Improving the electrochemical performances of li-rich li1.20ni0.13co0.13mn0.54o2 through a cooperative doping of na+ and po43- with na3po4
文献类型：期刊论文
| 作者 | Liu, Yi1; Ning, De2; Zheng, Lirong3; Zhang, Qinghua4; Gu, Lin4; Gao, Rui1; Zhang, Jicheng1; Franz, Alexandra2; Schumacher, Gerhard2; Liu, Xiangfeng1 |
| 刊名 | Journal of power sources
 |
| 出版日期 | 2018-02-01 |
| 卷号 | 375页码:1-10 |
| 关键词 | Lithium-ion battery Li-rich layered oxide Cathode Co-doping Na3po4 |
| ISSN号 | 0378-7753 |
| DOI | 10.1016/j.ipowsour.2017.11.042 |
| 通讯作者 | Liu, xiangfeng(liuxf@ucas.ac.cn) |
| 英文摘要 | Li-rich layered oxide cathodes suffer from poor rate capability, voltage decay and inferior cycling stability. herein, we propose a novel synergistic strategy to improve the electrochemical performances of li-rich li1.20ni0.13co0.13mn0.54o2 by the co-doping of na+ and po43-. the co-doping of na+ for li and po43- for mn is simultaneously achieved using na3po4 as a dopant. the co-doping of na+ and po43- not only enhances the high-rate performance (106.4 mahg(-1)@10c) and capacity retention (93.8%@1c@100 cycles) but also mitigates the voltage decay owing to the synergistic effect of na+ and po43- co-doping. the synergistic mechanism is unraveled based on neutron diffraction, aberration-corrected scanning transmission electron microscope, x-ray photoelectron spectroscopy, ex-situ x-ray absorption spectra, ex-situ x-ray diffraction, electrochemical impedance spectroscopy and electrochemical measurements. the co-doping of na+ and po43- enlarges the interlayer spacing and suppresses li/ni mixing which increases li+ diffusivity and enhances the rate capability. meanwhile, the co-doping of na+ and po43- shrinks the thickness of the slabs, weakens the tm-o covalency and alleviates the volume change in the charge/discharge process which improves the layered structure stability and the cycling performances. this study presents some new insights into designing high performance cathode materials through a cooperative modulation of different crystal sites doping. |
| WOS关键词 | LITHIUM-ION BATTERIES ; ELECTRICAL ENERGY-STORAGE ; HIGH-RATE CAPABILITY ; CATHODE MATERIAL ; LAYERED OXIDES ; HIGH-CAPACITY ; CYCLING STABILITY ; ELECTRODES ; DIFFRACTION ; TRANSITION |
| WOS研究方向 | Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science |
| WOS类目 | Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000418463700001 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177803 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Liu, Xiangfeng |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100049, Peoples R China 2.Helmholtz Ctr Berlin Mat & Energy, Hahn Meitner Pl 1, D-14109 Berlin, Germany 3.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yi,Ning, De,Zheng, Lirong,et al. Improving the electrochemical performances of li-rich li1.20ni0.13co0.13mn0.54o2 through a cooperative doping of na+ and po43- with na3po4[J]. Journal of power sources,2018,375:1-10. |
| APA | Liu, Yi.,Ning, De.,Zheng, Lirong.,Zhang, Qinghua.,Gu, Lin.,...&Liu, Xiangfeng.(2018).Improving the electrochemical performances of li-rich li1.20ni0.13co0.13mn0.54o2 through a cooperative doping of na+ and po43- with na3po4.Journal of power sources,375,1-10. |
| MLA | Liu, Yi,et al."Improving the electrochemical performances of li-rich li1.20ni0.13co0.13mn0.54o2 through a cooperative doping of na+ and po43- with na3po4".Journal of power sources 375(2018):1-10. |
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来源：高能物理研究所
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