Three-dimensional nanoscale Co3O4 electrode on ordered Ni/Si microchannel plates for electrochemical supercapacitors

Mai Li; Shaohui Xu; Yiping Zhu; Yuwei Xu; Pingxiong Yang; Lianwei Wang; Paul K. Chu

doi:10.1016/j.matlet.2014.06.148

Three-dimensional nanoscale Co₃O₄ electrode on ordered Ni/Si microchannel plates for electrochemical supercapacitors

Mai Li, Shaohui Xu, Yiping Zhu, Yuwei Xu, Pingxiong Yang, Lianwei Wang^*, Paul K. Chu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

12 Citations (Scopus)

Abstract

Nanoscale cobalt oxide (Co₃O₄) particles are produced on three-dimensional nickel/silicon microchannel plates (Ni/Si-MCPs) as the active electrode materials in miniature supercapacitors. The Co ₃O₄ nano-flakes are fabricated on the surface and interior of the Ni/Si-MCPs by annealing the nano-structured Co(OH)₂/Ni/Si- MCPs, and the electrical conductivity and capacitance retention are improved. The Ni/Si-MCPs covered with nano-flaked Co₃O₄ supercapacitor offer smaller charging current leakage and higher discharging voltage than Ni/Si-MCPs electrodeposited with cobalt hydroxide {Co(OH)₂}. Specific capacitance as high as 2.424 F/cm² or 606.24 F/g is achieved from the materials and the retention ratio is 89.85% after 2000 cycles thus demonstrating excellent potential in miniature supercapacitors. © 2014 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	405-408
Journal	Materials Letters
Volume	132
Online published	30 Jun 2014
DOIs	https://doi.org/10.1016/j.matlet.2014.06.148
Publication status	Published - 1 Oct 2014

Research Keywords

Energy storage and conversion
Silicon microchannel plates (Si-MCPs)
Thin films
Cobalt oxide (Co3O4)

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@article{583437eb1fee4543a0da9df0c93669e9,

title = "Three-dimensional nanoscale Co3O4 electrode on ordered Ni/Si microchannel plates for electrochemical supercapacitors",

abstract = "Nanoscale cobalt oxide (Co3O4) particles are produced on three-dimensional nickel/silicon microchannel plates (Ni/Si-MCPs) as the active electrode materials in miniature supercapacitors. The Co 3O4 nano-flakes are fabricated on the surface and interior of the Ni/Si-MCPs by annealing the nano-structured Co(OH)2/Ni/Si- MCPs, and the electrical conductivity and capacitance retention are improved. The Ni/Si-MCPs covered with nano-flaked Co3O4 supercapacitor offer smaller charging current leakage and higher discharging voltage than Ni/Si-MCPs electrodeposited with cobalt hydroxide {Co(OH)2}. Specific capacitance as high as 2.424 F/cm2 or 606.24 F/g is achieved from the materials and the retention ratio is 89.85% after 2000 cycles thus demonstrating excellent potential in miniature supercapacitors. {\textcopyright} 2014 Elsevier B.V. All rights reserved.",

keywords = "Energy storage and conversion, Silicon microchannel plates (Si-MCPs), Thin films, Cobalt oxide (Co3O4)",

author = "Mai Li and Shaohui Xu and Yiping Zhu and Yuwei Xu and Pingxiong Yang and Lianwei Wang and Chu, {Paul K.}",

year = "2014",

month = oct,

day = "1",

doi = "10.1016/j.matlet.2014.06.148",

language = "English",

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journal = "Materials Letters",

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TY - JOUR

T1 - Three-dimensional nanoscale Co3O4 electrode on ordered Ni/Si microchannel plates for electrochemical supercapacitors

AU - Li, Mai

AU - Xu, Shaohui

AU - Zhu, Yiping

AU - Xu, Yuwei

AU - Yang, Pingxiong

AU - Wang, Lianwei

AU - Chu, Paul K.

PY - 2014/10/1

Y1 - 2014/10/1

N2 - Nanoscale cobalt oxide (Co3O4) particles are produced on three-dimensional nickel/silicon microchannel plates (Ni/Si-MCPs) as the active electrode materials in miniature supercapacitors. The Co 3O4 nano-flakes are fabricated on the surface and interior of the Ni/Si-MCPs by annealing the nano-structured Co(OH)2/Ni/Si- MCPs, and the electrical conductivity and capacitance retention are improved. The Ni/Si-MCPs covered with nano-flaked Co3O4 supercapacitor offer smaller charging current leakage and higher discharging voltage than Ni/Si-MCPs electrodeposited with cobalt hydroxide {Co(OH)2}. Specific capacitance as high as 2.424 F/cm2 or 606.24 F/g is achieved from the materials and the retention ratio is 89.85% after 2000 cycles thus demonstrating excellent potential in miniature supercapacitors. © 2014 Elsevier B.V. All rights reserved.

AB - Nanoscale cobalt oxide (Co3O4) particles are produced on three-dimensional nickel/silicon microchannel plates (Ni/Si-MCPs) as the active electrode materials in miniature supercapacitors. The Co 3O4 nano-flakes are fabricated on the surface and interior of the Ni/Si-MCPs by annealing the nano-structured Co(OH)2/Ni/Si- MCPs, and the electrical conductivity and capacitance retention are improved. The Ni/Si-MCPs covered with nano-flaked Co3O4 supercapacitor offer smaller charging current leakage and higher discharging voltage than Ni/Si-MCPs electrodeposited with cobalt hydroxide {Co(OH)2}. Specific capacitance as high as 2.424 F/cm2 or 606.24 F/g is achieved from the materials and the retention ratio is 89.85% after 2000 cycles thus demonstrating excellent potential in miniature supercapacitors. © 2014 Elsevier B.V. All rights reserved.

KW - Energy storage and conversion

KW - Silicon microchannel plates (Si-MCPs)

KW - Thin films

KW - Cobalt oxide (Co3O4)

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U2 - 10.1016/j.matlet.2014.06.148

DO - 10.1016/j.matlet.2014.06.148

M3 - RGC 21 - Publication in refereed journal

SN - 0167-577X

VL - 132

SP - 405

EP - 408

JO - Materials Letters

JF - Materials Letters

ER -