CuCo2O4 flowers/Ni-foam architecture as a battery type positive electrode for high performance hybrid supercapacitor applications
CuCo2O4 flowers/Ni-foam architecture as a battery type positive electrode for high performance hybrid supercapacitor applications
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DOI：
10.1016/j.electacta.2017.03.178
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发表时间：
2017-06
影响因子：
6.6
通讯作者：
S. Vijayakumar;Sadayappan Nagamuthu;K. Ryu
中科院分区：
文献类型：
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作者：
S. Vijayakumar;Sadayappan Nagamuthu;K. Ryu
将电池型CuCo 2 O 4电极作为混合超级电容器应用的正极材料进行评价。通过简单的水热法和后煅烧处理在泡沫镍上制备了CuCo 2 O 4花状结构。采用X射线衍射（XRD）、场发射扫描电子显微镜（FESEM）和高分辨率透射电子显微镜对CuCo 2 O 4花/Ni泡沫的结构和形貌进行了表征。场发射扫描电镜清晰地显示了花的形态，这是由大量的花瓣。花瓣的长度和宽度分别为约5-8 μm和约50-150 nm。采用CuCo 2 O 4花/泡沫镍电极进行混合超级电容器应用的电化学表征。CuCo 2 O 4花状电极的比容量在5 mV s-1的扫描速率下为692.4C g-1（192.3 mA h g-1）。该花状CuCo 2 O 4电极在1 A g-1比电流下的最大比容量为645.1C g-1（179.2 mA h g-1），具有良好的长期循环稳定性。高比容量，良好的循环稳定性，低的内部和电荷转移电阻的CuCo 2 O 4花/镍泡沫电极证实了所制备的材料作为混合超级电容器应用的正极的适用性。
The battery type CuCo2O4electrode was evaluated as a positive electrode material for its hybrid supercapacitor applications. CuCo2O4flowers were prepared on Ni-foam through a simple hydrothermal process and post calcination treatment. The structure and morphology of the CuCo2O4flowers/Ni-foam was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and high resolution transmission electron microscopy. FESEM clearly revealed the flower-like morphology, which was composed of large number of petals. The length and width of the petals ranged from approximately 5–8 μm and approximately 50–150 nm, respectively. The CuCo2O4flowers/Ni-foam electrode was employed for electrochemical characterization for hybrid supercapacitor applications. The specific capacity of the CuCo2O4flower-like electrode was 692.4C g−1(192.3 mA h g−1) at a scan rate of 5 mV s−1. The flower-like CuCo2O4electrode exhibited a maximum specific capacity of 645.1C g−1(179.2 mA h g−1) at a specific current of 1 A g−1and good long term cyclic stability. The high specific capacity, good cyclic stability, and low internal and charge transfer resistance of the CuCo2O4flowers/Ni-foam electrode confirmed the suitability of the prepared material as a positive electrode for hybrid supercapacitor applications.