超级电容器
材料科学
电容
石墨烯
碳纳米纤维
电极
碳纳米管
气凝胶
碳纤维
化学工程
纳米技术
三元运算
复合材料
复合数
化学
工程类
物理化学
程序设计语言
计算机科学
作者
Tolendra Kshetri,Joong Hee Lee,Dinh Chuong Nguyen,Nam Hoon Kim,Kin-tak Lau
标识
DOI:10.1016/j.cej.2019.122543
摘要
Carbon materials with hierarchical nanostructures are well accepted propitious materials for electrode application in supercapacitor devices. Herein, a hierarchical ternary carbon aerogel structure is designed by integrating graphene (Gr), carbon nanofibers (CNFs), and carbon nanotubes (CNTs). The as-synthesized [email protected] materials are characterized by different analytical techniques for the electrode application in a supercapacitor. In the three-electrode system, [email protected] electrode material exhibits an enhanced electrochemical performance in which a high specific capacitance of 521.5 F g−1 was obtained at 0.25 A g−1 along with the excellent capacitance retention of 98% after consecutive 10,000 charge-discharge cycles at 5 A g−1 in 6 M KOH. In addition, a hybrid supercapacitor device based on [email protected] as the negative electrode and NiCo2S4 nanoneedle grown on nickel foam as the positive electrode was fabricated. The hybrid device shows 218 F g−1 of specific capacitance at 1 A g−1 and an energy density of 62.13 Wh Kg−1 at a power density of 789.66 W kg−1. Moreover, the device exhibits an excellent cyclic stability with the retention of 91.7% of its specific capacitance after 10,000 charge-discharge cycles. The obtained results signify that the [email protected] material possesses highly desirable properties for negative electrode application in advanced hybrid supercapacitor.
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