A High Conductivity 1D π-d Conjugated Metal-Organic Framework with Efficient Polysulfide Trapping-Diffusion-Catalysis in Lithium-Sulfur Batteries

A High Conductivity 1D π-d Conjugated Metal-Organic Framework with Efficient Polysulfide Trapping-Diffusion-Catalysis in Lithium-Sulfur Batteries

© 2022 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 34(2022), 10 vom: 19. März, Seite e2108835
1. Verfasser: Yang, Dawei (VerfasserIn)
Weitere Verfasser: Liang, Zhifu, Tang, Pengyi, Zhang, Chaoqi, Tang, Mingxue, Li, Qizhen, Biendicho, Jordi Jacas, Li, Junshan, Heggen, Marc, Dunin-Borkowski, Rafal E, Xu, Ming, Llorca, Jordi, Arbiol, Jordi, Morante, Joan Ramon, Chou, Shu-Lei, Cabot, Andreu
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article lithium polysulfide lithium-sulfur batteries metal organic frameworks π-d conjugation
Beschreibung
Zusammenfassung:© 2022 Wiley-VCH GmbH.
The shuttling behavior and sluggish conversion kinetics of the intermediate lithium polysulfides (LiPS) represent the main obstructions to the practical application of lithium-sulfur batteries (LSBs). Herein, a 1D π-d conjugated metal-organic framework (MOF), Ni-MOF-1D, is presented as an efficient sulfur host to overcome these limitations. Experimental results and density functional theory calculations demonstrate that Ni-MOF-1D is characterized by a remarkable binding strength for trapping soluble LiPS species. Ni-MOF-1D also acts as an effective catalyst for S reduction during the discharge process and Li2 S oxidation during the charging process. In addition, the delocalization of electrons in the π-d system of Ni-MOF-1D provides a superior electrical conductivity to improve electron transfer. Thus, cathodes based on Ni-MOF-1D enable LSBs with excellent performance, for example, impressive cycling stability with over 82% capacity retention over 1000 cycles at 3 C, superior rate performance of 575 mAh g-1 at 8 C, and a high areal capacity of 6.63 mAh cm-2 under raised sulfur loading of 6.7 mg cm-2 . The strategies and advantages here demonstrated can be extended to a broader range of π-d conjugated MOFs materials, which the authors believe have a high potential as sulfur hosts in LSBs
Beschreibung:Date Revised 10.03.2022
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202108835