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Science China Materials

, Volume 61, Issue 9, pp 1167–1176 | Cite as

Hierarchical mesoporous Co3O4@ZnCo2O4 hybrid nanowire arrays supported on Ni foam for high-performance asymmetric supercapacitors

  • Menggang Li (李蒙刚)
  • Weiwei Yang (杨微微)
  • Yarong Huang (黄雅荣)
  • Yongsheng Yu (于永生)
Articles

Abstract

In this paper, hierarchical mesoporous Co3O4@ZnCo2O4 hybrid nanowire arrays (NWAs) on Ni foam were prepared through a two-step hydrothermal process associated with successive annealing treatment. The Co3O4@ZnCo2O4 hybrid NWAs exhibited excellent electrochemical performances with a high specific capacity of 1240.5 C g−1 at a current density of 2 mA cm−2, with rate capability of 59.0% shifting from 2 to 30 mA cm−2, and only a 9.1% loss of its capacity even after 3,000 cycles at a consistent current density of 10 mA cm−2. An asymmetric supercapacitor (Co3O4@ZnCo2O4 NWAs||activated carbon) was fabricated and exhibited a high specific capacity of 168 C g−1 at a current density of 1 A g−1. And a preferable energy density of 37.3Wh kg−1 at a power density of 800 W kg−1 was obtained. The excellent electrochemical performances indicate the promising potential application of the hierarchical mesoporous Co3O4@ZnCo2O4 hybrid NWAs in energy storage field.

Keywords

Co3O4@ZnCo2O4 nanowire arrays specific capacity asymmetric supercapacitor 

用于高性能非对称超级电容器电极的泡沫镍负载分层介孔Co3O4@ZnCo2O4混合纳米线阵列

摘要

本文采用两步水热法和连续的退火处理过程, 制备了分层介孔Co3O4@ZnCo2O4复合纳米线阵列. 所制备的Co3O4@ZnCo2O4复合纳米线阵列具有优异的电化学性能, 在2 mA cm−2的电流密度下具有高达1240.5 C g−1的比容量. 当电流密度升高至30 mA cm−2时, 比容量保持率为59.0%, 甚至在10 mA cm−2的电流密度下循环3000圈, 比容量仅下降9.1%. 将其与活性炭组装成非对称超级电容器, 可以在1 A g−1的电流密度下表现出168 C g−1的比容量. 当功率密度为800 W kg−1时, 能量密度为37.3 W h kg−1. Co3O4@ZnCo2O4复合纳米阵列在储能领域具有广阔的应用前景.

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (51571072), the Fundamental Research Funds for the Central Universities (AUGA5710012715), China Postdoctoral Science Foundation (2015M81436) and Heilongjiang Postdoctoral Science Foundation (LBH-Z15065).

Supplementary material

40843_2017_9231_MOESM0_ESM.pdf (1.7 mb)
Hierarchical mesoporous Co3O4@ZnCo2O4 hybrid nanowire arrays supported on Ni foam for high-performance asymmetric supercapacitors

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Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Menggang Li (李蒙刚)
    • 1
  • Weiwei Yang (杨微微)
    • 1
  • Yarong Huang (黄雅荣)
    • 1
  • Yongsheng Yu (于永生)
    • 1
  1. 1.MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbinChina

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