General self-template synthesis of transition-metal oxide microspheres and their excellent charge storage properties. (1st September 2018)

• Record Type: Journal Article
• Authors: Wang, Chenyu; Zeng, Xiaojun; Jiang, Guangming; Chen, Meng; Zhu, Lingyu; Yu, Ronghai
• Is Part Of: Electrochimica acta. Volume 283(2018)
• Page Start: 190
• Page End: 196
• Publication Date: 2018-09-01
• Subjects: Transition metal oxide -- Self-template -- Ultrathin nanosheets -- Charge storage properties -- Universality; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.06.157
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Transition metal oxides are promising electrode materials for electrochemical energy storage and conversion to replace the precious metal-based electrode materials. Herein, we demonstrate a universal method for making flower-like transition metal oxides (NiO, Co3 O4, NiCo2 O4 ) microspheres as excellent electrode materials for electrochemical capacitors. These as-obtained flower-like microspheres organized from a large number of ultrathin nanosheets, which can provide high surface area and abundant mesoporous structures. Furthermore, the as-fabricated NiO, Co3 O4 and NiCo2 O4 microspheres exhibit high specific capacities of 1210.6, 802.5 and 842.5 F g −1 at a current density of 0.5 A g −1 . Those microspheres also show good cyclability with capacities retention of 94.7%, 87% and 88.6% after 3000 cycles. The general self-template method holds great potential for the fabrication of high-performance charge storage devices. Graphical abstract: Image 1