Issue 4, 2012
From the journal:

RSC Advances

Printable thin film supercapacitors utilizing single crystal cobalt hydroxidenanosheets

Xiaobo Ji,b   Philip M. Hallam,a   Said M. Houssein,a   Rashid Kadara,a   Leiming Langc  and  Craig E. Banks*a  

* Corresponding authors

a School of Chemistry and the Environment, Division of Chemistry and Environmental Science, Manchester Metropolitan University, John Dalton Building, Chester St., Manchester, M1 5GD, UK
E-mail: c.banks@mmu.ac.uk
Web: www.craigbanksresearch.com
Fax: +44(0)1612476831
Tel: +44(0)1612471196

b College of Chemistry and Chemical Engineering and State Key Laboratory for Powder Metallurgy, Central South University, Changsha, China

c Biochemical and Environmental Engineering College, Nanjing Xiaozhuang University, Nanjing

Abstract

Cobalt hydroxide (β-Co(OH)2) thin film supercapacitors are developed for the first time via screen printing and their potential application towards energy storage (as an electrode material within a supercapacitor) explored. The highly uniform, porous nanostructures were synthesized via a novel, hydrothermal, template-free approach. The nanostructures consist of amassing, arbitrarily layered, interconnecting nanosheets, resulting in a flower-like structure with many fissures. These nanostructures were fabricated into flexible thin film supercapacitors via screen printing for the first time. The β-Co(OH)2 asymmetric supercapacitor is found to deliver a maximum specific capacitance of ∼170 F g−1 at a current density of 0.5 μA in an aqueous electrolyte solution (3M KOH) retaining 99.69% of its maximum capacity over 600 cycles. Given the ability to mass produce such supercapacitors via screen printing, where readily, synthetically fabricated nanostructures can be incorporated, the application of this approach will likely be widely implemented.

Graphical abstract: Printable thin film supercapacitors utilizing single crystal cobalt hydroxide nanosheets

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Article information

DOI
https://doi.org/10.1039/C1RA01061A
Article type
Paper
Submitted
10 Nov 2011
Accepted
11 Nov 2011
First published
19 Dec 2011

RSC Adv., 2012,2, 1508-1515

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Printable thin film supercapacitors utilizing single crystal cobalt hydroxide nanosheets

X. Ji, P. M. Hallam, S. M. Houssein, R. Kadara, L. Lang and C. E. Banks, RSC Adv., 2012, 2, 1508 DOI: 10.1039/C1RA01061A

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