Mixed crystal FeFx submicron spheres loaded on fluorinated graphene as cathode materials for Lithium-Ion batteries
Iron fluoride (FeF3 and FeF2) is a potential candidate for the next generation of lithium-ion battery (LIBs) cathode materials due to their high theoretical specific capacity and low cost. However, previous studies have reported that the poor conductivity of FeF3 and FeF2 prevents their theoretical...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Online Access: | https://hdl.handle.net/10356/180172 |
| _version_ | 1811694858479337472 |
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| author | Qu, Jianying Ren, Zejia Yan, Lei Zhu, Yucheng Hu, Jun Tang, Yuxin Chen, Zhong |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Qu, Jianying Ren, Zejia Yan, Lei Zhu, Yucheng Hu, Jun Tang, Yuxin Chen, Zhong |
| author_sort | Qu, Jianying |
| collection | NTU |
| description | Iron fluoride (FeF3 and FeF2) is a potential candidate for the next generation of lithium-ion battery (LIBs) cathode materials due to their high theoretical specific capacity and low cost. However, previous studies have reported that the poor conductivity of FeF3 and FeF2 prevents their theoretical specific capacity from being effectively realized. Herein, fluorinated graphene loaded FeFx (FeFx@FG) submicron sphere was synthesized using graphene oxide and utilized as cathode materials for LIBs. Characterization by X-ray diffraction and transmission electron microscopy confirmed that the synthesized FeFx (x = 2 and 3) contains mixed FeF3 and FeF2crystals. The mixed crystal structure enables the FeFx@FG submicron sphere composite to display two steps in the electrochemical reaction when FeF3 and FeF2 discharge cooperatively, leading to excellent discharge performance. In addition, since the FG prepared by acid thermal method has good conductivity, it can significantly improve the FeFx conductivity and specific capacity when being connected to FG via C-F bond. The electrochemical tests show that the initial discharge capacity of FeFx@FG is as high as 394.24 mAh/g at the rate of 0.2C in the range of 1.5–4.0 V at 25 °C and display an excellent discharge capacity retention rate after the first discharge process, showing great potential of the mixed crystalline iron fluoride cathode in the field of lithium-ion batteries. |
| first_indexed | 2024-10-01T07:14:15Z |
| format | Journal Article |
| id | ntu-10356/180172 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:14:15Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1801722024-09-23T02:22:10Z Mixed crystal FeFx submicron spheres loaded on fluorinated graphene as cathode materials for Lithium-Ion batteries Qu, Jianying Ren, Zejia Yan, Lei Zhu, Yucheng Hu, Jun Tang, Yuxin Chen, Zhong School of Materials Science and Engineering Engineering Lithium-ion batteries Cathode material Iron fluoride (FeF3 and FeF2) is a potential candidate for the next generation of lithium-ion battery (LIBs) cathode materials due to their high theoretical specific capacity and low cost. However, previous studies have reported that the poor conductivity of FeF3 and FeF2 prevents their theoretical specific capacity from being effectively realized. Herein, fluorinated graphene loaded FeFx (FeFx@FG) submicron sphere was synthesized using graphene oxide and utilized as cathode materials for LIBs. Characterization by X-ray diffraction and transmission electron microscopy confirmed that the synthesized FeFx (x = 2 and 3) contains mixed FeF3 and FeF2crystals. The mixed crystal structure enables the FeFx@FG submicron sphere composite to display two steps in the electrochemical reaction when FeF3 and FeF2 discharge cooperatively, leading to excellent discharge performance. In addition, since the FG prepared by acid thermal method has good conductivity, it can significantly improve the FeFx conductivity and specific capacity when being connected to FG via C-F bond. The electrochemical tests show that the initial discharge capacity of FeFx@FG is as high as 394.24 mAh/g at the rate of 0.2C in the range of 1.5–4.0 V at 25 °C and display an excellent discharge capacity retention rate after the first discharge process, showing great potential of the mixed crystalline iron fluoride cathode in the field of lithium-ion batteries. Financial support from the National Natural Science Foundation of China (No. 21676216, 22075046, 51972063), Natural Science Funds for Distinguished Young Scholar of Fujian Province (2020 J06038), Special project of Shaanxi Provincial Education Department, China (20JC034), Basic research program of Natural Science in Shaanxi Province, China (2024JC-JCQN-19, 2019JM-294) are gratefully acknowledged. 2024-09-23T02:22:10Z 2024-09-23T02:22:10Z 2024 Journal Article Qu, J., Ren, Z., Yan, L., Zhu, Y., Hu, J., Tang, Y. & Chen, Z. (2024). Mixed crystal FeFx submicron spheres loaded on fluorinated graphene as cathode materials for Lithium-Ion batteries. Journal of Electroanalytical Chemistry, 960, 118195-. https://dx.doi.org/10.1016/j.jelechem.2024.118195 1572-6657 https://hdl.handle.net/10356/180172 10.1016/j.jelechem.2024.118195 2-s2.0-85188084700 960 118195 en Journal of Electroanalytical Chemistry © 2024 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering Lithium-ion batteries Cathode material Qu, Jianying Ren, Zejia Yan, Lei Zhu, Yucheng Hu, Jun Tang, Yuxin Chen, Zhong Mixed crystal FeFx submicron spheres loaded on fluorinated graphene as cathode materials for Lithium-Ion batteries |
| title | Mixed crystal FeFx submicron spheres loaded on fluorinated graphene as cathode materials for Lithium-Ion batteries |
| title_full | Mixed crystal FeFx submicron spheres loaded on fluorinated graphene as cathode materials for Lithium-Ion batteries |
| title_fullStr | Mixed crystal FeFx submicron spheres loaded on fluorinated graphene as cathode materials for Lithium-Ion batteries |
| title_full_unstemmed | Mixed crystal FeFx submicron spheres loaded on fluorinated graphene as cathode materials for Lithium-Ion batteries |
| title_short | Mixed crystal FeFx submicron spheres loaded on fluorinated graphene as cathode materials for Lithium-Ion batteries |
| title_sort | mixed crystal fefx submicron spheres loaded on fluorinated graphene as cathode materials for lithium ion batteries |
| topic | Engineering Lithium-ion batteries Cathode material |
| url | https://hdl.handle.net/10356/180172 |
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