Polymer-assisted spinodal decomposition enabling a three-dimensional interconnected porous Na3.4Fe2.4(PO4)1.4P2O7@C material for enhanced sodium-ion batteries
Abstract Na4Fe3(PO4)2P2O7 (NFPP), an Iron-based mixed polyanion phosphate, is regarded as a potential cathode material for sodium-ion batteries. However, the application is often constrained by the inherently sluggish Na+ diffusion and low electronic conductivity. Herein, we synthesized a 3D interco...
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Springer
2025-03-01
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| Series: | Discover Electrochemistry |
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| Online Access: | https://doi.org/10.1007/s44373-025-00023-z |
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| author | Nian Yang Ruiyuan Tian Fei Du |
| author_facet | Nian Yang Ruiyuan Tian Fei Du |
| author_sort | Nian Yang |
| collection | DOAJ |
| description | Abstract Na4Fe3(PO4)2P2O7 (NFPP), an Iron-based mixed polyanion phosphate, is regarded as a potential cathode material for sodium-ion batteries. However, the application is often constrained by the inherently sluggish Na+ diffusion and low electronic conductivity. Herein, we synthesized a 3D interconnected porous structural pure-phase nonstoichiometric Na3.4Fe2.4(PO4)1.4P2O7/carbon composite (3DP-NFPP@C). This was achieved through a straightforward polymer-assisted spinodal decomposition strategy, facilitated by the controlled evaporation of selective solvents during phase separation. As the interconnected porous structures provide fast ion diffusion channels, and the carbon coating enables enhanced electronic conductivity, the 3DP-NFPP@C composite exhibits an exceptional rate capability of 62.8 mAh g−1 at 100 C, nearly doubling the performance of the non-porous counterpart N-NFPP@C, which delivers 32.9 mAh g⁻1. Furthermore, it demonstrates a prolonged cycling life exceeding 8000 cycles, with a capacity retention of 91.5%. These findings offer valuable insights into the development of advanced cathode materials for high-performance sodium-ion batteries. |
| format | Article |
| id | doaj-art-b01affad6e7945408a6d23f4ea076a22 |
| institution | DOAJ |
| issn | 3005-1215 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Springer |
| record_format | Article |
| series | Discover Electrochemistry |
| spelling | doaj-art-b01affad6e7945408a6d23f4ea076a222025-08-20T03:08:09ZengSpringerDiscover Electrochemistry3005-12152025-03-012111010.1007/s44373-025-00023-zPolymer-assisted spinodal decomposition enabling a three-dimensional interconnected porous Na3.4Fe2.4(PO4)1.4P2O7@C material for enhanced sodium-ion batteriesNian Yang0Ruiyuan Tian1Fei Du2Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), State Key Laboratory of Superhard Materials, College of Physics, Jilin UniversityKey Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), State Key Laboratory of Superhard Materials, College of Physics, Jilin UniversityKey Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), State Key Laboratory of Superhard Materials, College of Physics, Jilin UniversityAbstract Na4Fe3(PO4)2P2O7 (NFPP), an Iron-based mixed polyanion phosphate, is regarded as a potential cathode material for sodium-ion batteries. However, the application is often constrained by the inherently sluggish Na+ diffusion and low electronic conductivity. Herein, we synthesized a 3D interconnected porous structural pure-phase nonstoichiometric Na3.4Fe2.4(PO4)1.4P2O7/carbon composite (3DP-NFPP@C). This was achieved through a straightforward polymer-assisted spinodal decomposition strategy, facilitated by the controlled evaporation of selective solvents during phase separation. As the interconnected porous structures provide fast ion diffusion channels, and the carbon coating enables enhanced electronic conductivity, the 3DP-NFPP@C composite exhibits an exceptional rate capability of 62.8 mAh g−1 at 100 C, nearly doubling the performance of the non-porous counterpart N-NFPP@C, which delivers 32.9 mAh g⁻1. Furthermore, it demonstrates a prolonged cycling life exceeding 8000 cycles, with a capacity retention of 91.5%. These findings offer valuable insights into the development of advanced cathode materials for high-performance sodium-ion batteries.https://doi.org/10.1007/s44373-025-00023-zSodium ion batteriesIron-based polyanion materialsSpinodal decomposition3D interconnected porous structure |
| spellingShingle | Nian Yang Ruiyuan Tian Fei Du Polymer-assisted spinodal decomposition enabling a three-dimensional interconnected porous Na3.4Fe2.4(PO4)1.4P2O7@C material for enhanced sodium-ion batteries Discover Electrochemistry Sodium ion batteries Iron-based polyanion materials Spinodal decomposition 3D interconnected porous structure |
| title | Polymer-assisted spinodal decomposition enabling a three-dimensional interconnected porous Na3.4Fe2.4(PO4)1.4P2O7@C material for enhanced sodium-ion batteries |
| title_full | Polymer-assisted spinodal decomposition enabling a three-dimensional interconnected porous Na3.4Fe2.4(PO4)1.4P2O7@C material for enhanced sodium-ion batteries |
| title_fullStr | Polymer-assisted spinodal decomposition enabling a three-dimensional interconnected porous Na3.4Fe2.4(PO4)1.4P2O7@C material for enhanced sodium-ion batteries |
| title_full_unstemmed | Polymer-assisted spinodal decomposition enabling a three-dimensional interconnected porous Na3.4Fe2.4(PO4)1.4P2O7@C material for enhanced sodium-ion batteries |
| title_short | Polymer-assisted spinodal decomposition enabling a three-dimensional interconnected porous Na3.4Fe2.4(PO4)1.4P2O7@C material for enhanced sodium-ion batteries |
| title_sort | polymer assisted spinodal decomposition enabling a three dimensional interconnected porous na3 4fe2 4 po4 1 4p2o7 c material for enhanced sodium ion batteries |
| topic | Sodium ion batteries Iron-based polyanion materials Spinodal decomposition 3D interconnected porous structure |
| url | https://doi.org/10.1007/s44373-025-00023-z |
| work_keys_str_mv | AT nianyang polymerassistedspinodaldecompositionenablingathreedimensionalinterconnectedporousna34fe24po414p2o7cmaterialforenhancedsodiumionbatteries AT ruiyuantian polymerassistedspinodaldecompositionenablingathreedimensionalinterconnectedporousna34fe24po414p2o7cmaterialforenhancedsodiumionbatteries AT feidu polymerassistedspinodaldecompositionenablingathreedimensionalinterconnectedporousna34fe24po414p2o7cmaterialforenhancedsodiumionbatteries |