How inactive d(0) transition metal controls anionic redox in disordered Li-rich oxyfluoride cathodes
文献类型：期刊论文
| 作者 | Li, YN; Zhao, XL; Bao, QS; Cui, MN; Qiu, WJ; Liu, JJ |
| 刊名 | ENERGY STORAGE MATERIALS
 |
| 出版日期 | 2020-11-01 |
| 页码 | 253 |
| ISSN号 | 2405-8297 |
| DOI | 10.1016/j.ensm.2020.07.013 |
| 文献子类 | Article |
| 英文摘要 | The disordered Li-rich oxyfluoride cathodes not only offer potentials for high energy density through cooperative cationic and anionic redox but also for facile lithium diffusion by formatting activated percolating channels. Generally, the d(0) transition metals (TM) are considered as an essential facilitator for stabilization of the cation-disordered phase, but no redox activity. Nevertheless, their influence on reversible cationic and anionic redox is not fully understood, and consequently preventing further material design. Here, our studies for typical material Li2Mn1/2Ti1/2O2F unequivocally demonstrate that the local configurations containing redox-inactive d(0) TM make more contribution to reversible capacity than those containing electrochemically active Mn2+. The peculiar effect is attributed to forming low-energy charge-ordering state that d(0) TM prefers staying with Li-O-Li and pushes down O 2p unbonding state into a low-energy level. The present study reveals that a disordered oxyfluoride cathode design achieving a high reversible capacity may necessarily consider a suitable ratio of active low-charge TM to high-charge d(0) TM. |
| WOS关键词 | LITHIUM BATTERIES ; CAPACITY ; OXIDE ; BOTTLENECKS ; STABILITY ; EVOLUTION |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27640]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Li, YN,Zhao, XL,Bao, QS,et al. How inactive d(0) transition metal controls anionic redox in disordered Li-rich oxyfluoride cathodes[J]. ENERGY STORAGE MATERIALS,2020:253. |
| APA | Li, YN,Zhao, XL,Bao, QS,Cui, MN,Qiu, WJ,&Liu, JJ.(2020).How inactive d(0) transition metal controls anionic redox in disordered Li-rich oxyfluoride cathodes.ENERGY STORAGE MATERIALS,253. |
| MLA | Li, YN,et al."How inactive d(0) transition metal controls anionic redox in disordered Li-rich oxyfluoride cathodes".ENERGY STORAGE MATERIALS (2020):253. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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