Issue 3, 2017

Facile synthesis of Mn3[Co(CN)6]2·nH2O nanocrystals for high-performance electrochemical energy storage devices

Abstract

Recently, although great efforts have been committed to enhance the electrochemical performance of supercapacitors (SCs), these devices are still unable to meet our expectations on account of limited working voltage, insufficient cycle life, low mechanical flexibility, and high cost. In this work, we have successfully synthesized several Mn3[Co(CN)6]2·nH2O nanocrystals by a mild precipitation method at room temperature. These Mn3[Co(CN)6]2·nH2O nanocrystals, as a novel kind of positive electrode materials, are firstly applied in flexible solid-state electrochemical energy storage devices. The best one of the as-assembled devices based on the as-prepared Mn3[Co(CN)6]2·nH2O nanocrystals shows high electrochemical performance activity, which offers the highest volumetric energy density of 4.69 mW h cm−3 at 1.0 mA cm−2 and exhibits the largest power density of 177.1 mW cm−3 at 20.0 mA cm−2. Remarkably, the device displayed wonderful mechanical flexibility as the bending angle range from 0° to 180°. Moreover, the device demonstrated little capacitance change over 7000 cycles at 1.0 mA cm−2, and exhibited a great cycling stability with 96.1% capacitance retention.

Graphical abstract: Facile synthesis of Mn3[Co(CN)6]2·nH2O nanocrystals for high-performance electrochemical energy storage devices

Supplementary files

Article information

Article type
Research Article
Submitted
21 Dec 2016
Accepted
31 Dec 2016
First published
03 Jan 2017

Inorg. Chem. Front., 2017,4, 442-449

Facile synthesis of Mn3[Co(CN)6]2·nH2O nanocrystals for high-performance electrochemical energy storage devices

Q. Zhao, M. Zhao, J. Qiu, H. Pang, W. Lai and W. Huang, Inorg. Chem. Front., 2017, 4, 442 DOI: 10.1039/C6QI00595K

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