Towards improved structural stability and electrochemical properties of a Li-rich material by a strategy of double gradient surface modification
文献类型：期刊论文
| 作者 | Ding, Xiang; Li, Yi-Xuan; Wang, Shuo; Dong, Jie-Min; Yasmin, Aqsa; Hu, Qiao; Wen, Zhao-Yin; Chen, Chun-Hua |
| 刊名 | NANO ENERGY
 |
| 出版日期 | 2019-07-01 |
| 卷号 | 61页码:411 |
| 关键词 | Li-rich cathode Sodium fluoride Double gradient Interface Long-cycle life |
| ISSN号 | 2211-2855 |
| DOI | 10.1016/j.nanoen.2019.04.078 |
| 文献子类 | Article |
| 英文摘要 | The electrochemical properties of layered Li-rich oxide Li1.2Ni0.13Co0.13Mn0.54O2 (LLO) can be enhanced by a facile NaF surface modification. We have clarified by XPS, HR-TEM and HAADF-STEM analyses that the mechanism is the formations of a gradient coating layer Na1-xLixF and a gradient LLO surface Li1.2-xNaxNi0.13Co0.13Mn0.54O2 via a Li+/Na+ exchange reaction. The exchange reaction occurs at the Li-slabs of LLO down to a depth of less than 15 nm. After such a double gradient surface modification, the LLO displays markedly improved cycle life and rate capability as well as suppressed voltage decay. It exhibits a capacity retention of 85% beyond 1000 cycles at 10 C and a voltage decay of only 0.0021 V per cycle at 0.5 C, revealing great application prospects in energy storage materials. |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27012]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Ding, Xiang,Li, Yi-Xuan,Wang, Shuo,et al. Towards improved structural stability and electrochemical properties of a Li-rich material by a strategy of double gradient surface modification[J]. NANO ENERGY,2019,61:411. |
| APA | Ding, Xiang.,Li, Yi-Xuan.,Wang, Shuo.,Dong, Jie-Min.,Yasmin, Aqsa.,...&Chen, Chun-Hua.(2019).Towards improved structural stability and electrochemical properties of a Li-rich material by a strategy of double gradient surface modification.NANO ENERGY,61,411. |
| MLA | Ding, Xiang,et al."Towards improved structural stability and electrochemical properties of a Li-rich material by a strategy of double gradient surface modification".NANO ENERGY 61(2019):411. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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