3D printed rGO/CNT microlattice aerogel for a dendrite-free sodium metal anode

被引:98
作者
Yan, Jin [1 ]
Zhi, Gang [1 ]
Kong, Dezhi [1 ]
Wang, Hui [2 ]
Xu, Tingting [1 ]
Zang, Jinhao [1 ]
Shen, Weixia [1 ]
Xu, Junmin [1 ]
Shi, Yumeng [3 ]
Dai, Shuge [1 ]
Li, Xinjian [1 ]
Wang, Ye [1 ]
机构
[1] Zhengzhou Univ, Sch Phys & Microelect, Key Lab Mat Phys, Minist Educ, Zhengzhou 450052, Peoples R China
[2] City Univ Hong Kong, Ctr Super Diamond & Adv Films COSDAF, Dept Chem, Hong Kong 999077, Peoples R China
[3] Shenzhen Univ, Int Collaborat Lab 2D Mat Optoelect Sci & Technol, Inst Microscale Optoelect, Minist Educ,Engn Technol Res Ctr 2D Mat Informat, Shenzhen 518060, Peoples R China
基金
中国国家自然科学基金;
关键词
LITHIUM METAL; GRAPHENE; NA; BATTERY; ELECTRODES; INTERFACE; CHEMISTRY; STORAGE; HOST;
D O I
10.1039/d0ta05817c
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
Uncontrolled dendrite formation induces inferior electrochemical performance in sodium metal and even severe safety issues, resulting in metallic sodium anode being unsuitable for practical applications. Herein, an artificial reduced graphene oxide/carbon nanotube (rGO/CNT) microlattice aerogel was constructed using three-dimensional (3D) printing technology and further adopted as a sodium metal host. With its specially designed architecture, the 3D rGO/CNT microlattice aerogel can effectively reduce the local current density and provide abundant active nucleation sites, resulting in homogeneous sodium deposition to overcome the issue of dendrite formation. As a result, the Na@rGO/CNT microlattice anode enables an areal capacity of 1 mA h cm(-2) at 2 mA cm(-2) with a small nucleation overpotential of 17.8 mV, with a stable cycling performance for 640 cycles at a high current density of 8 mA cm(-2). The experimental and simulation results show that the improved performance can be attributed to the rational design of the hierarchical rGO/CNT microlattice aerogel with tuned surface kinetics. Finally, a full battery using a 3D Na@rGO/CNT microlattice as an anode was assembled and delivered a capacity of 67.6 mA h g(-1) at 100 mA g(-1) after 100 cycles. Our results demonstrate that the 3D printed rGO/CNT microlattice aerogel is a promising candidate as a sodium metal host for future generation of sodium metal batteries.
引用
收藏
页码:19843 / 19854
页数:12
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