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© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Lithium–sulfur batteries suffer from poor cycling stability at high areal sulfur loadings (ASLs) mainly because of the infamous shuttle problem and the increasing diffusion distance for ions to diffuse along the vertical direction of the cathode plane. Here, a carbon nanotube (CNT)/graphene (Gra)‐S‐Al3Ni2 cathode with 3D network structure is designed and prepared. The 3D network configuration and the Al in the Al3Ni2 provide an efficient channel for fast electron and ion transfer in the three dimensions, especially along the vertical direction of the cathode. The introduction of Ni in the Al3Ni2 is able to suppress the shuttle effect via accelerating reaction kinetics of lithium polysulfide species conversion reactions. The CNT/Gra‐S‐Al3Ni2 cathode exhibits ultrahigh cycle‐ability at 1 C over 800 cycles, with a capacity degradation rate of 0.055% per cycle. Additionally, having high ASLs of 3.3 mg cm−2, the electrode delivers a high reversible areal capacity of 2.05 mA h cm−2 (622 mA h g−1) over 200 cycles at a higher current density of 2.76 mA cm−2 with high capacity retention of 85.9%. The outstanding discharge performance indicates that the design offers a promising avenue to develop long‐life cycle and high‐sulfur‐loading Li–S batteries.

Details

Title
3D CNTs/Graphene‐S‐Al 3 Ni 2 Cathodes for High‐Sulfur‐Loading and Long‐Life Lithium–Sulfur Batteries
Author
Guo, Zeqing 1 ; Nie, Huagui 1 ; Yang, Zhi 1   VIAFID ORCID Logo  ; Wuxing Hua 1 ; Ruan, Chunping 1 ; Chan, Dan 1 ; Ge, Mengzhan 1 ; Chen, Xi'an 1 ; Huang, Shaoming 2 

 Nanomaterials & Chemistry Key Laboratory, Wenzhou University, Wenzhou, China 
 Nanomaterials & Chemistry Key Laboratory, Wenzhou University, Wenzhou, China; School of Material and Energy, Guangdong University of Technology, Guangzhou, China 
Section
Full Papers
Publication year
2018
Publication date
Jul 2018
Publisher
John Wiley & Sons, Inc.
e-ISSN
21983844
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2262719567
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.