Incorporation of Zinc Oxide into Carbon nanotube/Graphite nanofiber as high performance supercapacitor electrode. (20th February 2017)

• Record Type: Journal Article
• Authors: Ramli, Nurul Infaza Talalah; Rashid, Suraya Abdul; Mamat, Md Shuhazlly; Sulaiman, Yusran; Zobir, Syazwan Afif; Krishnan, Shutesh
• Is Part Of: Electrochimica acta. Volume 228(2017)
• Page Start: 259
• Page End: 267
• Publication Date: 2017-02-20
• Subjects: CNT -- GNF -- supercapacitors -- physicochemical -- electrochemical characterization; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.01.068
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: The specific capacitance is raised to 306 Fg −1 with 40 wt% of ZnO addition. The CNT/GNF/ZnO demonstrate excellent capacity retention of 99.4%. Improved supercapacitance performance is attributed to synergistic effects. The thermal stability is improved with 40 wt% of ZnO impregnation. Abstract: An efficient and simple hydrothermal method has been developed to prepare Carbon nanotube/Graphite nanofiber/Zinc Oxide (CNT/GNF/ZnO) ternary composites which are employed as supercapacitor materials. The electrochemical measurements reveal that the introduction of ZnO into CNT/GNF can enhance the specific capacitance value up to 306 Fg −1 at 10 mVs − 1, with 99.4% capacity retention. Field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) characterizations reveal that the combination of nanometer-sized CNT/GNF and random distribution of impregnated ZnO can form a highly conductive network. The improved supercapacitance property of CNT/GNF/ZnO can be ascribed to the synergistic effect between double layer capacitance of CNT/GNF and the pseudocapacitance of ZnO.