Growth of NiCo2O4 nanotubes @MnO2 sheet core-shell arrays on 3D hierarchical porous carbon aerogels as superior electrodes for supercapacitors. (2019)

• Record Type: Journal Article
• Authors: Fan, H-L.; Zhang, J.; Ju, W.; Liu, B-X.; Zhao, X-F.; Liu, X-C.; Yi, X-B.
• Is Part Of: International journal of nanomanufacturing. Volume 15:Number 1/2(2019)
• Page Start: 92
• Page End: 104
• Publication Date: 2019
• Subjects: carbon aerogels -- NiCo2O4@MnO2 composites -- synergistic effect supercapacitors; Nanostructured materials industry -- Periodicals; Nanotechnology -- Periodicals; 620.505
• Languages: English
• ISSNs: 1746-9392

Abstract

The hierarchical of NiCo2 O4 @MnO2 core-shell nanotubes arrays anchored on 3D hierarchical porous carbon aerogels scaffold (NiCo2 O4 @MnO2 -CAS) are prepared through a facile hydrothermal method combined with a simple thermal treatment. Such unique array nanoarchitectures and the synergistic effects of component nanomaterials exhibit remarkable electrochemical performance. The results show high specific capacitance of 786.0 F/g at current densities of 0.5 A/g, excellent rate performance and good cycling stability with capacitance retention of 84.9% after 2, 000 cycles. An asymmetric supercapacitor with operating potential at 1.4 V is configured with NiCo2 O4 @MnO2 composites against active carbon, and exhibits a specific capacitance of 145.0 F/g at current density of 1.0 A/g and a high energy density of 39.0 Wh/kg at a power density of 350.0 W/kg.