Synthesis and Electrochemical Performance of the Na3V2(PO4)3 Cathode for Sodium-Ion Batteries
| Autor: | I-Ming Hung, Samuel Jafian, Nguyen Van Nghia |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Battery (electricity)
Materials science Sodium Analytical chemistry Vanadium chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Redox Cathode 0104 chemical sciences Electronic Optical and Magnetic Materials Ion law.invention chemistry law Materials Chemistry Electrical and Electronic Engineering 0210 nano-technology Faraday efficiency |
| Zdroj: | Journal of Electronic Materials. 45:2582-2590 |
| ISSN: | 1543-186X 0361-5235 |
| DOI: | 10.1007/s11664-016-4425-5 |
| Popis: | Rhombohedral Na3V2(PO4)3 with a Na+ superionic conductor structure was synthesized using a solid-state reaction method. Citric acid was used as a carbon resource for carbon-thermal reduction reaction to reduce the oxidation state of vanadium. The shape of Na3V2(PO4)3 particles is irregular and its average diameter is in the range 30–50 nm. The Na3V2(PO4)3 exhibits a superior cycling ability and rate capability. The discharge capacity retains 74.3% of the discharge capacity of its first cycle with coulombic efficiency of 99.3% after 100 cycles. The discharge capacity of Na3V2(PO4)3 at 10 C is 48.87 mAh g−1, which is 58.4% of the cell cycled at 0.1 C. Furthermore, the structure of Na3V2(PO4)3 is stable for a considerable amount of Na+ ions (2 mol of Na+ ions) insertion and extraction with only 0.42% difference of unit-cell volume between fully charged and discharged states. Na3V2(PO4)3 is a potential cathode material for sodium-ion battery applications. |
| Databáze: | OpenAIRE |
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