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Optimization of Na-Ion Battery Systems Based on Polyanionic or Layered Positive Electrodes and Carbon Anodes
- Source :
- Journal of The Electrochemical Society, Journal of The Electrochemical Society, Electrochemical Society, 2016, 163 (6), pp.A867-A874. ⟨10.1149/2.0051605jes⟩, Journal of The Electrochemical Society, 2016, 163 (6), pp.A867-A874. ⟨10.1149/2.0051605jes⟩
- Publication Year :
- 2016
- Publisher :
- The Electrochemical Society, 2016.
-
Abstract
- International audience; The revival of the Na-ion battery concept has prompted intense research activities toward new Na-based insertion compounds and their implementation in full Na-ion cells. Herein, we report the optimization of full Na-ion cells consisting of either a layered oxide Nax(Fe1/2Mn1/2)O2 or a polyanionic Na3V2(PO4)2F3 cathode associated with a hard carbon anode. From charge/discharge curves collected via 2 or 3-electrode measurements, the charge/discharge profiles of full cells are simulated to evaluate the maximum energy density these two systems can deliver. Similar energies of 235 W h kg−1 are found for both systems provided that a fully sodiated Na1(Fe1/2Mn1/2)O2 layered phase is used. Experimental cells confirm these values, and cells based on polyanionic compounds surpass the layered cathodes in terms of energy retention, average voltage and rate capabilities. By using Na sources to compensate for carbon's irreversible capacity, energy densities as high as 265 W h kg−1 can be reached with the Na3+xV2(PO4)2F3 / hard C system. Overall, such studies reveal that the gravimetric energy density advantage of layered over polyanionic compounds for Li-ion batteries vanishes by moving to Na-ion. We hope this information will be of great interest for battery manufacturers willing to enroll in the future commercialization of Na-ion batteries.
- Subjects :
- Battery (electricity)
Materials science
Matériaux
Inorganic chemistry
Oxide
chemistry.chemical_element
Na-ion
02 engineering and technology
010402 general chemistry
01 natural sciences
7. Clean energy
[SPI.MAT]Engineering Sciences [physics]/Materials
law.invention
chemistry.chemical_compound
law
Cell balancing
Materials Chemistry
Electrochemistry
Specific energy
Renewable Energy, Sustainability and the Environment
021001 nanoscience & nanotechnology
Condensed Matter Physics
Cathode
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Anode
chemistry
Chemical engineering
Electrode
Full cell
0210 nano-technology
Carbon
Voltage
Subjects
Details
- ISSN :
- 19457111 and 00134651
- Volume :
- 163
- Database :
- OpenAIRE
- Journal :
- Journal of The Electrochemical Society
- Accession number :
- edsair.doi.dedup.....9a9cd6b8ae9e9dd5beb77fb354b2ce0c