Dendrite-Free Reverse Lithium Deposition Induced by Ion Rectification Layer toward Superior Lithium Metal Batteries

被引:70
|
作者
Lin, Liang [1 ]
Liu, Fang [1 ]
Yan, Xiaolin [1 ]
Chen, Qiulin [1 ]
Zhuang, Yanping [1 ]
Zheng, Hongfei [1 ]
Lin, Jie [1 ]
Wang, Laisen [1 ]
Han, Lianhuan [2 ]
Wei, Qiulong [1 ]
Xie, Qingshui [1 ]
Peng, Dong-Liang [1 ]
机构
[1] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Collaborat Innovat Ctr Chem Energy Mat, Fujian Key Lab Mat Genome,Coll Mat, Xiamen 361005, Peoples R China
[2] Xiamen Univ, Sch Aerosp Engn, Dept Mech & Elect Engn, Xiamen 361005, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
dendrite-free lithium anodes; Li; (+) ion flux regulation; porous zinc nanoparticles-assembled films; reverse lithium deposition; separator modification; SOLID-ELECTROLYTE INTERPHASE; SEPARATOR; SUPPRESSION; CHALLENGES; LIQUID; ANODES; GROWTH; FLUX;
D O I
10.1002/adfm.202104081
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Considerable endeavors are developed to suppress lithium (Li) dendrites and improve the cycling stability of Li metal batteries in order to promote their commercial application. Herein, continuous zinc (Zn) nanoparticles-assembled film with homogenous nanopores is proposed as a modified layer for separator via a scalable method. The in situ formed LiZn alloy film during initial Li plating can serve as a Li+ ion rectification and lithiophilic layer to regulate the nucleation and reverse deposition of Li. When applied in Li|LiFePO4 full cells with traditional carbonate-based electrolyte, the modified separator enables outstanding cycling stability of up to 350 cycles without capacity loss at a large rate of 5 C (3.4 mA cm(-2)) and a remarkable reversible capacity of 144 mAh g(-1) after 120 cycles at a commercial mass loading as high as 19.72 mg cm(-2). The excellent electrochemical performances are ascribed to the dendrite-free reverse Li deposition induced by modified layer by means of its lithiophilic property for regulating homogeneous Li nucleation on the separator as well as its well-distributed nanopores for homogenizing Li+ ion flux and enhancing electrolyte wetting.
引用
收藏
页数:11
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