Preparation of graphene based on liquid phase exfoliation and its application on LiFePO<sub>4</sub> electrode for lithium ion battery
High-crystallinity and low-defect graphene nanosheets with nano pores were prepared from natural flake graphite <i>via</i> high-pressure homogenization liquid phase exfoliation method.The morphology and structure of as-prepared samples were investigated with scanning electron microscopy,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2020-11-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.001162 |
| _version_ | 1797972425608003584 |
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| author | NAN Wen-zheng YAN Shao-jiu PENG Si-kan WANG Chen WANG Ji-xian |
| author_facet | NAN Wen-zheng YAN Shao-jiu PENG Si-kan WANG Chen WANG Ji-xian |
| author_sort | NAN Wen-zheng |
| collection | DOAJ |
| description | High-crystallinity and low-defect graphene nanosheets with nano pores were prepared from natural flake graphite <i>via</i> high-pressure homogenization liquid phase exfoliation method.The morphology and structure of as-prepared samples were investigated with scanning electron microscopy,transmission electron microscopy, atomic force microscope, X-ray diffraction and Raman spectroscopy.The electrochemical performance was performed using coin cells assembled in an argon-filled glovebox.It was found that the wrinkled graphene sheets with nanoholes consisted of 5 layers,which had high crystallinity.As conductive additives for LiFePO<sub>4</sub> cathode,graphene constructed fast pathway for electron and ion transport in the bulk electrode,resulting in superior rate performance.Electrochemical tests showed that the electrode achieved a high reversible capacity of 90 mAh/g at 10 C rate;in addition,the discharge capacity achieved 90 mAh/g when charging and discharging at 5 C rate for 200 cycles,maintaining 100% capacity retention.The approach preparing graphene is facile,which can be suitable for industrial scale production of graphene materials. |
| first_indexed | 2024-04-11T03:48:14Z |
| format | Article |
| id | doaj.art-0bdad5fa8d164fc8a8c0193c939ccccd |
| institution | Directory Open Access Journal |
| issn | 1001-4381 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T03:48:14Z |
| publishDate | 2020-11-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-0bdad5fa8d164fc8a8c0193c939ccccd2023-01-02T02:21:52ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812020-11-01481110811510.11868/j.issn.1001-4381.2019.00116220201113Preparation of graphene based on liquid phase exfoliation and its application on LiFePO<sub>4</sub> electrode for lithium ion batteryNAN Wen-zheng0YAN Shao-jiu1PENG Si-kan2WANG Chen3WANG Ji-xian4Beijing Institute of Graphene Technology Co., Ltd., AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaBeijing Institute of Graphene Technology Co., Ltd., AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaBeijing Institute of Graphene Technology Co., Ltd., AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaBeijing Institute of Graphene Technology Co., Ltd., AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaBeijing Institute of Graphene Technology Co., Ltd., AECC Beijing Institute of Aeronautical Materials, Beijing 100095, ChinaHigh-crystallinity and low-defect graphene nanosheets with nano pores were prepared from natural flake graphite <i>via</i> high-pressure homogenization liquid phase exfoliation method.The morphology and structure of as-prepared samples were investigated with scanning electron microscopy,transmission electron microscopy, atomic force microscope, X-ray diffraction and Raman spectroscopy.The electrochemical performance was performed using coin cells assembled in an argon-filled glovebox.It was found that the wrinkled graphene sheets with nanoholes consisted of 5 layers,which had high crystallinity.As conductive additives for LiFePO<sub>4</sub> cathode,graphene constructed fast pathway for electron and ion transport in the bulk electrode,resulting in superior rate performance.Electrochemical tests showed that the electrode achieved a high reversible capacity of 90 mAh/g at 10 C rate;in addition,the discharge capacity achieved 90 mAh/g when charging and discharging at 5 C rate for 200 cycles,maintaining 100% capacity retention.The approach preparing graphene is facile,which can be suitable for industrial scale production of graphene materials.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.001162liquid phase exfoliationgrapheneconductive additiverate performance |
| spellingShingle | NAN Wen-zheng YAN Shao-jiu PENG Si-kan WANG Chen WANG Ji-xian Preparation of graphene based on liquid phase exfoliation and its application on LiFePO<sub>4</sub> electrode for lithium ion battery Cailiao gongcheng liquid phase exfoliation graphene conductive additive rate performance |
| title | Preparation of graphene based on liquid phase exfoliation and its application on LiFePO<sub>4</sub> electrode for lithium ion battery |
| title_full | Preparation of graphene based on liquid phase exfoliation and its application on LiFePO<sub>4</sub> electrode for lithium ion battery |
| title_fullStr | Preparation of graphene based on liquid phase exfoliation and its application on LiFePO<sub>4</sub> electrode for lithium ion battery |
| title_full_unstemmed | Preparation of graphene based on liquid phase exfoliation and its application on LiFePO<sub>4</sub> electrode for lithium ion battery |
| title_short | Preparation of graphene based on liquid phase exfoliation and its application on LiFePO<sub>4</sub> electrode for lithium ion battery |
| title_sort | preparation of graphene based on liquid phase exfoliation and its application on lifepo sub 4 sub electrode for lithium ion battery |
| topic | liquid phase exfoliation graphene conductive additive rate performance |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.001162 |
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