Heterostructured Ni(OH)2-Co(OH)2 composites on 3D ordered Ni-Co nanoparticles fabricated on microchannel plates for advanced miniature supercapacitor

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

doi:10.1016/j.jallcom.2013.11.230

Heterostructured Ni(OH)₂-Co(OH)₂ composites on 3D ordered Ni-Co nanoparticles fabricated on microchannel plates for advanced miniature supercapacitor

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

School of Physics and Electronic Science

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

43 Scopus citations

Abstract

Silicon microchannel plates (Si-MCPs) coated with a layer of nickel cobalt alloy (NCA) constitute an excellent substrate for miniature supercapacitors. Nanoscale Ni(OH)₂-Co(OH)₂ composite particles serving as the active materials are electrodeposited on ordered three-dimensional (3D) NCA/Ni/Si-MCPs and the Ni(OH)₂-Co(OH)₂ composites have different structures depending on the amount of Co(OH)₂ in Ni(OH)₂. The nickel hydroxide synthesized from a water-acetone 0.1 M Ni(NO₃)₂×6H₂O solvent has a compact structure, but that from a 0.1 M Ni(NO₃)₂×6H ₂O solvent containing 5% Co(NO₃)₂×6H ₂O is loosely packed with nanoparticles and that from a 0.1 M Ni(NO₃)₂×6H₂O solvent containing 10% Co(NO₃)₂×6H₂O contains many nanoparticles. Addition of Co(NO₃)₂×6H₂O results in a smooth morphology. The smooth structure is also observed from active materials produced in 20% and 30% Co(NO₃)₂× 6H₂O solvents. Five types of electrode materials are investigated from the perspective of electrochemical capacitors by conducting cyclic voltammogram, galvanostatic charge-discharge measurements, and electrochemical impedance spectroscopy. In this experiment, the highest specific capacitance of 7.8 F cm^-2 is achieved in the samples prepared in 10% Co(NO ₃)₂×6H₂O at a discharge current density of 20 mA cm^-2. It is much better than 1.46 F cm^-2 observed from previous attempts and the materials have excellent capacity retention.

Original language	English
Pages (from-to)	364-371
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	589
DOIs	https://doi.org/10.1016/j.jallcom.2013.11.230
State	Published - 15 Mar 2014

Keywords

Electrochemical capacitors
Electrodeposition
Nanoparticles
Ni-Co alloys
Ordered three-dimensional microchannel plates

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10.1016/j.jallcom.2013.11.230

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@article{3933963f0a2f43d2a57688390ac929d3,

title = "Heterostructured Ni(OH)2-Co(OH)2 composites on 3D ordered Ni-Co nanoparticles fabricated on microchannel plates for advanced miniature supercapacitor",

abstract = "Silicon microchannel plates (Si-MCPs) coated with a layer of nickel cobalt alloy (NCA) constitute an excellent substrate for miniature supercapacitors. Nanoscale Ni(OH)2-Co(OH)2 composite particles serving as the active materials are electrodeposited on ordered three-dimensional (3D) NCA/Ni/Si-MCPs and the Ni(OH)2-Co(OH)2 composites have different structures depending on the amount of Co(OH)2 in Ni(OH)2. The nickel hydroxide synthesized from a water-acetone 0.1 M Ni(NO3)2×6H2O solvent has a compact structure, but that from a 0.1 M Ni(NO3)2×6H 2O solvent containing 5\% Co(NO3)2×6H 2O is loosely packed with nanoparticles and that from a 0.1 M Ni(NO3)2×6H2O solvent containing 10\% Co(NO3)2×6H2O contains many nanoparticles. Addition of Co(NO3)2×6H2O results in a smooth morphology. The smooth structure is also observed from active materials produced in 20\% and 30\% Co(NO3)2× 6H2O solvents. Five types of electrode materials are investigated from the perspective of electrochemical capacitors by conducting cyclic voltammogram, galvanostatic charge-discharge measurements, and electrochemical impedance spectroscopy. In this experiment, the highest specific capacitance of 7.8 F cm-2 is achieved in the samples prepared in 10\% Co(NO 3)2×6H2O at a discharge current density of 20 mA cm-2. It is much better than 1.46 F cm-2 observed from previous attempts and the materials have excellent capacity retention.",

keywords = "Electrochemical capacitors, Electrodeposition, Nanoparticles, Ni-Co alloys, Ordered three-dimensional microchannel plates",

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

year = "2014",

month = mar,

day = "15",

doi = "10.1016/j.jallcom.2013.11.230",

language = "英语",

volume = "589",

pages = "364--371",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Heterostructured Ni(OH)2-Co(OH)2 composites on 3D ordered Ni-Co nanoparticles fabricated on microchannel plates for advanced miniature supercapacitor

AU - Li, Mai

AU - Xu, Shaohui

AU - Zhu, Yiping

AU - Yang, Pingxiong

AU - Wang, Lianwei

AU - Chu, Paul K.

