| Improving the electrochemical performances of Li-rich Li1.20Ni0.13Co0.13Mn0.54O2 through a cooperative doping of Na+ and PO43- with Na3PO4 | |
Liu, Y; Ning, D; Zheng, LR ; Zhang, QH; Gu, L; Gao, R; Zhang, JC; Franz, A; Schumacher, G; Liu, XF; Zheng LR(郑黎荣)
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| 2018 | |
| Source Publication | JOURNAL OF POWER SOURCES
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| ISSN | 0378-7753 |
| EISSN | 1873-2755 |
| Volume | 375Pages:1-10 |
| Subtype | Article |
| Abstract | 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. |
| Keyword | Lithium-ion battery Li-rich layered oxide Cathode Co-doping Na3PO4 |
| DOI | 10.1016/j.jpowsour.2017.11.042 |
| WOS Keyword | LITHIUM-ION BATTERIES ; ELECTRICAL ENERGY-STORAGE ; HIGH-RATE CAPABILITY ; CATHODE MATERIAL ; LAYERED OXIDES ; HIGH-CAPACITY ; CYCLING STABILITY ; ELECTRODES ; DIFFRACTION ; TRANSITION |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS Research Area | Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science |
| WOS Subject | Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000418463700001 |
| EI Accession Number | 20174704433549 |
| ADS Bibcode | 2018JPS...375....1L |
| Citation statistics |
Cited Times:12 [ADS]
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| Document Type | 期刊论文 |
| Identifier | http://ir.ihep.ac.cn/handle/311005/285511 |
| Collection | 多学科研究中心 |
| Affiliation | 中国科学院高能物理研究所 |
| First Author Affilication | Institute of High Energy |
| Recommended Citation GB/T 7714 | Liu, Y,Ning, D,Zheng, LR,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, Y.,Ning, D.,Zheng, LR.,Zhang, QH.,Gu, L.,...&郑黎荣.(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, Y,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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