Hierarchical porous ZnMn₂O₄ synthesized by the sucrose-assisted combustion method for high-rate supercapacitors

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• 作者：Tianfu Huang ; Chenhao Zhao ; Zehai Qiu ; Jiangshui Luo ; Zhibiao Hu
• 关键词：Supercapacitor ; ZnMn2O4 ; Sucrose ; assisted combustion ; Specific capacitance
• 刊名：Ionics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：23
• 期：1
• 页码：139-146
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage;
• 出版者：Springer Berlin Heidelberg
• ISSN：1862-0760
• 卷排序：23

文摘

A simple sucrose-assisted combustion and subsequent high-temperature calcination route have been employed to prepare hierarchical porous ZnMn₂O₄ nanostructure. When used as an electrode for supercapacitor, the ZnMn₂O₄ electrode displays a high specific capacitance of 411.75 F g−1 at a current density of 1 A g−1, remarkable capacitance retention rate of 64.28 % at current density of 32 A g−1 compared with 1 A g−1, as well as excellent cycle stability (reversible capacity retention of 88.32 % after 4000 cycles). The outstanding electrochemical performances are mainly attributed to its hierarchical porous architecture, which provides large reaction surface area, fast ion and electron transfer, and good structure stability. All these impressive results demonstrate that ZnMn₂O₄ shows promise for its application in supercapacitors.