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| Content Provider | frontiers |
|---|---|
| Author | Tang, Shibao Zhang, Xiaoping Sui, Yulei Wang, Bingjue Li, Jiangpeng Wu, Ling |
| Abstract | Na2Fe0.6Mn0.4PO4F/C composite materials are synthesized with various carbon sources via a simple spray-drying method in this study, and the effect of carbon sources on structure, morphology and electrochemical properties of Na2Fe0.6Mn0.4PO4F/C materials are investigated in detail. XRD and SEM results indicate that the reduction ability of carbon sources has a key impact on the structure and morphology of Na2Fe0.6Mn0.4PO4F/C composite materials. Among these Na2Fe0.6Mn0.4PO4F/C materials, the sample prepared with ascorbic acid presents uniform hollow spherical architecture. Electrochemical analysis demonstrates that the Na2Fe0.6Mn0.4PO4F/C sample prepared with ascorbic acid has optimal electrochemical performance. The sample shows high discharge capacities of 95.1 and 48.1 mAh g-1 at 0.05C and 1C rates, respectively, and it exhibits an improved cycle stability (91.7% retention after 100 cycles at 0.5C), which are superior to Na2Fe0.6Mn0.4PO4F/C materials prepared with other carbon sources. This study demonstrates that the reduction ability of carbon sources significantly influences the electrochemical properties of fluorophosphate/C composite materials. Besides, this work also provides a promising strategy to obtain high performance cathode materials for sodium-ion batteries. |
| ISSN | 22962646 |
| DOI | 10.3389/fchem.2020.633949 |
| Volume Number | 8 |
| Journal | Frontiers in Chemistry |
| Language | English |
| Publisher Date | 2021-01-13 |
| Access Restriction | Open |
| Subject Keyword | Cathode materials Na2Fe0.6Mn0.4PO4F Spray drying Sodium-ion batteries Electrochemical performance |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry |
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