Two-dimensional(2D)graphitic carbon nitride(g-CN)is a promising anode material for sodium-ion batteries(SIBs),but its insufficient interlayer spacing and poor electronic conductivity impede its sodium storage capacity and cycling stability.Herein,we report the fabrication of a fullerene(C60)-modified graphitic carbon nitride(C60@CN)material which as an anode material for SIBs shows a high-reversible capacity(430.5 mA h g-1 at 0.05 A g-1,about 3 times higher than that of pristine g-CN),excellent rate capability(226.6 mA h g-1 at 1 A g-1)and ultra-long cycle life(101.2 mA h g-1 after 5000 cycles at 5 A g-1).Even at a high-active mass loading of 3.7 mg cm-2,a reversible capacity of 316.3 mA h g-1 can be obtained after 100 cycles.Such outstanding performance of C60@CN is attributed to the C60 molecules distributed in the g-CN nanosheets,which enhance the electronic conductivity and prevent g-CN sheets from restacking,thus resulting in enlarged interlayer spacing and exposed edge N defects(pyridinic N and pyrrolic N)for sodium-ion storage.Furthermore,a sodium-ion full cell combining C60@CN anode and NVPF@rGO cathode provides high-coulombic efficiency(＞96.5％),exceptionally high-energy density(359.8 W h kganode-at power density of 105.1 W kganode-1)and excellent cycling stability(89.2％capacity retention over 500 cycles at 1 A ganode-1).This work brings new insights into the field of carbon-based anode materials for SIBs.

Pengju Li;Yanglin Shen;Ximing Li;Wenhuan Huang;Xing Lu

Shaanxi Key Laboratory of Chemical Additives for Industry,College of Chemistry&Chemical Engineering,Shaanxi University of Science&Technology,Xi'an 710021,China;State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

能源与环境材料（英文）

[1]Pengju Li;Yanglin Shen;Ximing Li;Wenhuan Huang;Xing Lu-.Fullerene-Intercalated Graphitic Carbon Nitride as a High-Performance Anode Material for Sodium-Ion Batteries)[J].能源与环境材料（英文）,2022(02):608-616

Intercalated,kganode,ganode

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