NiCo2O4 nanosheet supported hierarchical core-shell arrays for high-performance supercapacitors

Weiwei Zhou; Dezhi Kong; Xingtao Jia; Chunyan Ding; Chuanwei Cheng; Guangwu Wen

doi:10.1039/c3ta15430k

NiCo₂O₄ nanosheet supported hierarchical core-shell arrays for high-performance supercapacitors

Weiwei Zhou^*
, Dezhi Kong
, Xingtao Jia
, Chunyan Ding
, Chuanwei Cheng
, Guangwu Wen

^*Corresponding author for this work

School of Materials Science and Engineering, Harbin Institute of Technology Weihai
Tongji University

Research output: Contribution to journal › Article › peer-review

198 Scopus citations

Abstract

Two types of homogeneous NiCo₂O₄ nanosheet@NiCo ₂O₄ nanorod and heterogeneous NiCo₂O ₄ nanosheet@NiO nanoflake hierarchical core-shell arrays are synthesized via facile solution methods in combination with a simple thermal treatment. In both cases, the NiCo₂O₄ nanosheets serve as the core backbone for anchoring the shell materials. The two as-prepared hierarchical nanoarrays are evaluated as supercapacitor electrodes and demonstrate excellent electrochemical performance with high specific capacitance (1925 and 2210 F g^-1 for NiCo₂O₄@NiCo ₂O₄ and NiCo₂O₄@NiO at 0.5 A g ^-1, respectively), good rate capability, and superior cycling stability. The superior capacitive performance is mainly due to the unique hierarchical core-shell architecture with faster ion/electron transfer, improved reactivity, and enhanced structural stability. Our work can allow for the fabrication of various NiCo₂O₄ nanosheet supported hierarchical nanostructures for applications in energy storage, catalysis, and sensing. This journal is

Original language	English
Pages (from-to)	6310-6315
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	2
Issue number	18
DOIs	https://doi.org/10.1039/c3ta15430k
State	Published - 14 May 2014
Externally published	Yes

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title = "NiCo2O4 nanosheet supported hierarchical core-shell arrays for high-performance supercapacitors",

abstract = "Two types of homogeneous NiCo2O4 nanosheet@NiCo 2O4 nanorod and heterogeneous NiCo2O 4 nanosheet@NiO nanoflake hierarchical core-shell arrays are synthesized via facile solution methods in combination with a simple thermal treatment. In both cases, the NiCo2O4 nanosheets serve as the core backbone for anchoring the shell materials. The two as-prepared hierarchical nanoarrays are evaluated as supercapacitor electrodes and demonstrate excellent electrochemical performance with high specific capacitance (1925 and 2210 F g-1 for NiCo2O4@NiCo 2O4 and NiCo2O4@NiO at 0.5 A g -1, respectively), good rate capability, and superior cycling stability. The superior capacitive performance is mainly due to the unique hierarchical core-shell architecture with faster ion/electron transfer, improved reactivity, and enhanced structural stability. Our work can allow for the fabrication of various NiCo2O4 nanosheet supported hierarchical nanostructures for applications in energy storage, catalysis, and sensing. This journal is",

author = "Weiwei Zhou and Dezhi Kong and Xingtao Jia and Chunyan Ding and Chuanwei Cheng and Guangwu Wen",

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AU - Zhou, Weiwei

AU - Kong, Dezhi

AU - Jia, Xingtao

AU - Ding, Chunyan

AU - Cheng, Chuanwei

AU - Wen, Guangwu

PY - 2014/5/14

Y1 - 2014/5/14

N2 - Two types of homogeneous NiCo2O4 nanosheet@NiCo 2O4 nanorod and heterogeneous NiCo2O 4 nanosheet@NiO nanoflake hierarchical core-shell arrays are synthesized via facile solution methods in combination with a simple thermal treatment. In both cases, the NiCo2O4 nanosheets serve as the core backbone for anchoring the shell materials. The two as-prepared hierarchical nanoarrays are evaluated as supercapacitor electrodes and demonstrate excellent electrochemical performance with high specific capacitance (1925 and 2210 F g-1 for NiCo2O4@NiCo 2O4 and NiCo2O4@NiO at 0.5 A g -1, respectively), good rate capability, and superior cycling stability. The superior capacitive performance is mainly due to the unique hierarchical core-shell architecture with faster ion/electron transfer, improved reactivity, and enhanced structural stability. Our work can allow for the fabrication of various NiCo2O4 nanosheet supported hierarchical nanostructures for applications in energy storage, catalysis, and sensing. This journal is

AB - Two types of homogeneous NiCo2O4 nanosheet@NiCo 2O4 nanorod and heterogeneous NiCo2O 4 nanosheet@NiO nanoflake hierarchical core-shell arrays are synthesized via facile solution methods in combination with a simple thermal treatment. In both cases, the NiCo2O4 nanosheets serve as the core backbone for anchoring the shell materials. The two as-prepared hierarchical nanoarrays are evaluated as supercapacitor electrodes and demonstrate excellent electrochemical performance with high specific capacitance (1925 and 2210 F g-1 for NiCo2O4@NiCo 2O4 and NiCo2O4@NiO at 0.5 A g -1, respectively), good rate capability, and superior cycling stability. The superior capacitive performance is mainly due to the unique hierarchical core-shell architecture with faster ion/electron transfer, improved reactivity, and enhanced structural stability. Our work can allow for the fabrication of various NiCo2O4 nanosheet supported hierarchical nanostructures for applications in energy storage, catalysis, and sensing. This journal is

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NiCo₂O₄ nanosheet supported hierarchical core-shell arrays for high-performance supercapacitors

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