508
Home
Dr.Wu
Research
Member
Publications
News
Contact
Publications
 
All
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2007
2006
   
Interfacial Engineering of Bifunctional Niobium (V)-based Heterostructure Nanosheet Toward High Efficiency Lean-Electrolyte Lithium-Sulfur Full Batteries
Posted:2021-04-13 08:53    Column:2021

H.D. Shi, J.Q. Qin, P.F. Lu, C. Dong, J. He, X.J. Chou, P. Das, J.M. Wang, L.Z. Zhang, Z.-S. Wu*

Advanced Functional Materials, 2021, 31, 2102314.

DOI: 10.1002/adfm.202102314 [PDF]

High-efficiency lithium-sulfur (Li-S) batteries depend on advanced electrode structure that can attain high sulfur utilization at lean-electrolyte andminimumamountoflithium. Herein, a twinbornholeyNb4N5-Nb2O5heterostructure was designed as a dual-functional host for both redox-kinetics-accelerated sulfur cathode anddendrite-inhibited lithium anodesimultaneouslyfor long-cycling and lean-electrolyteLi-S full batteries. Benefiting from the accelerative polysulfidesanchoring-diffusion-converting efficiencyof Nb4N5-Nb2O5, polysulfide-shutting was significantly alleviated. Meanwhile, the lithiophilic nature of holey Nb4N5-Nb2O5was applied as ion-redistributor for homogeneous Li-ion deposition. Taking advantage of these merits, the Li-S full batteries presented excellent electrochemical properties, including a minimum capacity decay rate of 0.025% per cycle, and a high areal capacity of 5.0 mAh cm-2at sulfur loading of 6.9 mg cm-2,correspondingtonegative to positive capacity ratio of 2.4:1 and electrolyte to sulfur ratio of 5.1 μL mg-1.Therefore, this work paves a new avenue for boosting high-performances Li-S batteries towards practical applications.

Dalian Institute of Chemical Physics, CAS
457 Zhongshan Road Dalian, China 116023
E-mail: wuzs@dicp.ac.cn

Copyright © 2D Materials Chemistry & Energy Applications Group. All Rights Reserved.

Home / Dr.Wu / Research / Member / Publications / News / Contact