Unveiling the sodium intercalation properties in Na1.86□0.14Fe3(PO4)3
| Autor: | Mariam Al Ali Al-Maadeed, Ilias Belharouak, H. Ben Yahia, Moulay Tahar Sougrati, Kenza Maher, Ali Abouimrane, Joonhyeok Park, Y.-K. Sun, Rachid Essehli |
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| Rok vydání: | 2016 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry Na1.86Fe3(PO4)3 Inorganic chemistry Sodium ion batteries Energy Engineering and Power Technology Phosphate 02 engineering and technology Advanced materials 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Engineering physics Positive electrode 0104 chemical sciences Intercalation Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Electrochemical energy storage |
| Zdroj: | Journal of Power Sources. 324:657-664 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2016.05.125 |
| Popis: | The new compound Na1.86□0.14Fe3(PO4)3 was successfully synthesized via hydrothermal synthesis and its crystal structure was determined using powder X-ray diffraction data. Na1.86Fe3(PO4)3 was also characterized by operando XRD and Mössbauer spectroscopy, cyclic voltammetry, and galvanostatic cycling. Na1.86Fe3(PO4)3 crystallizes with the alluaudite-type structure with the eight coordinated Na1 and Na2 sodium atoms located within the channels. The combination of the Rietveld- and Mössbauer-analyses confirms that the sodium vacancies in the Na1 site are linked to a partial oxidation of Fe2+ during synthesis. The electrochemical tests indicated that Na1.86Fe3(PO4)3 is a 3 V sodium intercalating cathode. At the current densities of 5, 10, and 20 mA g−1, the material delivers the specific capacities of 109, 97, and 80 mA h g−1, respectively. After 100 charge and discharge cycles, Na1.86Fe3(PO4)3 exhibited good sodium removal and uptake behavior although no optimizations of particle size, morphology, and carbon coating were performed. The authors thank Qatar Foundation for the financial support allocated to the field of electrochemical energy storage. They also thank the Center for Advanced Materials (CAM) in Qatar University for carrying out experiments. Scopus |
| Databáze: | OpenAIRE |
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