Hierarchical β-Co(OH)2/CoO nanosheets: an additive-free synthesis approach for supercapattery applications

• Published in: Ionics Vol. 25; no. 5; pp. 2437 - 2444
• Main Authors: Babu, I. Manohara, William, J. Johnson, Muralidharan, G.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2019; Springer Nature B.V
• Subjects: Additives; Chemistry; Chemistry and Materials Science; Cobalt; Condensed Matter Physics; Current density; Electrochemistry; Electrode materials; Energy Storage; Nanosheets; Optical and Electronic Materials; Organic chemistry; Renewable and Green Energy; Short Communication; Cobalt hydroxide; Supercapattery; Additive; Nanosheet
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-019-02944-3

Cobalt hydroxide nanosheets have been synthesized via facile and affordable simple chemistry route without any additives for structure design. Co(OH) 2 nanosheets exhibit a maximum specific capacity of 111 C g −1 at a current density of 0.5 A g −1 . Asymmetric supercapacitor (Co(OH) 2 //AC) has been fabricated and it delivers the specific capacitance of 34 F g −1 with the power density of 300 W kg −1 at a current density of 1 A g −1 . These profitable features of cobalt hydroxide nanosheets prepared in the present work are quite promising electrode material for high-performance supercapatteries.