NaN 3 addition, a strategy to overcome the problem of sodium deficiency in P2-Na 0.67 [Fe 0.5 Mn 0.5 ]O 2 cathode for sodium-ion battery
| Autor: | Gurpreet Singh, Juan Miguel López del Amo, Michel Armand, Jaione Martinez de Ilarduya, Laida Otaegui |
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| Rok vydání: | 2017 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Scanning electron microscope Sodium Inorganic chemistry Energy Engineering and Power Technology Sodium-ion battery chemistry.chemical_element Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode 0104 chemical sciences Anode Ion law.invention law Electrode Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Power Sources. 337:197-203 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2016.10.084 |
| Popis: | Sodium-ion full cell with hard carbon as anode and a layered oxide cathode based on earth abundant elements i.e., Na 0.67 [Fe 0.5 Mn 0.5 ]O 2 is reported. The irreversible capacity of the negative electrode in the full cell configuration is compensated by the addition of a sacrificial salt such as NaN 3 to the P2-Na 0.67 [Fe 0.5 Mn 0.5 ]O 2 cathode material. 60% increase in the reversible capacity is achieved with the addition of 10% of sodium azide in the composite cathode without compromise on the cycle life. Though, there is a limit in its use because of the capacity fade which can be observed with the further increase in NaN 3 content. The quantification of sodium ions at the end of discharge (at 1 V) after 40 cycles by ex-situ X-ray diffraction and solid state nuclear magnetic resonance supports the electrochemical data. Scanning electron microscopy shows the effect of NaN 3 on the electrode microstructure in terms of the porosity created by NaN 3 decomposition. |
| Databáze: | OpenAIRE |
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