PY - 2014/3/15

Y1 - 2014/3/15

N2 - Silicon microchannel plates (Si-MCPs) coated with a layer of nickel cobalt alloy (NCA) constitute an excellent substrate for miniature supercapacitors. Nanoscale Ni(OH)2-Co(OH)2 composite particles serving as the active materials are electrodeposited on ordered three-dimensional (3D) NCA/Ni/Si-MCPs and the Ni(OH)2-Co(OH)2 composites have different structures depending on the amount of Co(OH)2 in Ni(OH)2. The nickel hydroxide synthesized from a water-acetone 0.1 M Ni(NO3)2×6H2O solvent has a compact structure, but that from a 0.1 M Ni(NO3)2×6H 2O solvent containing 5% Co(NO3)2×6H 2O is loosely packed with nanoparticles and that from a 0.1 M Ni(NO3)2×6H2O solvent containing 10% Co(NO3)2×6H2O contains many nanoparticles. Addition of Co(NO3)2×6H2O results in a smooth morphology. The smooth structure is also observed from active materials produced in 20% and 30% Co(NO3)2× 6H2O solvents. Five types of electrode materials are investigated from the perspective of electrochemical capacitors by conducting cyclic voltammogram, galvanostatic charge-discharge measurements, and electrochemical impedance spectroscopy. In this experiment, the highest specific capacitance of 7.8 F cm-2 is achieved in the samples prepared in 10% Co(NO 3)2×6H2O at a discharge current density of 20 mA cm-2. It is much better than 1.46 F cm-2 observed from previous attempts and the materials have excellent capacity retention.

AB - Silicon microchannel plates (Si-MCPs) coated with a layer of nickel cobalt alloy (NCA) constitute an excellent substrate for miniature supercapacitors. Nanoscale Ni(OH)2-Co(OH)2 composite particles serving as the active materials are electrodeposited on ordered three-dimensional (3D) NCA/Ni/Si-MCPs and the Ni(OH)2-Co(OH)2 composites have different structures depending on the amount of Co(OH)2 in Ni(OH)2. The nickel hydroxide synthesized from a water-acetone 0.1 M Ni(NO3)2×6H2O solvent has a compact structure, but that from a 0.1 M Ni(NO3)2×6H 2O solvent containing 5% Co(NO3)2×6H 2O is loosely packed with nanoparticles and that from a 0.1 M Ni(NO3)2×6H2O solvent containing 10% Co(NO3)2×6H2O contains many nanoparticles. Addition of Co(NO3)2×6H2O results in a smooth morphology. The smooth structure is also observed from active materials produced in 20% and 30% Co(NO3)2× 6H2O solvents. Five types of electrode materials are investigated from the perspective of electrochemical capacitors by conducting cyclic voltammogram, galvanostatic charge-discharge measurements, and electrochemical impedance spectroscopy. In this experiment, the highest specific capacitance of 7.8 F cm-2 is achieved in the samples prepared in 10% Co(NO 3)2×6H2O at a discharge current density of 20 mA cm-2. It is much better than 1.46 F cm-2 observed from previous attempts and the materials have excellent capacity retention.

KW - Electrochemical capacitors

KW - Electrodeposition

KW - Nanoparticles

KW - Ni-Co alloys

KW - Ordered three-dimensional microchannel plates

UR - https://www.scopus.com/pages/publications/84897608090

U2 - 10.1016/j.jallcom.2013.11.230

DO - 10.1016/j.jallcom.2013.11.230

M3 - 文章

AN - SCOPUS:84897608090

SN - 0925-8388

VL - 589

SP - 364

EP - 371

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Heterostructured Ni(OH)₂-Co(OH)₂ composites on 3D ordered Ni-Co nanoparticles fabricated on microchannel plates for advanced miniature supercapacitor

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Keywords

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