Crystallinity Tuning of Na3V2(PO4)3: Unlocking Sodium Storage Capacity and Inducing Pseudocapacitance Behavior
Abstract As a promising cathode material of sodium‐ion batteries, Na3V2(PO4)3 (NVP) has attracted extensive attention in recent years due to its high stability and fast Na+ ion diffusion. However, the reversible capacity based on the two‐electron reaction mechanism is not satisfactory limited by the...
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| Format: | Article |
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Wiley
2023-02-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202203552 |
| _version_ | 1797688125512744960 |
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| author | Hongyang Ma Bangchuan Zhao Jin Bai Peiyao Wang Wanyun Li Yunjie Mao Xiaoguang Zhu Zhigao Sheng Xuebin Zhu Yuping Sun |
| author_facet | Hongyang Ma Bangchuan Zhao Jin Bai Peiyao Wang Wanyun Li Yunjie Mao Xiaoguang Zhu Zhigao Sheng Xuebin Zhu Yuping Sun |
| author_sort | Hongyang Ma |
| collection | DOAJ |
| description | Abstract As a promising cathode material of sodium‐ion batteries, Na3V2(PO4)3 (NVP) has attracted extensive attention in recent years due to its high stability and fast Na+ ion diffusion. However, the reversible capacity based on the two‐electron reaction mechanism is not satisfactory limited by the inactive M1 lattice sites during the insertion/extraction process. Herein, self‐supporting 3D porous NVP materials with different crystallinity are fabricated on carbon foam substrates by a facile electrostatic spray deposition method. The V5+/V4+ redox couple is effectively activated and the three‐electron reactions are realized in NVP for sodium storage by a proper crystallinity tuning. In a disordered NVP sample, an ultra‐high specific capacity of 179.6 mAh g−1 at 0.2 C is achieved due to the coexistence of redox reactions of the V4+/V3+ and V5+/V4+ couples. Moreover, a pseudocapacitive charge storage mechanism induced by the disordered structure is first observed in the NVP electrode. An innovative model is given to understand the disorder‐induced‐pseudocapacitance phenomenon in this polyanion cathode material. |
| first_indexed | 2024-03-12T01:27:49Z |
| format | Article |
| id | doaj.art-df795677a1664855ab0b23925886abe4 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-03-12T01:27:49Z |
| publishDate | 2023-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-df795677a1664855ab0b23925886abe42023-09-12T14:40:47ZengWileyAdvanced Science2198-38442023-02-01104n/an/a10.1002/advs.202203552Crystallinity Tuning of Na3V2(PO4)3: Unlocking Sodium Storage Capacity and Inducing Pseudocapacitance BehaviorHongyang Ma0Bangchuan Zhao1Jin Bai2Peiyao Wang3Wanyun Li4Yunjie Mao5Xiaoguang Zhu6Zhigao Sheng7Xuebin Zhu8Yuping Sun9Key Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei 230031 P. R. ChinaKey Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei 230031 P. R. ChinaKey Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei 230031 P. R. ChinaKey Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei 230031 P. R. ChinaKey Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei 230031 P. R. ChinaKey Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei 230031 P. R. ChinaKey Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei 230031 P. R. ChinaHigh Magnetic Field Laboratory HFIPS Chinese Academy of Sciences Hefei 230031 P. R. ChinaKey Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei 230031 P. R. ChinaKey Laboratory of Materials Physics Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei 230031 P. R. ChinaAbstract As a promising cathode material of sodium‐ion batteries, Na3V2(PO4)3 (NVP) has attracted extensive attention in recent years due to its high stability and fast Na+ ion diffusion. However, the reversible capacity based on the two‐electron reaction mechanism is not satisfactory limited by the inactive M1 lattice sites during the insertion/extraction process. Herein, self‐supporting 3D porous NVP materials with different crystallinity are fabricated on carbon foam substrates by a facile electrostatic spray deposition method. The V5+/V4+ redox couple is effectively activated and the three‐electron reactions are realized in NVP for sodium storage by a proper crystallinity tuning. In a disordered NVP sample, an ultra‐high specific capacity of 179.6 mAh g−1 at 0.2 C is achieved due to the coexistence of redox reactions of the V4+/V3+ and V5+/V4+ couples. Moreover, a pseudocapacitive charge storage mechanism induced by the disordered structure is first observed in the NVP electrode. An innovative model is given to understand the disorder‐induced‐pseudocapacitance phenomenon in this polyanion cathode material.https://doi.org/10.1002/advs.202203552disorderM1 sitesNa3V2(PO4)3pseudocapacitancesodium‐ion batteries |
| spellingShingle | Hongyang Ma Bangchuan Zhao Jin Bai Peiyao Wang Wanyun Li Yunjie Mao Xiaoguang Zhu Zhigao Sheng Xuebin Zhu Yuping Sun Crystallinity Tuning of Na3V2(PO4)3: Unlocking Sodium Storage Capacity and Inducing Pseudocapacitance Behavior Advanced Science disorder M1 sites Na3V2(PO4)3 pseudocapacitance sodium‐ion batteries |
| title | Crystallinity Tuning of Na3V2(PO4)3: Unlocking Sodium Storage Capacity and Inducing Pseudocapacitance Behavior |
| title_full | Crystallinity Tuning of Na3V2(PO4)3: Unlocking Sodium Storage Capacity and Inducing Pseudocapacitance Behavior |
| title_fullStr | Crystallinity Tuning of Na3V2(PO4)3: Unlocking Sodium Storage Capacity and Inducing Pseudocapacitance Behavior |
| title_full_unstemmed | Crystallinity Tuning of Na3V2(PO4)3: Unlocking Sodium Storage Capacity and Inducing Pseudocapacitance Behavior |
| title_short | Crystallinity Tuning of Na3V2(PO4)3: Unlocking Sodium Storage Capacity and Inducing Pseudocapacitance Behavior |
| title_sort | crystallinity tuning of na3v2 po4 3 unlocking sodium storage capacity and inducing pseudocapacitance behavior |
| topic | disorder M1 sites Na3V2(PO4)3 pseudocapacitance sodium‐ion batteries |
| url | https://doi.org/10.1002/advs.202203552 |
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