Hybrid nanonet/nanoflake NiCo2O4 electrodes with an ultrahigh surface area for supercapacitors
Hybrid nanonet/nanoflake NiCo2O4 electrodes with an ultrahigh surface area for supercapacitors
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DOI：
10.1007/s10008-014-2546-4
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发表时间：
2014-07
影响因子：
2.5
通讯作者：
Yang Lu;Hailong Yan;Deyang Zhang;Jing Lin;Yanming Xue;Jie Li;Yongsong Luo;Chengchun Tang
中科院分区：
文献类型：
--
作者：
Yang Lu;Hailong Yan;Deyang Zhang;Jing Lin;Yanming Xue;Jie Li;Yongsong Luo;Chengchun Tang
摘要在不锈钢网基底上生长的由混合纳米网/纳米片NiCo 2 O 4组成的集成电极具有高的比电容，同时保持高倍率性能和良好的循环稳定性。比电容在10 A g−1的电流密度下达到最大值911 F g−1，在10，000次循环后仍能保持864 F g−1（94.8%保持率）。这些电化学性能的显著提高归功于NiCo 2 O 4电极独特的结构。互连的纳米网NiCo 2 O 4具有良好的表面积，显著促进了快速的离子/电子传输，并保证了良好的机械粘附力，而纳米片进一步扩展了快速氧化还原反应的活性位点，以实现有效的能量存储。
图在不锈钢网上生长的混合纳米网/纳米片NiCo 2 O 4作为高性能超级电容器的集成电极，具有上级电容性能和长寿命稳定性。
AbstractAn integrated electrode consisting of hybrid nanonet/nanoflake NiCo2O4 grown on stainless steel mesh substrates exhibits a high specific capacitance while maintaining high-rate capability and good cycling stability. The specific capacitance reaches a maximum of 911 F g−1 at a current density of 10 A g−1, which can still retain 864 F g−1 (94.8 % retention) after 10,000 cycles. These much-improved electrochemical performances are attributed to the unique architecture of NiCo2O4 electrode. The interconnected nanonet NiCo2O4 with an ultrahigh surface area significantly facilitates the rapid ion/electron transport and guarantees good mechanical adhesion, while the ultrathin nanoflakes further extend the active sites for fast redox reactions for efficient energy storage.
FigureHybrid nanonet/nanoflake NiCo2O4 grown on stainless steel mesh exhibits superior capacitive performance and long-life stability as an integrated electrode for high-performance supercapacitors.