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

Qunxing Zhao, Mingming Zhao, Jiaqing Qiu,Huan Pang*,Wen-Yong Lai*andWei Huang*

School of Chemistry and Chemical Engineering, Yangzhou University

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 asassembled 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⁻³at 1.0 mA cm⁻²and exhibits the largest power density of 177.1 mW cm⁻³at 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.

Inorg. Chem. Front., 2017, 4, 442–449; IF=4.532, SCI

文章链接:http://pubs.rsc.org/en/content/articlelanding/2017/qi/c6qi00595k/unauth#!divAbstract文章附件：