碳包覆氮化钒/碳(VN/C)复合纳米材料的制备以及作为超级电容器电极的应用

doi:10.11896/cldb.24100197

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Abstract Carbon-encapsulated vanadium nitride/carbon (VN/C) nanocomposites were synthesized via a carbonization-ammonolysis reduction method utilizing cetyltrimethylammonium bromide (CTAB) as both a template agent and carbon source. Experimental results indicate that a molar ratio of NH₄VO₃ to CTAB of 4∶1 yields the VN/C4∶1 composite with optimal structural properties. Within this composite, VN particles are uniformly encapsulated with a carbon layer approximately 1—10 nm thick. The material possesses a specific surface area of 244 m²/g and abundant mesopores ranging from 2—6 nm. This VN/C4∶1 composite exhibits combined electric double-layer capacitance (EDLC) and pseudocapacitive behavior, delivering a high specific capacitance of 406.7 F/g at a current density of 100 mA/g. Remarkably, it maintains a specific capacitance of 281.4 F/g even at a significantly elevated current density of 5 A/g, demonstrating excellent rate capability. To demonstrate its practical application, an asymmetric supercapacitor (ASC) was assembled using VN/C4∶1 as the anode and NiO_x as the cathode (denoted VN/C4∶1∥NiO_x). The device achieves a maximum specific capacitance of 118 F/g, delivering an energy density of 39.7 Wh/kg at a power density of 502 W/kg. Furthermore, at a high power density of 3 120 W/kg, the ASC retained an energy density of 21.5 Wh/kg. Notably, the asymmetric supercapacitor exhibits outstanding cycling stability, retaining 88.9% of its initial specific capacitance after 10 000 charge-discharge cycles.

Key words： carbon-encapsulated vanadium nitride/carbon (VN/C) nanocomposite supercapacitor electrode material

Published: 10 October 2025 Online: 2025-09-24

CLC number:	O646.54
	TM53

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	GAO Zhaohui
	TANG Maoyong
	CHI Jianwei
	ZHANG Tiange

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GAO Zhaohui,TANG Maoyong,CHI Jianwei, et al. Synthesis of Carbon-encapsulated Vanadium Nitride/Carbon (VN/C) Nanocomposites and Their Application as Supercapacitor Electrodes[J]. Materials Reports, 2025, 39(19): 24100197-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24100197 OR https://www.mater-rep.com/EN/Y2025/V39/I19/24100197

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