Optimizing the Fermi Level of a 3D Current Collector with Ni3S2/Ni3P Heterostructure for Dendrite-Free Sodium-Metal Batteries

Huang，Huijuan1; Wang，Yunlei1,2; Li，Menghao3; Yang，Hai1; Chen，Zhihao1; Jiang，Yang4; Ye，Shufen1; Yang，Yaxiong5; He，Shengnan5; Pan，Hongge5; Wu，Xiaojun1,2; Yao，Yu1; Gu，Meng3; Yu，Yan1,6

2023

10.1002/adma.202210826

Advanced Materials   Impact Factor & Quartile

0935-9648

1521-4095

Rechargeable sodium-metal batteries (RSMBs) with high energy density and low cost are attracting extensive attention as promising energy-storage technologies. However, the poor cyclability and safety issues caused by unstable solid electrolyte interphase (SEI) structure and dendrite issues limit their practical application. Herein, it is theoretically predicted that constructing the NiS/NiP heterostructure with high work function can lower the Fermi energy level, and therefore effectively suppressing continuous electrolyte decomposition derived from the electron-tunneling effect after long-term sodiation process. Furthermore, the NiS/NiP heterostructure on 3D porous nickel foam (NiS/NiP@NF) is experimentally fabricated as an advanced Na-anode current collector. The seamless NiS/NiP heterostructure not only offers abundant active sites to induce uniform Na deposition and enhance ion-transport kinetics, but also facilitates the formation of stable SEI for dendrite-free sodium anode, which are confirmed by cryogenic components transmission electron microscopy tests and in situ spectroscopy characterization. As a result, the Na-composite anode (NiS/NiP@NF@Na) delivers stable plating/stripping process of 5000 h and high average Coulombic efficiency of 99.7% over 2500 cycles. More impressively, the assembled sodium-ion full cell displays ultralong cycle life of 10 000 cycles at 20 C. The strategy of stabilizing the sodium-metal anode gives fundamental insight into the potential construction of advanced RSMBs.

current collectors Fermi level heterostructures sodium-metal batteries solid electrolyte interphase

SCI

English

NI Journal Papers

Corresponding

WOS:000950370100001

MATERIALS SCIENCE

2-s2.0-85150711039

Scopus

1.Hefei National Research Center for Physical Sciences at the Microscale,Department of Materials Science and Engineering,CAS Key Laboratory of Materials for Energy Conversion,iChEM (Collaborative Innovation Center of Chemistry for Energy Materials),University of Science and Technology of China,Hefei,Anhui,230026,China
2.Collaborative Innovation Center of Chemistry for Energy Materials,and CAS Center for Excellence in Nanoscience,University of Science and Technology of China,Hefei,Anhui,230026,China
3.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.Jiujiang,DeFu Technology Co. Ltd.,Jiujiang,Jiangxi,332000,China
5.Institute of Science and Technology for New Energy,Xi'an Technological University,Xi'an,710021,China
6.National Synchrotron Radiation Laboratory,Hefei,Anhui,230026,China

Huang，Huijuan,Wang，Yunlei,Li，Menghao,et al. Optimizing the Fermi Level of a 3D Current Collector with Ni3S2/Ni3P Heterostructure for Dendrite-Free Sodium-Metal Batteries[J]. Advanced Materials,2023.

Huang，Huijuan.,Wang，Yunlei.,Li，Menghao.,Yang，Hai.,Chen，Zhihao.,...&Yu，Yan.(2023).Optimizing the Fermi Level of a 3D Current Collector with Ni3S2/Ni3P Heterostructure for Dendrite-Free Sodium-Metal Batteries.Advanced Materials.

Huang，Huijuan,et al."Optimizing the Fermi Level of a 3D Current Collector with Ni3S2/Ni3P Heterostructure for Dendrite-Free Sodium-Metal Batteries".Advanced Materials (2023).