1. Binary heteroatom doping enhanced the sodium storage performance of porous carbon nanofibers with fast kinetics.
- Author
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Zhu, Qingda, Chen, Jiyun, Yuan, Zhengqiu, Tao, Shi, Qian, Bin, and Kong, Fanjun
- Subjects
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SODIUM ions , *DENSITY functional theory , *SODIUM , *CARBON foams , *CARBON nanofibers , *ELECTRODE performance , *DEIONIZATION of water , *ADSORPTION capacity , *CHARGE transfer - Abstract
The low capacity, poor rate capability and sluggish kinetics limit the practical application of carbonaceous materials. Heteroatom doping is an effective method to regulate the intrinsic property and improve electrochemical reactivity of carbon-based materials. Herein, we prepare N/O co-doped porous carbon nanofibers (N/O–PCNF) with large surface area and high heteroatom doping for sodium ion batteries. The excellent electrochemical performance of optimized N/O–PCNF sample is due to high diffusion coefficient and low charge transfer resistance during the sodiation/desodiation process. Kinetic analysis reveals that the capacitive behaviors play an important role in sodium storage performance of N/O–PCNF sample. Moreover, density functional theory calculations further demonstrate that N/O co-doping can promote the adsorption capacity of sodium ions, and provide theoretical guidance for the excellent sodium storage performance of the electrode. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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