Enhanced Electrochemical Performance of Dual-Ion Batteries with T-Nb<sub>2</sub>O<sub>5</sub>/Nitrogen-Doped Three-Dimensional Porous Carbon Composites
Niobium pentoxide (T-Nb<sub>2</sub>O<sub>5</sub>) is a promising anode material for dual-ion batteries due to its high lithium capacity and fast ion storage and release mechanism. However, T-Nb<sub>2</sub>O<sub>5</sub> suffers from the disadvantages of...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/2/227 |
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| Summary: | Niobium pentoxide (T-Nb<sub>2</sub>O<sub>5</sub>) is a promising anode material for dual-ion batteries due to its high lithium capacity and fast ion storage and release mechanism. However, T-Nb<sub>2</sub>O<sub>5</sub> suffers from the disadvantages of poor electrical conductivity and fast cycling capacity decay. Herein, a nitrogen-doped three-dimensional porous carbon (RMF) was prepared for loading niobium pentoxide to construct a composite system with excellent electrochemical performance. The obtained T-Nb<sub>2</sub>O<sub>5</sub>/RMF composites have a well-developed pore structure and a high specific surface area of 1568.5 m<sup>2</sup> g<sup>−1</sup>, which could effectively increase the contact area between the material and electrolyte, improving the electrode reaction and lithium-ion transfer diffusion. Nitrogen doping increased surface polarity, creating more active sites and accelerating the electrode reaction rate. The introduction of T-Nb<sub>2</sub>O<sub>5</sub> imparted high power density and excellent cycling stability to the battery. The composites exhibited good electrochemical performance when used as dual-ion battery anode, with a stable cycle life of 207.2 mA h g<sup>−1</sup> at 1 A g<sup>−1</sup> current density after 650 cycles and great rate performance of 181.5 mA h g<sup>−1</sup> at 5A g<sup>−1</sup> was also obtained. This work provides the possibility for applying T-Nb<sub>2</sub>O<sub>5</sub>/RMF as an anode for a high-performance dual-ion battery. |
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| ISSN: | 1420-3049 |