Hierarchical Mesoporous Zinc鈥揘ickel鈥揅obalt Ternary Oxide Nanowire Arrays on Nickel Foam as High-Performance Electrodes for Supercapacitors

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• 作者：Chun Wu ; Junjie Cai ; Qiaobao Zhang ; Xiang Zhou ; Ying Zhu ; Pei Kang Shen ; Kaili Zhang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：December 9, 2015
• 年：2015
• 卷：7
• 期：48
• 页码：26512-26521
• 全文大小：678K
• ISSN：1944-8252

文摘

Nickel foam supported hierarchical mesoporous Zn鈥揘i鈥揅o ternary oxide (ZNCO) nanowire arrays are synthesized by a simple two-step approach including a hydrothermal method and subsequent calcination process and directly utilized for supercapacitive investigation for the first time. The nickel foam supported hierarchical mesoporous ZNCO nanowire arrays possess an ultrahigh specific capacitance value of 2481.8 F g^鈥? at 1 A g^鈥? and excellent rate capability of about 91.9% capacitance retention at 5 A g^鈥?. More importantly, an asymmetric supercapacitor with a high energy density (35.6 Wh kg^鈥?) and remarkable cycle stability performance (94% capacitance retention over 3000 cycles) is assembled successfully by employing the ZNCO electrode as positive electrode and activated carbon as negative electrode. The remarkable electrochemical behaviors demonstrate that the nickel foam supported hierarchical mesoporous ZNCO nanowire array electrodes are highly desirable for application as advanced supercapacitor electrodes.