Affiliation:
1. Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion Science Center for Material Creation and Energy Conversion Institute of Frontier and Interdisciplinary Science School of Chemistry and Chemical Engineering Shandong University Qingdao 266237 P. R. China
2. Institute of Chemistry The Chinese Academy of Sciences Beijing 100190 P. R. China
3. School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences 100049 Beijing P. R. China
Abstract
AbstractHere, a strategy to strengthen d–p orbital hybridization by fabricating π backbonding in the catalyst for efficient lithium polysulfides (LiPSs) conversion is reported. A special interface structure of RuOx quantum dots (QDs) anchored on graphdiyne (GDY) nanoboxes (RuOxQDs/GDY) is prepared to enable strong Ru‐to‐alkyne π backdonation, which effectively regulates the d‐electron structures of Ru centers to promote the d–p orbital hybridization between the catalyst and LiPSs and significantly boosts the catalytic performance of RuOxQDs/GDY. The strong affinity with Li ions and fast Li‐ion diffusion of RuOxQDs/GDY also enable ultrastable Li metal anodes. Thus, S@RuOxQDs/GDY cathodes exhibit excellent cycling performance under harsh conditions, and Li@RuOxQDs/GDY anodes show an ultralong cycling life over 8800 h without Li dendrite growth. Lithium‐sulfur (Li–S) full cells with S@RuOxQDs/GDY cathodes and Li@RuOxQDs/GDY anodes can deliver an impressive areal capacity of 17.8 mA h cm−2 and good cycling stability under the practical conditions of low negative‐to‐positive electrode capacity (N/P) ratio (N/P = 1.4), lean electrolyte (E/S = 3 µL mg−1), and high S mass loading (15.4 mg cm−2).
Funder
National Natural Science Foundation of China
Natural Science Foundation of Shandong Province
Taishan Scholar Project of Shandong Province
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
1 articles.
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