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Hierarchical Cu(OH)2@Ni2(OH)2CO3 core/shell nanowire arrays in situ grown on three-dimensional copper foam for high-performance solid-state supercapacitors
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-04-24 00:00:00 , DOI: 10.1039/c7ta01805c Sheng Zhu 1, 2, 3, 4, 5 , Zidan Wang 1, 2, 3, 4, 5 , Fangzhi Huang 1, 2, 3, 4, 5 , Hui Zhang 1, 2, 3, 4, 5 , Shikuo Li 1, 2, 3, 4, 5
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-04-24 00:00:00 , DOI: 10.1039/c7ta01805c Sheng Zhu 1, 2, 3, 4, 5 , Zidan Wang 1, 2, 3, 4, 5 , Fangzhi Huang 1, 2, 3, 4, 5 , Hui Zhang 1, 2, 3, 4, 5 , Shikuo Li 1, 2, 3, 4, 5
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Well-aligned hierarchical Cu(OH)2@Ni2(OH)2CO3 core/shell nanowire arrays were prepared on conductive copper foam via a simple in situ oxidation reaction and subsequent hydrothermal method for high-performance solid-state supercapacitors. Such novel hierarchical architectures integrate the merits of macroporous copper foam and the core/shell nanowire arrays such as superior electrical conductivity, enlarged surface area, and fast charge transport and ion diffusion. The areal capacitance of this typical hierarchical Cu(OH)2@Ni2(OH)2CO3 core/shell nanowire array reaches 1.09 F cm−2 at a current density of 1.0 mA cm−2, much higher than that of pristine Cu(OH)2 nanowire arrays (0.36 F cm−2). In addition, a remarkable rate capability (0.91 F cm−2 at a current density of 25 mA cm−2) and excellent cycling stability (86.1% after 10
000 cycles) were observed. Moreover, the hierarchical Cu(OH)2@Ni2(OH)2CO3 core/shell nanowire arrays were also used as the positive electrodes to fabricate solid-state asymmetric supercapacitor devices, exhibiting a high cell voltage of 1.6 V and largely enhanced energy density up to 1.01 W h cm−2. The improvement in electrochemical behaviors is attributed to the unique hierarchical architecture and the component synergistic effect. This work provides a scalable and promising strategy for the synthesis of well-defined core/shell nanoarrays as energy storage and conversion devices.
中文翻译：
用于高性能固态超级电容器的三维铜泡沫上原位生长的分层Cu（OH）2 @Ni 2（OH）2 CO 3核/壳纳米线阵列
通过简单的原位氧化反应和随后的水热方法，在高性能的固态超级电容器上，在导电铜泡沫上制备了排列良好的分层Cu（OH）2 @Ni 2（OH）2 CO 3核/壳纳米线阵列。这种新颖的分层体系结构整合了大孔泡沫铜和核/壳纳米线阵列的优点，例如优越的导电性，更大的表面积以及快速的电荷传输和离子扩散。这种典型的分层Cu（OH）2 @Ni 2（OH）2 CO 3核/壳纳米线阵列的面电容达到1.09 F cm-2在1.0毫安cm 2的电流密度-2，比原始的Cu（OH）的高得多2门纳米线阵列（0.36厘米˚F -2）。此外，一个显着的速率能力（0.91˚F厘米-2以25mA cm 2的电流密度-2）和优异的循环稳定性（10后86.1％000次循环），观察到。此外，分层Cu（OH） 2 @Ni 2（OH） 2 CO 3核/壳纳米线阵列也被用作正电极以制造固态不对称超级电容器器件，表现出1.6 V的高电池电压并大大增强了电压。能量密度高达1.01 W h cm -2。电化学行为的改善归因于独特的层次结构和组件协同效应。这项工作为合成定义明确的核/壳纳米阵列作为储能和转换设备提供了可扩展且有希望的策略。
更新日期：2017-05-10
000 cycles) were observed. Moreover, the hierarchical Cu(OH)2@Ni2(OH)2CO3 core/shell nanowire arrays were also used as the positive electrodes to fabricate solid-state asymmetric supercapacitor devices, exhibiting a high cell voltage of 1.6 V and largely enhanced energy density up to 1.01 W h cm−2. The improvement in electrochemical behaviors is attributed to the unique hierarchical architecture and the component synergistic effect. This work provides a scalable and promising strategy for the synthesis of well-defined core/shell nanoarrays as energy storage and conversion devices.
中文翻译：
用于高性能固态超级电容器的三维铜泡沫上原位生长的分层Cu（OH）2 @Ni 2（OH）2 CO 3核/壳纳米线阵列
通过简单的原位氧化反应和随后的水热方法，在高性能的固态超级电容器上，在导电铜泡沫上制备了排列良好的分层Cu（OH）2 @Ni 2（OH）2 CO 3核/壳纳米线阵列。这种新颖的分层体系结构整合了大孔泡沫铜和核/壳纳米线阵列的优点，例如优越的导电性，更大的表面积以及快速的电荷传输和离子扩散。这种典型的分层Cu（OH）2 @Ni 2（OH）2 CO 3核/壳纳米线阵列的面电容达到1.09 F cm-2在1.0毫安cm 2的电流密度-2，比原始的Cu（OH）的高得多2门纳米线阵列（0.36厘米˚F -2）。此外，一个显着的速率能力（0.91˚F厘米-2以25mA cm 2的电流密度-2）和优异的循环稳定性（10后86.1％
000次循环），观察到。此外，分层Cu（OH） 2 @Ni 2（OH） 2 CO 3核/壳纳米线阵列也被用作正电极以制造固态不对称超级电容器器件，表现出1.6 V的高电池电压并大大增强了电压。能量密度高达1.01 W h cm -2。电化学行为的改善归因于独特的层次结构和组件协同效应。这项工作为合成定义明确的核/壳纳米阵列作为储能和转换设备提供了可扩展且有希望的策略。
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