Post-Synthetic and In Situ Vacancy Repairing of Iron Hexacyanoferrate Toward Highly Stable Cathodes for Sodium-Ion Batteries
Abstract Iron hexacyanoferrate (FeHCF) is a promising cathode material for sodium-ion batteries. However, FeHCF always suffers from a poor cycling stability, which is closely related to the abundant vacancy defects in its framework. Herein, post-synthetic and in-situ vacancy repairing strategies are...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-12-01
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| Series: | Nano-Micro Letters |
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| Online Access: | https://doi.org/10.1007/s40820-021-00742-z |
| _version_ | 1828957495099392000 |
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| author | Min Wan Rui Zeng Jingtao Meng Zexiao Cheng Weilun Chen Jiayu Peng Wuxing Zhang Yunhui Huang |
| author_facet | Min Wan Rui Zeng Jingtao Meng Zexiao Cheng Weilun Chen Jiayu Peng Wuxing Zhang Yunhui Huang |
| author_sort | Min Wan |
| collection | DOAJ |
| description | Abstract Iron hexacyanoferrate (FeHCF) is a promising cathode material for sodium-ion batteries. However, FeHCF always suffers from a poor cycling stability, which is closely related to the abundant vacancy defects in its framework. Herein, post-synthetic and in-situ vacancy repairing strategies are proposed for the synthesis of high-quality FeHCF in a highly concentrated Na4Fe(CN)6 solution. Both the post-synthetic and in-situ vacancy repaired FeHCF products (FeHCF-P and FeHCF-I) show the significant decrease in the number of vacancy defects and the reinforced structure, which can suppress the side reactions and activate the capacity from low-spin Fe in FeHCF. In particular, FeHCF-P delivers a reversible discharge capacity of 131 mAh g−1 at 1 C and remains 109 mAh g−1 after 500 cycles, with a capacity retention of 83%. FeHCF-I can deliver a high discharge capacity of 158.5 mAh g−1 at 1 C. Even at 10 C, the FeHCF-I electrode still maintains a discharge specific capacity of 103 mAh g−1 and retains 75% after 800 cycles. This work provides a new vacancy repairing strategy for the solution synthesis of high-quality FeHCF. |
| first_indexed | 2024-12-14T08:29:45Z |
| format | Article |
| id | doaj.art-008cc2505bc24205abf47b68a872ed3c |
| institution | Directory Open Access Journal |
| issn | 2311-6706 2150-5551 |
| language | English |
| last_indexed | 2024-12-14T08:29:45Z |
| publishDate | 2021-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nano-Micro Letters |
| spelling | doaj.art-008cc2505bc24205abf47b68a872ed3c2022-12-21T23:09:32ZengSpringerOpenNano-Micro Letters2311-67062150-55512021-12-0114111210.1007/s40820-021-00742-zPost-Synthetic and In Situ Vacancy Repairing of Iron Hexacyanoferrate Toward Highly Stable Cathodes for Sodium-Ion BatteriesMin Wan0Rui Zeng1Jingtao Meng2Zexiao Cheng3Weilun Chen4Jiayu Peng5Wuxing Zhang6Yunhui Huang7School of Mechanical Science and Engineering, Huazhong University of Science and TechnologySchool of Chemistry and Environmental Engineering, Wuhan Polytechnic UniversityState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and TechnologyState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and TechnologyState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and TechnologyState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and TechnologyState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and TechnologyState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and TechnologyAbstract Iron hexacyanoferrate (FeHCF) is a promising cathode material for sodium-ion batteries. However, FeHCF always suffers from a poor cycling stability, which is closely related to the abundant vacancy defects in its framework. Herein, post-synthetic and in-situ vacancy repairing strategies are proposed for the synthesis of high-quality FeHCF in a highly concentrated Na4Fe(CN)6 solution. Both the post-synthetic and in-situ vacancy repaired FeHCF products (FeHCF-P and FeHCF-I) show the significant decrease in the number of vacancy defects and the reinforced structure, which can suppress the side reactions and activate the capacity from low-spin Fe in FeHCF. In particular, FeHCF-P delivers a reversible discharge capacity of 131 mAh g−1 at 1 C and remains 109 mAh g−1 after 500 cycles, with a capacity retention of 83%. FeHCF-I can deliver a high discharge capacity of 158.5 mAh g−1 at 1 C. Even at 10 C, the FeHCF-I electrode still maintains a discharge specific capacity of 103 mAh g−1 and retains 75% after 800 cycles. This work provides a new vacancy repairing strategy for the solution synthesis of high-quality FeHCF.https://doi.org/10.1007/s40820-021-00742-zIron hexacyanoferrateCathodeVacancy repairingSodium-ion batteries |
| spellingShingle | Min Wan Rui Zeng Jingtao Meng Zexiao Cheng Weilun Chen Jiayu Peng Wuxing Zhang Yunhui Huang Post-Synthetic and In Situ Vacancy Repairing of Iron Hexacyanoferrate Toward Highly Stable Cathodes for Sodium-Ion Batteries Nano-Micro Letters Iron hexacyanoferrate Cathode Vacancy repairing Sodium-ion batteries |
| title | Post-Synthetic and In Situ Vacancy Repairing of Iron Hexacyanoferrate Toward Highly Stable Cathodes for Sodium-Ion Batteries |
| title_full | Post-Synthetic and In Situ Vacancy Repairing of Iron Hexacyanoferrate Toward Highly Stable Cathodes for Sodium-Ion Batteries |
| title_fullStr | Post-Synthetic and In Situ Vacancy Repairing of Iron Hexacyanoferrate Toward Highly Stable Cathodes for Sodium-Ion Batteries |
| title_full_unstemmed | Post-Synthetic and In Situ Vacancy Repairing of Iron Hexacyanoferrate Toward Highly Stable Cathodes for Sodium-Ion Batteries |
| title_short | Post-Synthetic and In Situ Vacancy Repairing of Iron Hexacyanoferrate Toward Highly Stable Cathodes for Sodium-Ion Batteries |
| title_sort | post synthetic and in situ vacancy repairing of iron hexacyanoferrate toward highly stable cathodes for sodium ion batteries |
| topic | Iron hexacyanoferrate Cathode Vacancy repairing Sodium-ion batteries |
| url | https://doi.org/10.1007/s40820-021-00742-z |
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