Potassium-pillared Na4FeV(PO4)3@C cathode for high-performance sodium-ion batteries
Due to the open 3D framework structure and relative high capacity, the NASICON type Na3V2(PO4)3 has aroused enormous attention as the cathode material for sodium-ion batteries. However, it still suffers from the toxicity and high cost of vanadium elements, coupled with low electronic conductivity. I...
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Elsevier
2025-04-01
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| Series: | Electrochemistry Communications |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248125000220 |
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| author | Jiafeng Zhou Wei Zhang Jin Bai Qingqing Wang Bo Ding Hao Gong |
| author_facet | Jiafeng Zhou Wei Zhang Jin Bai Qingqing Wang Bo Ding Hao Gong |
| author_sort | Jiafeng Zhou |
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| description | Due to the open 3D framework structure and relative high capacity, the NASICON type Na3V2(PO4)3 has aroused enormous attention as the cathode material for sodium-ion batteries. However, it still suffers from the toxicity and high cost of vanadium elements, coupled with low electronic conductivity. In this study, we partially substituted V with the environmentally friendly and cost-effective transition element Fe and doped K into the Na site to fabricate a series of Na4-xKxFeV(PO4)3@C composites using a facile sol-gel method. The structural stability, Na+ mobility and electronic conductivity can significant improved by replacing Na+ with K+ and applying a carbon coating. Consequently, the Na3.9K0.1FeV(PO4)3@C electrode delivers a reversible discharge capacity of 83.85 mAh g−1 at 5C after 3000 cycles, with a capacity retention of 91.7 %. It also exhibits an outstanding rate performance with a specific discharge capacity of 83.88 mAh g−1 even at 20.0C. The kinetic analyses and ex-situ characterizations confirm that a small volume change, the pseudocapacitive- dominated sodium storage behavior and highly reversible redox reaction (Fe2+/3+ and V3+/4+) occur during the electrochemical reaction process. Finally, the optimized K-doped NFVP cathode also demonstrates great potential in practical utilization through the evaluation of electrochemical performance for full cells. |
| format | Article |
| id | doaj-art-ea0e1135ddb843519dae7700780f5355 |
| institution | Kabale University |
| issn | 1388-2481 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
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| series | Electrochemistry Communications |
| spelling | doaj-art-ea0e1135ddb843519dae7700780f53552025-02-10T04:34:16ZengElsevierElectrochemistry Communications1388-24812025-04-01173107883Potassium-pillared Na4FeV(PO4)3@C cathode for high-performance sodium-ion batteriesJiafeng Zhou0Wei Zhang1Jin Bai2Qingqing Wang3Bo Ding4Hao Gong5School of Mathematics and Physics, Bengbu University, Bengbu 233000, China; Corresponding author.School of Mathematics and Physics, Bengbu University, Bengbu 233000, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaSchool of Mathematics and Physics, Bengbu University, Bengbu 233000, ChinaSchool of Materials Chemistry and Engineering, Bengbu University, Bengbu 233000, ChinaSchool of Mathematics and Physics, Bengbu University, Bengbu 233000, ChinaDue to the open 3D framework structure and relative high capacity, the NASICON type Na3V2(PO4)3 has aroused enormous attention as the cathode material for sodium-ion batteries. However, it still suffers from the toxicity and high cost of vanadium elements, coupled with low electronic conductivity. In this study, we partially substituted V with the environmentally friendly and cost-effective transition element Fe and doped K into the Na site to fabricate a series of Na4-xKxFeV(PO4)3@C composites using a facile sol-gel method. The structural stability, Na+ mobility and electronic conductivity can significant improved by replacing Na+ with K+ and applying a carbon coating. Consequently, the Na3.9K0.1FeV(PO4)3@C electrode delivers a reversible discharge capacity of 83.85 mAh g−1 at 5C after 3000 cycles, with a capacity retention of 91.7 %. It also exhibits an outstanding rate performance with a specific discharge capacity of 83.88 mAh g−1 even at 20.0C. The kinetic analyses and ex-situ characterizations confirm that a small volume change, the pseudocapacitive- dominated sodium storage behavior and highly reversible redox reaction (Fe2+/3+ and V3+/4+) occur during the electrochemical reaction process. Finally, the optimized K-doped NFVP cathode also demonstrates great potential in practical utilization through the evaluation of electrochemical performance for full cells.http://www.sciencedirect.com/science/article/pii/S1388248125000220Na4FeV(PO4)3NASICON structureSodium-ion batteriesCathode materials |
| spellingShingle | Jiafeng Zhou Wei Zhang Jin Bai Qingqing Wang Bo Ding Hao Gong Potassium-pillared Na4FeV(PO4)3@C cathode for high-performance sodium-ion batteries Electrochemistry Communications Na4FeV(PO4)3 NASICON structure Sodium-ion batteries Cathode materials |
| title | Potassium-pillared Na4FeV(PO4)3@C cathode for high-performance sodium-ion batteries |
| title_full | Potassium-pillared Na4FeV(PO4)3@C cathode for high-performance sodium-ion batteries |
| title_fullStr | Potassium-pillared Na4FeV(PO4)3@C cathode for high-performance sodium-ion batteries |
| title_full_unstemmed | Potassium-pillared Na4FeV(PO4)3@C cathode for high-performance sodium-ion batteries |
| title_short | Potassium-pillared Na4FeV(PO4)3@C cathode for high-performance sodium-ion batteries |
| title_sort | potassium pillared na4fev po4 3 c cathode for high performance sodium ion batteries |
| topic | Na4FeV(PO4)3 NASICON structure Sodium-ion batteries Cathode materials |
| url | http://www.sciencedirect.com/science/article/pii/S1388248125000220 |
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