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Issue 103, 2014
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Dandelion-like cobalt hydroxide nanostructures: morphological evolution, soft template effect and supercapacitive application

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Abstract

A facile one-pot water bath method has been proposed to synthesize cobalt hydroxide (Co(OH)2) nanodandelions with polyvinyl pyrrolidone (PVP) as soft template. Morphological evolution has been investigated to reveal the crystal growth process of Co(OH)2 and understand the relationship between microstructure and capacitive properties by changing the reaction time and amounts of soft template. The results demonstrate that by rational design of the morphology, the electrochemical performance of Co(OH)2 can be dramatically enhanced. The unique dandelion-like structure can facilitate both ion and electron diffusion and improve the reaction kinetics, thus offering suitable characteristics for electrode materials of high performance supercapacitors. A high specific capacitance of 407 F g−1 is obtained, and after 5000 charge–discharge cycles at 10 A g−1, the capacitance retention is still as high as 92%. This work provides an effective method to synthesize hierarchical nanomaterials with high electrochemical capability.

Graphical abstract: Dandelion-like cobalt hydroxide nanostructures: morphological evolution, soft template effect and supercapacitive application

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Publication details

The article was received on 13 Sep 2014, accepted on 03 Nov 2014 and first published on 04 Nov 2014


Article type: Paper
DOI: 10.1039/C4RA10393A
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RSC Adv., 2014,4, 59603-59613

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    Dandelion-like cobalt hydroxide nanostructures: morphological evolution, soft template effect and supercapacitive application

    C. Li, X. Zhang, K. Wang, H. Zhang, X. Sun and Y. Ma, RSC Adv., 2014, 4, 59603
    DOI: 10.1039/C4RA10393A

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