4.8 Article

Improved Reversibility of Fe3+/Fe4+ Redox Couple in Sodium Super Ion Conductor Type Na3Fe2(PO4)3 for Sodium-Ion Batteries

Journal

ADVANCED MATERIALS
Volume 29, Issue 12, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201605694

Keywords

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Funding

  1. MOE [ARC 26/13, MOE2013-T2-1-034, ARC 19/15, MOE2014-T2-2-093, MOE2015-T2-2-057, RG5/13]
  2. NTU under Start-Up Grant in Singapore [M4081296.070.500000]
  3. Cooperative Research Centre for Advanced Automotive Technology, Department of Industry and Science of the Australian Government [Auto CRC 1-111]

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The methodology employed here utilizes the sodium super ion conductor type sodium iron phosphate wrapped with conducting carbon network to generate a stable Fe3+/Fe4+ redox couple, thereby exhibiting higher operating voltage and energy density of sodium-ion batteries. This new class of sodium iron phosphate wrapped by carbon also displays a cycling stability with >96% capacity retention after 200 cycles.

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