Abstract
A layered sodium manganese oxide material (NaMn3O5) is introduced as a novel cathode materials for sodium-ion batteries. Structural characterizations reveal a typical Birnessite structure with lamellar stacking of the synthetic nanosheets. Electrochemical tests reveal a particularly large discharge capacity of 219 mAh g-1 in the voltage rang of 1.5-4.7 V vs. Na/Na+. With an average potential of 2.75 V versus sodium metal, layered NaMn3O5 exhibits a high energy density of 602 Wh kg-1, and also presents good rate capability. Furthermore, the diffusion coefficient of sodium ions in the layered NaMn3O 5 electrode is investigated by using the galvanostatic intermittent titration technique. The results greatly contribute to the development of room-temperature sodium-ion batteries based on earth-abundant elements.
Original language | English |
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Pages (from-to) | 2115-2119 |
Number of pages | 5 |
Journal | ChemSusChem |
Volume | 7 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2014 Aug |
Keywords
- cathodes
- electrochemistry
- energy storage
- layered compounds
- sodium-ion batteries
ASJC Scopus subject areas
- Environmental Chemistry
- Chemical Engineering(all)
- Materials Science(all)
- Energy(all)