Cathode properties of sodium iron phosphate glass for sodium ion batteries
| Autor: | Tsuyoshi Honma, Satoshi Nakata, Takayuki Komatsu, Takuya Togashi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Sodium Inorganic chemistry chemistry.chemical_element 02 engineering and technology Activation energy Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Cathode 0104 chemical sciences Electronic Optical and Magnetic Materials law.invention Anode chemistry law Electrical resistivity and conductivity Materials Chemistry Ceramics and Composites Iron phosphate Crystallization 0210 nano-technology |
| Zdroj: | Journal of Non-Crystalline Solids. 450:109-115 |
| ISSN: | 0022-3093 |
| DOI: | 10.1016/j.jnoncrysol.2016.08.005 |
| Popis: | In order to clarify the possibility of cathode activity of Na 2 O-FeO-P 2 O 5 glasses for sodium ion batteries, glass formation tendency, crystallization behavior, electrical conductivity as well as charge and discharge properties are examined. Glass formation in x FeO–(100- x )NaPO 3 was confirmed for x ≤ 45 by melt quenching up to 1000 °C in N 2 filled electric furnace. By means of electrical conductivity tests, conductivity was increased with increases of x content in x FeO–(100- x )NaPO 3 and the activation energy for electrical conductivity was decreased. Charge and discharge profiles for Na anode exhibits high reversible discharge capacity as 115 mAh/g at 0.1 °C rate in 40FeO-60NaPO 3 (30Na 2 O–40FeO–30P 2 O 5 ) glass. The results on Raman scattering spectra suggests that glass structure is subjected to polymerized Q 1 and Q 2 phosphate units. And polymerized phosphates in glass cause lower density, open structure and sodium ion diffusive channels as well. |
| Databáze: | OpenAIRE |
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