In Situ Monitoring of Structural and Valence Evolution during Electrochemical Desodiation/Sodiation Process of Na2Fe0.5Mn0.5PO4F
文献类型：期刊论文
| 作者 | Xie, Y; Wang, HC; Liu, R; Wang, ZG; Wen, W; Jiang, Z; Gong, ZL; Yang, Y |
| 刊名 | JOURNAL OF THE ELECTROCHEMICAL SOCIETY
 |
| 出版日期 | 2017 |
| 卷号 | 164期号:14页码:A3487-A3492 |
| 关键词 | SODIUM-ION BATTERIES CATHODE MATERIAL ELECTRODE PERFORMANCE ROOM-TEMPERATURE ENERGY-STORAGE NA NA2FEPO4F NA2MNPO4F MN FE |
| ISSN号 | 0013-4651 |
| DOI | 10.1149/2.0281714jes |
| 文献子类 | 期刊论文 |
| 英文摘要 | Na2Fe0.5Mn0.5PO4F as a cathode material for Na ion batteries is synthesized by a solid-state method. Synchrotron based in situ X-ray absorption near edge structure (XANES) and X-ray diffraction (XRD) techniques are used to study the electronic and crystal structure evolutions of Na2Fe0.5Mn0.5PO4F, complemented by electrochemical analyses during the electrochemical sodiation/desodiation. A reversible capacity of 107 mAh/g can be obtained at 12.4 mA/g with two well-defined voltage plateaus centered at 2.9 and 3.5 V vs. Na/Na+. Clear edge shifts in the Fe and Mn K-edge XANES are observed for Na2Fe0.5Mn0.5PO4F at low current density (i.e., 8 mA/g), relating to the two plateaus in the charging curve associated with the Fe2+/Fe3+ and Mn2+/Mn3+ redox reactions sequentially. Increasing the charge current density to 100 mA/g, similar spectroscopic behavior is observed for Fe K-edge XANES. While, the Mn K-edge shift is smaller compared with this observed at 8 mA/g, indicating the sluggish reaction kinetic of Mn3+/Mn2+ redox couple. Continuous diffraction peaks shifts in in-situ XRD patterns of Na2Fe0.5Mn0.5PO4F are observed throughout the charge-discharge processwithout emergence of newpeaks, indicating of solid-solution processes. Na2Fe0.5Mn0.5PO4F shows good structural reversibility during the electrochemical sodiation/desodiation. (c) 2017 The Electrochemical Society. All rights reserved. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/30986]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Xiamen Univ, Coll Energy, Xiamen 361005, Peoples R China 2.Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surface, Xiamen 361005, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie, Y,Wang, HC,Liu, R,et al. In Situ Monitoring of Structural and Valence Evolution during Electrochemical Desodiation/Sodiation Process of Na2Fe0.5Mn0.5PO4F[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2017,164(14):A3487-A3492. |
| APA | Xie, Y.,Wang, HC.,Liu, R.,Wang, ZG.,Wen, W.,...&Yang, Y.(2017).In Situ Monitoring of Structural and Valence Evolution during Electrochemical Desodiation/Sodiation Process of Na2Fe0.5Mn0.5PO4F.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,164(14),A3487-A3492. |
| MLA | Xie, Y,et al."In Situ Monitoring of Structural and Valence Evolution during Electrochemical Desodiation/Sodiation Process of Na2Fe0.5Mn0.5PO4F".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 164.14(2017):A3487-A3492. |
入库方式： OAI收割
来源：上海应用物理研究所
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