Novel Insight into Rechargeable Aluminum Batteries with Promising Selenium Sulfide@Carbon Nanofibers Cathode. Issue 8 (21st December 2022)

• Record Type: Journal Article
• Authors: Li, Linlin; Ma, Yanchen; Cui, Fangyan; Li, Yan; Yu, Deshuang; Lian, Xintong; Hu, Yuxiang; Li, Hongyi; Peng, Shengjie
• Is Part Of: Advanced materials. Volume 35:Issue 8(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-21
• Subjects: free‐standing structures -- interaction bonds -- nanofibers -- rechargeable aluminum batteries -- selenium sulfide; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202209628
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Due to the unique electronic structure of aluminum ions (Al 3+ ) with strong Coulombic interaction and complex bonding situation (simultaneously covalent/ionic bonds), traditional electrodes, mismatching with the bonding orbital of Al 3+, usually exhibit slow kinetic process with inferior rechargeable aluminum batteries (RABs) performance. Herein, to break the confinement of the interaction mismatch between Al 3+ and the electrode, a previously unexplored Se2.9 S5.1 ‐based cathode with sufficient valence electronic energy overlap with Al 3+ and easily accessible structure is potentially developed. Through this new strategy, Se2.9 S5.1 encapsulated in multichannel carbon nanofibers with free‐standing structure exhibits a high capacity of 606 mAh g −1 at 50 mA g −1, high rate‐capacity (211 mAh g −1 at 2.0 A g −1 ), robust stability (187 mAh g −1 at 0.5 A g −1 after 3, 000 cycles), and enhanced flexibility. Simultaneously, in/ex‐situ characterizations also reveal the unexplored mechanism of Sex Sy in RABs. Abstract : Via constructing sufficient valence electronic energy overlapped with aluminum ions and easily accessible structure, an unexplored high‐performance Se2.9 S5.1 cathode in rechargeable aluminum batteries is proposed with detailed mechanism characterizations. Through this new strategy, multichannel selenium sulfide@carbon nanofiber (Se2.9 S5.1 @MCNF) exhibits high capacity (606 mAh g −1 at 50 mA g −1 ), high rate‐capacity (211 mAh g −1 at 2 A g −1 ), and robust stability.