be stably cycled for more than 1000 h. Coulombic efficiency over 98% at Li deposition capacity of 10 mAh cm(-2) could be maintained. We anticipate that high performance lithium metal batteries could be realized by using this anode combined with optimized electrolytes and cathodes.

引用

页码：143 / 148

页数：6

共 33 条

[1] Building better batteries [J].