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High-Entropy Layered Oxide Cathode Materials with Moderated Interlayer Spacing and Enhanced Kinetics for Sodium-Ion Batteries.

Author information

Affiliations

  • 1. Centre for Clean Energy Technology, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, 2007, Australia.
      Authors
    • Huang Z 1
    • Wang S 1
    • Marlton F 1
    • Huang T 1
    • Xiao J 1
    • Li D 1
    • Liu H 1
    • Sun B 1
    • Wang G 1
    (9 authors)
  • 2. Faculty of Materials Science and Energy Engineering, Shenzhen University of Advanced Technology, Shenzhen, Guangdong, 518055, China.
      Authors
    • Guo X 2
    (1 author)
  • 3. Institute for Superconducting & Electronic Materials, University of Wollongong, Innovation Campus, Wollongong, NSW, 2500, Australia.
      Authors
    • Fan Y 3
    • Pang WK 3
    (2 authors)
  • 4. Australian Synchrotron, ANSTO, Clayton, VIC, 3168, Australia.
      Authors
    • Gu Q 4
    (1 author)
  • 5. Department of Physics, Tamkang University, Tamsui, 25137, Taiwan.
      Authors
    • Yang CC 5
    • Dong CL 5
    (2 authors)

ORCIDs linked to this article

Advanced Materials (Deerfield Beach, Fla.), 22 Oct 2024, :e2410857
https://doi.org/10.1002/adma.202410857 PMID: 39439132 

Abstract 

Sodium-ion batteries (SIBs) with low cost and environmentally friendly features have recently attracted significant attention for renewable energy storage. Sodium layer oxides stand out as a type of promising cathode material for SIBs owing to their high capacity, good rate performance, and high compatibility for manufacturing. However, the poor cycling stability of layer oxide cathodes due to structure distortion greatly impacts their practical applications. Herein, a high entropy doped Cu, Fe, and Mn-based layered oxide (HE-CFMO), Na0.95Li0.05Mg0.05Cu0.20Fe0.22Mn0.35Ti0.13O2 for high-performance SIBs, is designed. The HE-CFMO cathode possesses high-entropy transition metal (TM) layers with a homogeneous stress distribution, providing a moderated interlayer spacing to maintain the structure stability and enhance Na+ ion diffusion. In addition, Li doping in TM layers increases the Mn valence state, which effectively suppresses John-Teller effect, thus stabilizing the layered structure during cycling. Furthermore, the use of nontoxic and low-cost raw materials benefits future commercialization and reduces the risk of environmental pollution. As a result, the HE-CFMO cathode exhibits a super cycling performance with a 95% capacity retention after 300 cycles. This work provides a promising strategy to improve the structure stability and reaction kinetics of cathode materials for SIBs.

Full text links 

Read article at publisher's site: https://doi.org/10.1002/adma.202410857

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    Funding 

    Funders who supported this work.

    ARC Discovery Project (2)

    ARC Future Fellowship (1)

    Australian Research Council

      Diamond Light Source

        I15-1 Beamline (1)

        National Synchrotron Radiation Research Centre

          Powder Diffraction Beamline (1)