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Full synergistic effect of hydrothermal NiCo2O4 nanosheets/CuCo2O4 nanocones supported on Ni foam for high-performance asymmetric supercapacitors
Journal of Solid State Chemistry ( IF 3.3 ) Pub Date : 2018-03-21 , DOI: 10.1016/j.jssc.2018.03.023
Shiyang Wen , Yu Liu , Hongye Bai , Rong Shao , Wei Xu , Weidong Shi

In this work, a series of NiCo2O4/CuCo2O4 composites were prepared by a two-step hydrothermal method. The optimized NiCo2O4/CuCo2O4 electrode shows more than 5 times area capacitance (4.97 F cm−2) than pure NiCo2O4 at the current density of 1 mA cm−2. The best performance of sample assembled an asymmetric supercapacitor could reach up to 42 F g−1 at the current density of 1 A g−1. In addition, the maximum energy density of 15 W h kg−1 was achieved with the power density of 814 W kg−1. The as-prepared active electrode material also reveals excellent cycling stability with 90.6% capacitance retention after 5000 cycles. These results indicate potential application in developing energy storage devices with high energy density power density.



中文翻译:

热液的全协同效应镍钴2 ö 4个纳米片/ CUCO 2个ö 4支撑在镍泡沫的高性能超级电容器不对称纳米锥

通过两步水热法制备了一系列NiCo 2 O 4 / CuCo 2 O 4复合材料。优化的镍钴2 ö 4 / CUCO 2 ö 4电极示出了5倍以上面积的电容(4.97厘米˚F -2)比纯镍钴2 ö 4在1毫安厘米的电流密度-2 。样品的最佳性能组装的不对称超级电容器可达到高达42 F G -1 1 A G的电流密度-1。此外,最大能量密度为15 W h kg -1功率密度为814 W kg -1时达到的。所制备的活性电极材料还显示出优异的循环稳定性,在5000次循环后具有90.6%的电容保持率。这些结果表明在开发具有高能量密度功率密度的能量存储设备中的潜在应用。

更新日期:2018-04-07
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