Engineering Heterostructured Fe-Co-P Arrays for Robust Sodium Storage
Transition metal phosphides attract extensive concerns thanks to their high theoretical capacity in sodium ion batteries (SIBs). Nevertheless, the substantial volume fluctuation of metal phosphides during cycling leads to severe capacity decay, which largely hinders their large-scale deployment. In...
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MDPI AG
2024-04-01
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| Online Access: | https://www.mdpi.com/1996-1944/17/7/1616 |
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| author | Zidi Xiao Lin Gao Shaohui Li |
| author_facet | Zidi Xiao Lin Gao Shaohui Li |
| author_sort | Zidi Xiao |
| collection | DOAJ |
| description | Transition metal phosphides attract extensive concerns thanks to their high theoretical capacity in sodium ion batteries (SIBs). Nevertheless, the substantial volume fluctuation of metal phosphides during cycling leads to severe capacity decay, which largely hinders their large-scale deployment. In this regard, heterostructured Fe-Co-P (FeP/Co<sub>2</sub>P) arrays are firstly constructed in this work for SIBs. The novel self-supported construction without insulated binders favors fast charge migration and Na<sup>+</sup> ion diffusion. In addition, the special heterostructure with abundant heterointerfaces could considerably mitigate the volume change during (de)sodiation and provide increased active sites for Na<sup>+</sup> ions. Density functional theoretical (DFT) calculations confirm the built-in electric field in the heterointerfaces, which greatly hastens charge transfer and Na<sup>+</sup> ion transportation, thereafter bringing about enhanced electrochemical performance. Most importantly, the FeP/Co<sub>2</sub>P heterostructure discloses higher electrical conductivity than that of bare FeP and Co<sub>2</sub>P based on the theoretical calculations. As anticipated, the heterostructured Fe-Co-P arrays demonstrate superior performance to that of Fe-P or Co-P anode, delivering high reversible capacities of 634 mAh g<sup>−1</sup> at 0.2 A g<sup>−1</sup> and 239 mAh g<sup>−1</sup> at 1 A g<sup>−1</sup> after 300 cycles. |
| first_indexed | 2024-04-24T10:40:00Z |
| format | Article |
| id | doaj.art-49f85c89f37e43a5889fe2678eb64d87 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-24T10:40:00Z |
| publishDate | 2024-04-01 |
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| spelling | doaj.art-49f85c89f37e43a5889fe2678eb64d872024-04-12T13:22:08ZengMDPI AGMaterials1996-19442024-04-01177161610.3390/ma17071616Engineering Heterostructured Fe-Co-P Arrays for Robust Sodium StorageZidi Xiao0Lin Gao1Shaohui Li2Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, ChinaHubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, ChinaSchool of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, ChinaTransition metal phosphides attract extensive concerns thanks to their high theoretical capacity in sodium ion batteries (SIBs). Nevertheless, the substantial volume fluctuation of metal phosphides during cycling leads to severe capacity decay, which largely hinders their large-scale deployment. In this regard, heterostructured Fe-Co-P (FeP/Co<sub>2</sub>P) arrays are firstly constructed in this work for SIBs. The novel self-supported construction without insulated binders favors fast charge migration and Na<sup>+</sup> ion diffusion. In addition, the special heterostructure with abundant heterointerfaces could considerably mitigate the volume change during (de)sodiation and provide increased active sites for Na<sup>+</sup> ions. Density functional theoretical (DFT) calculations confirm the built-in electric field in the heterointerfaces, which greatly hastens charge transfer and Na<sup>+</sup> ion transportation, thereafter bringing about enhanced electrochemical performance. Most importantly, the FeP/Co<sub>2</sub>P heterostructure discloses higher electrical conductivity than that of bare FeP and Co<sub>2</sub>P based on the theoretical calculations. As anticipated, the heterostructured Fe-Co-P arrays demonstrate superior performance to that of Fe-P or Co-P anode, delivering high reversible capacities of 634 mAh g<sup>−1</sup> at 0.2 A g<sup>−1</sup> and 239 mAh g<sup>−1</sup> at 1 A g<sup>−1</sup> after 300 cycles.https://www.mdpi.com/1996-1944/17/7/1616Fe-Co-P arrayssodium ion batteriesanode materialsheterostructureself-supported arrays |
| spellingShingle | Zidi Xiao Lin Gao Shaohui Li Engineering Heterostructured Fe-Co-P Arrays for Robust Sodium Storage Materials Fe-Co-P arrays sodium ion batteries anode materials heterostructure self-supported arrays |
| title | Engineering Heterostructured Fe-Co-P Arrays for Robust Sodium Storage |
| title_full | Engineering Heterostructured Fe-Co-P Arrays for Robust Sodium Storage |
| title_fullStr | Engineering Heterostructured Fe-Co-P Arrays for Robust Sodium Storage |
| title_full_unstemmed | Engineering Heterostructured Fe-Co-P Arrays for Robust Sodium Storage |
| title_short | Engineering Heterostructured Fe-Co-P Arrays for Robust Sodium Storage |
| title_sort | engineering heterostructured fe co p arrays for robust sodium storage |
| topic | Fe-Co-P arrays sodium ion batteries anode materials heterostructure self-supported arrays |
| url | https://www.mdpi.com/1996-1944/17/7/1616 |
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