High-performance supercapacitors based on superior Co3O4 nanorods electrode for integrated energy harvesting-storage system. (20th August 2018)

• Record Type: Journal Article
• Authors: Pan, Xuexue; Ji, Fengzhen; Xia, Qiuyu; Chen, Xinman; Pan, Hui; Khisro, Said Nasir; Luo, Shixiong; Chen, Ming; Zhang, Yong
• Is Part Of: Electrochimica acta. Volume 282(2018)
• Page Start: 905
• Page End: 912
• Publication Date: 2018-08-20
• Subjects: Supercapacitors -- Co3O4 nanorods -- Harvesting-storage system -- Cycling stability; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.06.127
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: The Co3 O4 nanorods (NR-Co3 O4 ) electrode is synthesized by using a calcination-process assisted hydrothermal method. Each Co3 O4 nanorod possesses porous structure with well-defined nanoparticles. The unique NR-Co3 O4 electrode exhibits the superior electrochemical performances, including a specific capacity of 1272 C g −1 at a current density of 1.89 A g −1 and 90.3% of capacity retention after 18, 000 cycles at 23.58 A g −1 . The NR-Co3 O4 //active carbon (AC) device is also assembled to probe the virtues of NR-Co3 O4 electrode, manifesting a maximum energy density and power density of 55.4 Wh kg −1 and 4490 W kg −1, respectively. Amazingly, the NR-Co3 O4 //AC device exhibits the super-long cycling stability with 90.4% retention ratio after 36, 000 cycles. Furthermore, an energy harvesting-storage system is constructed by integrating the commercial solar panel with the power package composing of four NR-Co3 O4 //AC devices in-series, witnessing the fast photo-charge and discharge capability of NR-Co3 O4 //AC device. These facts strongly demonstrate the synthesized NR-Co3 O4 is promising towards the practical application for self-powered technology in future.