Controllable synthesis of N-C@LiFePO4 nanospheres as advanced cathode of lithium ion batteries
| Autor: | Hongzhong Chi, S.Y. Liu, Xiaojing Teng, Zhenguo Ji, Xiaoxiao Lu, Qinqin Xiong, Jingjing Lou |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Chemical substance Mechanical Engineering Metals and Alloys 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode 0104 chemical sciences Ion law.invention Polymerization Chemical engineering Coating Mechanics of Materials law Electrode Materials Chemistry engineering 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | Journal of Alloys and Compounds. 743:377-382 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.01.350 |
| Popis: | Exploring advanced cathode materials is critical for the development of large-scale lithium ion storage. Herein we report nitrogen-doped carbon (N-C) coated LiFePO4 nanospheres (N-C@LFP) synthesized by a facile hydrothermal plus chemical polymerization method. N-C@LFP nanospsheres exhibit diameters of 400–700 nm and show core-shell structure with a thin N-C layer of ∼2.5 nm. As a cathode for lithium ion batteries (LIBs), N-C@LFP nanospheres present excellent electrochemical performance with higher electrochemical reactivity, better reversibility and smaller polarization as compared to the unmodified pristine LiFePO4 nanospheres. The N-C@LFP electrode delivers superior specific capacity of 158.4 mAh g−1 after 200 cycles at 1 C and good rate capability (107.5 mAh g−1 at 30 C). The enhanced electrochemical performance is attributed to the conductive N-C layer coating with fast ion/electron transfer. The N-C@LFP nanospheres are thus promising for commercial application in high-energy & power LIBs. |
| Databáze: | OpenAIRE |
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