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Nitrogen doped 2D graphene/Zn3V2O8 nanocomposite with enhanced supercapacitive features
Surfaces and Interfaces ( IF 6.2 ) Pub Date : 2021-04-15 , DOI: 10.1016/j.surfin.2021.101129
B. Suganya , S. Maruthamuthu , J. Chandrasekaran , B. Saravanakumar , E. Vijayakumar , R. Marnadu , H. Elhosiny Ali , Tien Dai Nguyen

Herein, we report the design of N-doped graphene anchored Zn3V2O8 (MTMO) composite material prepared via hydrothermal method to facilitate more active channels for ion intercalation and to improve the specific capacitance for supercapacitor electrode applications. The sheet like morphology of the Zn3V2O8@graphene (GVZ) composite offered additional active sites for ion buffering at electrode –electrolyte interface. When employed as a supercapacitor electrode, the composite demonstrated attractive capacitive features like capacitance 395 Fg−1at a current density of 1 Ag−1, good rate capacitance (232 Fg−1 @10 Ag−1) and better cyclic stability after 5000 cycles. Besides, this asymmetric supercapacitor could deliver an energy density of 10 Whkg−1 at a power density of 312 Wkg−1. The device showed 77 % of capacitance retention even after 5000 cycles.



中文翻译:

氮掺杂的二维石墨烯/ Zn 3 V 2 O 8纳米复合材料,具有增强的超电容特性

本文中,我们报告了通过水热法制备的N掺杂石墨烯锚定的Zn 3 V 2 O 8(MTMO)复合材料的设计,以促进离子嵌入的更多活性通道并提高超级电容器电极应用的比电容。Zn 3 V 2 O 8石墨烯(GVZ)复合材料的片状形态为电极-电解质界面的离子缓冲提供了额外的活性位。当用作超级电容器电极时,该复合材料表现出有吸引力的电容特性,例如在1 Ag -1的电流密度下具有395 Fg -1的电容,良好的倍率电容(232 Fg -1@ 10 Ag -1)和5000次循环后具有更好的循环稳定性。此外,这种不对称超级电容器可以在312 Wkg -1的功率密度下提供10 Whkg -1的能量密度。即使经过5000次循环,该器件仍显示77%的电容保持率。

更新日期:2021-04-21
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