Chemical synthesis and electrochemical analysis of nickel cobaltite nanostructures for supercapacitor applications
Chemical synthesis and electrochemical analysis of nickel cobaltite nanostructures for supercapacitor applications
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DOI：
10.1016/j.jallcom.2011.03.136
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发表时间：
2011-06
影响因子：
6.2
通讯作者：
R. R. Salunkhe-R.;K. Jang;Hyunuk Yu;Seongil Yu;T. Ganesh;Sung-Hwan Han;Heejoon Ahn
中科院分区：
文献类型：
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作者：
R. R. Salunkhe-R.;K. Jang;Hyunuk Yu;Seongil Yu;T. Ganesh;Sung-Hwan Han;Heejoon Ahn
通过化学浴沉积法和300 °C下焙烧3 h的工艺，在氧化铟锡（ITO）基底上合成了含有纳米棒和纳米片的镍钴酸盐（NiCo 2 O 4）薄膜。将NiCo 2 O 4/ITO薄膜用作超级电容器电极，通过循环伏安法和充放电实验研究了NiCo 2 O 4纳米结构的电化学性能. NiCo 2 O 4纳米棒表现出最大的比电容，在能量和功率密度分别为45 Wh kg− 1和2 kW kg−1时，其值为490 F g− 1。这明显优于NiCo 2 O 4纳米片的性能。循环寿命测试表明，NiCo 2 O 4的比电容即使在1000次循环后仍保持稳定，表明其在超级电容器应用中具有很高的潜力。NiCo 2 O 4纳米棒的低成本和环境友好性，加上其高超级电容器性能，提供了比其他过渡金属氧化物用于超级电容器的优势。
Nickel cobaltite (NiCo2O4) films containing nanorods and nanoflakes are synthesized on indium tin oxide (ITO) substrates by a chemical bath deposition method and calcination process at 300 °C for 3 h. The NiCo2O4/ITO films are used as electrodes for supercapacitor applications, and electrochemical properties of the NiCo2O4nanostructures are examined by cyclic voltammetry and charge–discharge experiments. NiCo2O4nanorods exhibit the largest specific capacitance, with a value of 490 F g−1at energy and power densities of 45 Wh kg−1and 2 kW kg−1, respectively. This is significantly better than the performance of NiCo2O4nanoflakes. Cycle-life tests show that the specific capacitance of NiCo2O4is stable even after 1000 cycles, indicating its high potential for supercapacitor applications. The low cost and environmental friendliness of NiCo2O4nanorods, coupled with its high supercapacitor performance, offer advantages over other transition metal oxides used for supercapacitors.