首页|Low-Temperature Carbonized Nitrogen-Doped Hard Carbon Nanofiber Toward High-Performance Sodium-Ion Capacitors

Low-Temperature Carbonized Nitrogen-Doped Hard Carbon Nanofiber Toward High-Performance Sodium-Ion Capacitors

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Carbon nanofiber(CNF)was widely utilized in the field of electrochemical energy storage due to its superiority of conductivity and mechanics.However,CNF was generally prepared at relatively high temperature.Herein,nitrogen-doped hard carbon nanofibers(NHCNFs)were prepared by a low-temperature carbonization treatment assisted with electrospinning technology.Density functional theory analysis elucidates the incorporation of nitrogen heteroatoms with various chemical states into carbon matrix would significantly alter the total electronic configurations,leading to the robust adsorption and efficient diffusion of Na atoms on electrode interface.The obtained material carbonized at 600 ℃(NHCNF-600)presented a reversible specific capacity of 191.0 mAh g-1 and no capacity decay after 200 cycles at 1 A g-1.It was found that the sodium-intercalated degree had a correlation with the electrochemical impedance.A sodium-intercalated potential of 0.2 V was adopted to lower the electrochemical impedance.The constructed sodium-ion capacitor with activated carbon cathode and presodiated NHCNF-600 anode can present an energy power density of 82.1 Wh kg-1 and a power density of 7.0 kW kg-1.

electrochemical presodiationlow-temperature carbonizationnitrogen-doped hard carbon nanofiberssodium-ion capacitors

Congkai Sun、Xiong Zhang、Yabin An、Chen Li、Lei Wang、Xiaohu Zhang、Xianzhong Sun、Kai Wang、Haitao Zhang、Yanwei Ma

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Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China

School of Engineering Sciences,University of Chinese Academy of Sciences,Beijing 100049,China

State Key Laboratory of Separation Membranes and Membrane Processes,Tianjin Key Laboratory of Advanced Fibers and Energy Storage,School of Material Science and Engineering,Tiangong University,Tianjin 300387,China

Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology,Qilu Zhongke,Jinan 250013,China

Key Laboratory of Advanced Technologies of Materials,Ministry of Education,School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China

School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaKey Research Program of Frontier Sciences,CASYouth Innovation Promotion Association,CAS

519071935182270651777200ZDBS-LY-JSC0472020145

2023

10.1002/eem2.12603

能源与环境材料(英文)

能源与环境材料(英文)

CSCD
ISSN：
年,卷(期)：2023.6(4)
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