钠离子电池负极材料W-Nb2O5/C的制备及性能研究
刘亚婷 , 李黎兵 , 李欣欣 , 苗永霞 , 陈俊利 , 杨新丽
现代化工 ›› 2025, Vol. 45 ›› Issue (5) : 163 -170.
钠离子电池负极材料W-Nb2O5/C的制备及性能研究
Preparation and performance study of W-Nb2O5/C anode materials for sodium ion batteries
W-Nb2O5/C nano-composite materials are synthesized through the hydrothermal method.The morphology and structure of W-Nb2O5/C are characterized by means of X-ray powder diffraction (XRD),scanning electron microscopy (SEM),transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS).The electrochemical properties of the materials for sodium ion batteries are studied.Results indicate that the 5% W-Nb2O5/C composite material has the best electrochemical performance,which presents a discharge specific capacity of 191.0 mAh·g-1 and a capacity retention rate of 70.2% after 100 cycles at a current density of 100 mA·g-1 and a voltage range of 0.01-3.0 V.At a current density as high as 500 mAh·g-1,its discharge specific capacity is still 130.7 mAh·g-1 after 500 cycles.W6+ doping can improve the specific capacity of the electrode material,and carbon composite can enhance the electronic conductivity of Nb2O5 nano-sheet material,resulting in good cycling performance and excellent rate performance.
Nb2O5 / sodium ion battery / tungsten-doped carbon composite materials
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白晓宇, 郭文林, 任志强, |
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| [4] |
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| [5] |
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| [6] |
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| [7] |
|
| [8] |
|
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
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| [14] |
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| [15] |
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| [16] |
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| [17] |
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河南省高校科技创新团队支持计划项目(24IRTSTHN006)
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