Synthesis and Performance of LiFePO<sub>4</sub>-C/Graphene Composite
LiFePO<sub>4</sub>-C/graphene composite was successfully prepared by a facile approach of grinding, ultrasonic dispersion, stirring and drying and used as the cathode material for lithium-ion batteries.The structure and morpholgy of as-prepared LiFePO<sub>4</sub>-C/graphene c...
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2018-04-01
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| Series: | Cailiao gongcheng |
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| Online Access: | http://jam.biam.ac.cn/CN/Y2018/V46/I4/43 |
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| author | NAN Wen-zheng YAN Shao-jiu PENG Si-kan ZHANG Xiao-yan LIU Da-bo DAI Sheng-long |
| author_facet | NAN Wen-zheng YAN Shao-jiu PENG Si-kan ZHANG Xiao-yan LIU Da-bo DAI Sheng-long |
| author_sort | NAN Wen-zheng |
| collection | DOAJ |
| description | LiFePO<sub>4</sub>-C/graphene composite was successfully prepared by a facile approach of grinding, ultrasonic dispersion, stirring and drying and used as the cathode material for lithium-ion batteries.The structure and morpholgy of as-prepared LiFePO<sub>4</sub>-C/graphene composite material was characterized with transmission electron microscopy,scanning electron microscopy, X-ray diffraction and Raman spectroscopy,and the electrochemical performance was tested using coin cells assembled in an argon-filled glovebox. SEM images show that in the as-prepared material, graphene nanoflakes are adhered on the surface of LiFePO<sub>4</sub>-C particles, and uniformly dispersed in the composite material forming an effective 3D conducting network. Electrochemical tests show that after adding 2% of graphene, rate and cycling performances of the LiFePO<sub>4</sub>-C/graphene composite material are obviously improved. For the rate performance, a high reversible capacity of 94.2mAh·g<sup>-1</sup> is achieved at 5C rate,which is more than 2.53 times higher than that of pristine LiFePO<sub>4</sub>-C; For cycling performance, the composite material shows a low capacity decay rate of 9.6% when cycles under 1C rate for 100 times,which is lower than pure LiFePO<sub>4</sub>-C (43.5%). The electrochemical performance enhancement can be mainly ascribed to the effective 3D conducting network formed by graphene nanoflakes with superior conductivity. |
| first_indexed | 2024-04-11T02:12:51Z |
| format | Article |
| id | doaj.art-68fbadb5fa6d4291aa8ca7edcd98fe1c |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T02:12:51Z |
| publishDate | 2018-04-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-68fbadb5fa6d4291aa8ca7edcd98fe1c2023-01-03T01:48:57ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812018-04-01464435010.11868/j.issn.1001-4381.2017.000826201804000826Synthesis and Performance of LiFePO<sub>4</sub>-C/Graphene CompositeNAN Wen-zheng0YAN Shao-jiu1PENG Si-kan2ZHANG Xiao-yan3LIU Da-bo4DAI Sheng-long5Research Center of Graphene Applications, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaResearch Center of Graphene Applications, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaResearch Center of Graphene Applications, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaResearch Center of Graphene Applications, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaResearch Center of Graphene Applications, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaResearch Center of Graphene Applications, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaLiFePO<sub>4</sub>-C/graphene composite was successfully prepared by a facile approach of grinding, ultrasonic dispersion, stirring and drying and used as the cathode material for lithium-ion batteries.The structure and morpholgy of as-prepared LiFePO<sub>4</sub>-C/graphene composite material was characterized with transmission electron microscopy,scanning electron microscopy, X-ray diffraction and Raman spectroscopy,and the electrochemical performance was tested using coin cells assembled in an argon-filled glovebox. SEM images show that in the as-prepared material, graphene nanoflakes are adhered on the surface of LiFePO<sub>4</sub>-C particles, and uniformly dispersed in the composite material forming an effective 3D conducting network. Electrochemical tests show that after adding 2% of graphene, rate and cycling performances of the LiFePO<sub>4</sub>-C/graphene composite material are obviously improved. For the rate performance, a high reversible capacity of 94.2mAh·g<sup>-1</sup> is achieved at 5C rate,which is more than 2.53 times higher than that of pristine LiFePO<sub>4</sub>-C; For cycling performance, the composite material shows a low capacity decay rate of 9.6% when cycles under 1C rate for 100 times,which is lower than pure LiFePO<sub>4</sub>-C (43.5%). The electrochemical performance enhancement can be mainly ascribed to the effective 3D conducting network formed by graphene nanoflakes with superior conductivity.http://jam.biam.ac.cn/CN/Y2018/V46/I4/43LiFePO<sub>4</sub>-C/graphene compositeelectrochemical performancerate performancecycling performance |
| spellingShingle | NAN Wen-zheng YAN Shao-jiu PENG Si-kan ZHANG Xiao-yan LIU Da-bo DAI Sheng-long Synthesis and Performance of LiFePO<sub>4</sub>-C/Graphene Composite Cailiao gongcheng LiFePO<sub>4</sub>-C/graphene composite electrochemical performance rate performance cycling performance |
| title | Synthesis and Performance of LiFePO<sub>4</sub>-C/Graphene Composite |
| title_full | Synthesis and Performance of LiFePO<sub>4</sub>-C/Graphene Composite |
| title_fullStr | Synthesis and Performance of LiFePO<sub>4</sub>-C/Graphene Composite |
| title_full_unstemmed | Synthesis and Performance of LiFePO<sub>4</sub>-C/Graphene Composite |
| title_short | Synthesis and Performance of LiFePO<sub>4</sub>-C/Graphene Composite |
| title_sort | synthesis and performance of lifepo sub 4 sub c graphene composite |
| topic | LiFePO<sub>4</sub>-C/graphene composite electrochemical performance rate performance cycling performance |
| url | http://jam.biam.ac.cn/CN/Y2018/V46/I4/43 |
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