Tuning anionic redox activity to boost high-performance sodium-storage in low-cost Na0.67Fe0.5Mn0.5O2 cathode
文献类型：期刊论文
| ; | |
| 作者 | Jiao J.; Wu K.; Li N.; Zhao E.; Yin W. ; Hu Z.; Wang F.; Zhao J.; Xiao X.
|
| 刊名 | Journal of Energy Chemistry
 ; Journal of Energy Chemistry
|
| 出版日期 | 2022 ; 2022 |
| 卷号 | 73页码:214-222 |
| ISSN号 | 20954956 ; 20954956 |
| DOI | 10.1016/j.jechem.2022.04.042 ; 10.1016/j.jechem.2022.04.042 |
| 文献子类 | Article ; Article |
| 英文摘要 | Na-based layered iron-manganese oxide Na0.67Fe0.5Mn0.5O2 containing only low-cost elements is a promising cathode for Na-ion batteries used in large-scale energy storage systems. However, the poor cycle stability restricts its practical application. The capacity decay of Na0.67Fe0.5Mn0.5O2 mainly originates from the irreversible anionic redox reaction charge compensation due to the high-level hybridization between oxygen and iron. Herein, we rationally design a surface Ti doping strategy to tune the anionic redox reaction activity of Na0.67Fe0.5Mn0.5O2 and improve its Na-storage properties. The doped Ti ions not only enlarge the Na migration spacing layer but also improve the structure stability thanks to the strong Ti–O bond. More importantly, the d0-shell electronic structure of Ti4+ can suppress the charge transfer from the oxidized anions to cations, thus reducing the anionic redox reaction activity and enhancing the reversibility of charge compensation. The modified Na0.67Fe0.5Mn0.5O2 cathode shows a reversible capacity of 198 mA h g−1 and an increased capacity retention from 15% to 73% after about 1 month of cycling. Meanwhile, a superior Na-ion diffusion kinetics and rate capability are also observed. This work advances the commercialization process of Na-based layered iron-manganese oxide cathodes; on the other hand, the proposed modification strategy paves the way for the design of high-performance electrode materials relying on anionic redox reactions. © 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences; Na-based layered iron-manganese oxide Na0.67Fe0.5Mn0.5O2 containing only low-cost elements is a promising cathode for Na-ion batteries used in large-scale energy storage systems. However, the poor cycle stability restricts its practical application. The capacity decay of Na0.67Fe0.5Mn0.5O2 mainly originates from the irreversible anionic redox reaction charge compensation due to the high-level hybridization between oxygen and iron. Herein, we rationally design a surface Ti doping strategy to tune the anionic redox reaction activity of Na0.67Fe0.5Mn0.5O2 and improve its Na-storage properties. The doped Ti ions not only enlarge the Na migration spacing layer but also improve the structure stability thanks to the strong Ti–O bond. More importantly, the d0-shell electronic structure of Ti4+ can suppress the charge transfer from the oxidized anions to cations, thus reducing the anionic redox reaction activity and enhancing the reversibility of charge compensation. The modified Na0.67Fe0.5Mn0.5O2 cathode shows a reversible capacity of 198 mA h g−1 and an increased capacity retention from 15% to 73% after about 1 month of cycling. Meanwhile, a superior Na-ion diffusion kinetics and rate capability are also observed. This work advances the commercialization process of Na-based layered iron-manganese oxide cathodes; on the other hand, the proposed modification strategy paves the way for the design of high-performance electrode materials relying on anionic redox reactions. © 2022 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences |
| 语种 | 英语 ; 英语 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299627]  |
| 专题 | 高能物理研究所_东莞分部 高能物理研究所_实验物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Jiao J.,Wu K.,Li N.,et al. Tuning anionic redox activity to boost high-performance sodium-storage in low-cost Na0.67Fe0.5Mn0.5O2 cathode, Tuning anionic redox activity to boost high-performance sodium-storage in low-cost Na0.67Fe0.5Mn0.5O2 cathode[J]. Journal of Energy Chemistry, Journal of Energy Chemistry,2022, 2022,73, 73:214-222, 214-222. |
| APA | Jiao J..,Wu K..,Li N..,Zhao E..,Yin W..,...&Xiao X..(2022).Tuning anionic redox activity to boost high-performance sodium-storage in low-cost Na0.67Fe0.5Mn0.5O2 cathode.Journal of Energy Chemistry,73,214-222. |
| MLA | Jiao J.,et al."Tuning anionic redox activity to boost high-performance sodium-storage in low-cost Na0.67Fe0.5Mn0.5O2 cathode".Journal of Energy Chemistry 73(2022):214-222. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。