A robust, highly reversible, mixed conducting sodium metal anode

被引:34
作者
Cao, Keshuang [1 ]
Ma, Qianli [2 ]
Tietz, Frank [2 ]
Xu, Ben Bin [3 ]
Yan, Mi [1 ]
Jiang, Yinzhu [1 ]
机构
[1] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Clean Energy Ultilizat, Hangzhou 310027, Peoples R China
[2] Forschungszentrum Julich, Inst Energy & Climate Res, Mat Synth & Proc IEK 1, D-52425 Julich, Germany
[3] Northumbria Univ, Fac Engn & Environm, Smart Mat & Surfaces Lab, Mech Engn, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England
基金
中国国家自然科学基金;
关键词
Sodium metal battery; Sodium metal anode; Solid Na-ion conductor; Dendrite; Cycling stability; PROGRESS; LAYER;
D O I
10.1016/j.scib.2020.06.005
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Sodium metal anode holds great promise in pursuing high-energy and sustainable rechargeable batteries, but severely suffers from fatal dendrite growth accompanied with huge volume change. Herein, a robust mixed conducting sodium metal anode is designed through incorporating NaSICON-type solid Na-ion conductor into bulk Na. A fast and continuous pathway for simultaneous transportation of electrons and Na+ is established throughout the composite anode. The intimate contact between Na-ion conducting phase and Na metallic phase constructs abundant two-phase boundaries for fast redox reactions. Further, the compact configuration of the composite anode substantially protects Na metal from being corroded by liquid organic electrolyte for the minimization of side reactions. Benefiting from the unique configuration, the composite anode shows highly reversible and durable Na plating/stripping behavior. The symmetric cells exhibit ultralong lifespan for over 700 h at 1 mA cm(-2) with a high capacity of 5 mAh cm(-2) and outstanding rate capability up to 8 mA cm(-2) in the carbonate electrolyte. Full cells with Na3V2(PO4)(3)/C cathode demonstrate impressive cycling stability (capacity decay of 0.012% per cycle) and low charge/discharge polarization as well. This work provides new insights into rational design and development of robust sodium metal anode through an architecture engineering strategy for advanced rechargeable sodium batteries. (C) 2020 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
引用
收藏
页码:179 / 186
页数:8
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