journal article·2024-03-12

Mitigating the Shuttle Effect: 3D Covalent Organic Frameworks Anchoring Polysulfides for High-Performance Lithium–Sulfur Batteries

Zhiyang Wang, Xiaowei Wu, Shanyue Wei, Yiming Xie, Can-Zhong Lu

Chemistry of Materials· Volume 36· Issue 5
Publisher page

Abstract

Lithium–sulfur batteries (LSBs) are promising candidates for next-generation high-performance batteries due to their high energy density, low cost, and environmental friendliness. However, issues such as low active material utilization, volume expansion, and serious shuttle effect have severely restricted their practical application. Herein, two 3D covalent organic frameworks (COFs), TFPB-TAA and TFPB-TAB with pto topology, are synthesized and applied as cathodes materials in LSBs. The abundant porosity in the 3D pto structure helps inhibit the shuttle effect and enables uniform sulfur distribution. Density functional theory calculations predict their strong polysulfide adsorption capacity. Impressive initial capacities of 1288 mA h/g for TFPB-TAA and 1192 mA h/g for TFPB-TAB are achieved at 0.1C along with exceptional capacity retentions of 69.3 and 73.5% at 0.5C after 400 cycles. This work provides new insights into the design of 3D COFs for advanced LSBs.
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Research context

OpenAlex topics: Covalent Organic Framework Applications · Advanced Battery Materials and Technologies · Metal-Organic Frameworks: Synthesis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P.R. China

Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Xiamen 361021, P.R. China

University of Chinese Academy of Sciences, Beijing 100049, China

Engineering Research Center of Environment-Friendly Function Materials, Ministry of Education, College of Materials Science & Engineering, Huaqiao University, Xiamen 361021, P.R. China

Funding

China Postdoctoral Science Foundation · Natural Science Foundation of Fujian Province · Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China · National Natural Science Foundation of China · Chinese Academy of Sciences · XIREM autonomously deployment project

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