Electrochemical energy storage performance of heterostructured SnO₂@MnO₂ nanoflakes

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• 作者：Huanhao Xiao ; Shunyu Yao ; Fengyu Qu ; Xu Zhang ; ^{xzhang@hrbnu.edu.cn} ; Xiang Wu ; ^{wuxiang@hrbnu.edu.cn}
• 关键词：SnO2@MnO2 nanoflakes ; Hydrothermal ; Electrode materials ; Supercapacitor
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：43
• 期：2
• 页码：1688-1694
• 全文大小：1405 K
• 卷排序：43

文摘

In this work, we report synthesis of SnO2@MnO2 nanoflakes grown on nickel foam through a facile two-step hydrothermal route. The as-obtained products are characterized by series of techniques such as scanning electron microscopy (SEM), X-ray diffraction spectroscopy (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The as-obtained SnO2@MnO2 nanoflakes are directly used as supercapacitor electrode materials. The results show that the electrode possesses a high discharge areal capacitance of 1231.6 mF cm−2 at 1 mA cm−2 and benign cycling stability with 67.2% of initial areal capacitance retention when the current density is 10 mA cm−2 after 6000 cycles. Moreover, the heterostructured electrode shows 41.1% retention of the initial capacitance when the current densities change from 1 to 10 mA cm−2, which reveals good rate capability. SnO2@MnO2 nanoflakes products which possess excellent electrochemical properties might be used as potential electrode materials for supercapacitor applications.