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Hierarchical NiO@NiCo2O4 Core–shell Nanosheet Arrays on Ni Foam for High-Performance Electrochemical Supercapacitors
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-04-26 , DOI: 10.1021/acs.iecr.8b00467 Di Yao 1 , Yu Ouyang 1 , Xinyan Jiao 1 , Haitao Ye 1 , Wu Lei 1 , Xifeng Xia 1 , Lei Lu 1 , Qingli Hao 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-04-26 , DOI: 10.1021/acs.iecr.8b00467 Di Yao 1 , Yu Ouyang 1 , Xinyan Jiao 1 , Haitao Ye 1 , Wu Lei 1 , Xifeng Xia 1 , Lei Lu 1 , Qingli Hao 1
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A facile solvothermal method followed by a postannealing process is used to prepare NiO@NiCo2O4 core–shell nanosheet arrays supported on Ni foam substrate for a high-performance supercapacitor. The hybrid electrode possesses a three-dimensional structure with the “shell” of NiCo2O4 nanoflakes anchored on the “core” of ordered NiO nanosheets. It shows high specific capacitance of 1623.6 F g–1 (or specific capacity of 225.5 mAh g–1) at 2 A g–1 and excellent rate performance with a 96% capacitance retention rate at 20 A g–1. The high cycling stability is proved by nearly 90% capacitance retention at 10 A g–1 after 10000 cycles. Its asymmetric supercapacitor, assembled with NiO@NiCo2O4/Ni foam and the activated carbon/Ni foam as the positive and negative electrode, respectively, displays the specific energy of 52.5 W h kg–1 at 387.5 W kg–1. The excellent electrochemical performance of NiO@NiCo2O4 electrode indicates its great potential in applications of energy storage devices.
中文翻译：
Ni泡沫上的分层NiO @ NiCo 2 O 4核壳纳米片阵列，用于高性能电化学超级电容器
一种简便的溶剂热方法，然后进行后退火工艺，以制备负载在Ni泡沫基底上的NiO @ NiCo 2 O 4核壳纳米片阵列，以用作高性能超级电容器。混合电极具有三维结构，其中NiCo 2 O 4纳米薄片的“壳”锚定在有序NiO纳米片的“核”上。它在2 A g –1时显示出1623.6 F g –1的高比电容（或225.5 mAh g –1的比容量），并且在20 A g –1时具有96％的电容保持率，具有出色的倍率性能。通过在10 A g –1时保持近90％的电容，证明了高循环稳定性10000个周期后。其不对称超级电容器分别由NiO @ NiCo 2 O 4 / Ni泡沫和活性炭/ Ni泡沫作为正极和负极组装而成，在387.5 W kg –1时显示出52.5 W h kg –1的比能。NiO @ NiCo 2 O 4电极优异的电化学性能表明其在储能设备中的巨大潜力。
更新日期：2018-04-27
中文翻译：
Ni泡沫上的分层NiO @ NiCo 2 O 4核壳纳米片阵列，用于高性能电化学超级电容器
一种简便的溶剂热方法，然后进行后退火工艺，以制备负载在Ni泡沫基底上的NiO @ NiCo 2 O 4核壳纳米片阵列，以用作高性能超级电容器。混合电极具有三维结构，其中NiCo 2 O 4纳米薄片的“壳”锚定在有序NiO纳米片的“核”上。它在2 A g –1时显示出1623.6 F g –1的高比电容（或225.5 mAh g –1的比容量），并且在20 A g –1时具有96％的电容保持率，具有出色的倍率性能。通过在10 A g –1时保持近90％的电容，证明了高循环稳定性10000个周期后。其不对称超级电容器分别由NiO @ NiCo 2 O 4 / Ni泡沫和活性炭/ Ni泡沫作为正极和负极组装而成，在387.5 W kg –1时显示出52.5 W h kg –1的比能。NiO @ NiCo 2 O 4电极优异的电化学性能表明其在储能设备中的巨大潜力。
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