Anchoring Polysulfides and Accelerating Redox Reaction Enabled by Fe-Based Compounds in Lithium–Sulfur Batteries - Details

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Abstract：

The　synergetic　mechanism　of　chemisorption　and　catalysis　play　an　important　role　in　developing　high-performance　lithium–sulfur　(Li–S)　batteries.　Herein,　a　3D　lather-like　porous　carbon　framework　containing　Fe-based　compounds　(including　Fe3C,　Fe3O4,　and　Fe2O3),　named　FeCFeOC,　is　designed　as　the　sulfur　host　and　the　interlayer　on　separator.　Due　to　the　strong　chemisorption　and　catalytic　ability　of　FeCFeOC　composite,　the　soluble　lithium　polysulfides　(LiPSs)　are　first　adsorbed　and　anchored　on　the　surface　of　the　FeCFeOC　composite　and　then　are　catalyzed　to　accelerate　their　conversion　reaction.　In　addition,　the　FexOy　in　Fe-based　compounds　can　spontaneously　react　with　LiPSs　to　form　magnetic　FeSx　species　with　a　larger　size,　further　blocking　the　penetration　of　LiPSs　cross　the　separator.　As　a　result,　the　assembled　Li–S　cells　show　excellent　long-term　stability　(748 mAh g−1　over　500　cycles　at　1.0 C,　and　≈0.036%　decay　per　cycle　for　1000　cycles　at　3.0 C),　a　superb　rate　capability　with　659 mAh g−1　at　5.0 C,　and　lower　electrochemical　polarization.　This　work　introduces　a　feasible　strategy　to　anchor　and　accelerate　the　conversion　of　LiPSs　by　designing　the　multifunctional　Fe-based　compounds　with　high　chemisorption　and　catalytic　activity,　which　advances　the　large-scale　application　of　high-performance　Li–S　batteries.　©　2021　Wiley-VCH　GmbH

Keyword：

Catalysis Catalyst activity Chemisorption Hematite Lithium batteries Lithium compounds Magnetite Phosphorus compounds Polysulfides Porous materials Redox reactions Separators Sulfur

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[ 1 ] [Qiao, Zhensong]State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen; 361005, China
[ 2 ] [Zhang, Yinggan]State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen; 361005, China
[ 3 ] [Meng, Zhaohui]Research Institution for Biomimetics and Soft Matter, Fujian Key Provincial Laboratory for Soft Functional Materials Research, College of Materials, Xiamen University, Xiamen; 361005, China
[ 4 ] [Xie, Qingshui]State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen; 361005, China
[ 5 ] [Lin, Liang]State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen; 361005, China
[ 6 ] [Zheng, Hongfei]State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen; 361005, China
[ 7 ] [Sa, Baisheng]Country Multiscale Computational Materials Facility, College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350100, China
[ 8 ] [Lin, Jie]State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen; 361005, China
[ 9 ] [Wang, Laisen]State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen; 361005, China
[ 10 ] [Peng, Dong-Liang]State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen; 361005, China

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Source ：

Advanced Functional Materials

ISSN： 1616-301X

Year： 2021

Issue： 21

Volume： 31

1 9 . 9 2 4

JCR@2021

1 8 . 5 0 0

JCR@2023

ESI HC Threshold：142

JCR Journal Grade：1

CAS Journal Grade：1

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WoS CC Cited Count：

SCOPUS Cited Count： 121

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 1

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