Hybrid Co(OH)2/nano-graphene/Ni nano-composites on silicon microchannel plates for miniature supercapacitors

Cheng Liang; Leilei Chen; Dajun Wu; Chi Zhang; Shaohui Xu; Yiping Zhu; Dayuan Xiong; Pingxiong Yang; Lianwei Wang; Paul K. Chu

doi:10.1016/j.matlet.2016.02.132

Hybrid Co(OH)₂/nano-graphene/Ni nano-composites on silicon microchannel plates for miniature supercapacitors

Cheng Liang
, Leilei Chen
, Dajun Wu
, Chi Zhang
, Shaohui Xu
, Yiping Zhu
, Dayuan Xiong
, 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

16 Citations (Scopus)

Abstract

Nano-scale Co(OH)₂/NG (nano-graphene: NG) composites serving as the active materials of miniature supercapacitors are deposited on macroporous electrically conductive network (MECN). The Co(OH)₂/NG composite in the channels largely contribute to the capacitance. The electrochemical properties are investigated by cyclic voltammetry (CV), galvanostatic charging-discharging, and electrochemical impedance spectroscopy (EIS) in a 2 M KOH solution. The Co(OH)₂/NG composite exhibits a stable capacitance of 3.522 F/cm² (880.5 F/g) and retention ratio is 99% after 5000 cycles demonstrating the stability and durability. The Co(OH)₂/NG/MECN can be scanned faster than Co(OH)₂/MECN in CV because of the higher conductivity.

Original language	English
Pages (from-to)	40-43
Journal	Materials Letters
Volume	172
Online published	26 Feb 2016
DOIs	https://doi.org/10.1016/j.matlet.2016.02.132
Publication status	Published - 1 Jun 2016

Research Keywords

Carbon materials
Co(OH)2
Composite materials
Deposition
MECN
Supercapacitor

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Cite this

@article{e49775ce5bf8423eba95b5a29f053fc7,

title = "Hybrid Co(OH)2/nano-graphene/Ni nano-composites on silicon microchannel plates for miniature supercapacitors",

abstract = "Nano-scale Co(OH)2/NG (nano-graphene: NG) composites serving as the active materials of miniature supercapacitors are deposited on macroporous electrically conductive network (MECN). The Co(OH)2/NG composite in the channels largely contribute to the capacitance. The electrochemical properties are investigated by cyclic voltammetry (CV), galvanostatic charging-discharging, and electrochemical impedance spectroscopy (EIS) in a 2 M KOH solution. The Co(OH)2/NG composite exhibits a stable capacitance of 3.522 F/cm2 (880.5 F/g) and retention ratio is 99\% after 5000 cycles demonstrating the stability and durability. The Co(OH)2/NG/MECN can be scanned faster than Co(OH)2/MECN in CV because of the higher conductivity.",

keywords = "Carbon materials, Co(OH)2, Composite materials, Deposition, MECN, Supercapacitor",

author = "Cheng Liang and Leilei Chen and Dajun Wu and Chi Zhang and Shaohui Xu and Yiping Zhu and Dayuan Xiong and Pingxiong Yang and Lianwei Wang and Chu, \{Paul K.\}",

year = "2016",

month = jun,

day = "1",

doi = "10.1016/j.matlet.2016.02.132",

language = "English",

volume = "172",

pages = "40--43",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Hybrid Co(OH)2/nano-graphene/Ni nano-composites on silicon microchannel plates for miniature supercapacitors

AU - Liang, Cheng

AU - Chen, Leilei

AU - Wu, Dajun

AU - Zhang, Chi

AU - Xu, Shaohui

AU - Zhu, Yiping

AU - Xiong, Dayuan

AU - Yang, Pingxiong

AU - Wang, Lianwei

AU - Chu, Paul K.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - Nano-scale Co(OH)2/NG (nano-graphene: NG) composites serving as the active materials of miniature supercapacitors are deposited on macroporous electrically conductive network (MECN). The Co(OH)2/NG composite in the channels largely contribute to the capacitance. The electrochemical properties are investigated by cyclic voltammetry (CV), galvanostatic charging-discharging, and electrochemical impedance spectroscopy (EIS) in a 2 M KOH solution. The Co(OH)2/NG composite exhibits a stable capacitance of 3.522 F/cm2 (880.5 F/g) and retention ratio is 99% after 5000 cycles demonstrating the stability and durability. The Co(OH)2/NG/MECN can be scanned faster than Co(OH)2/MECN in CV because of the higher conductivity.

AB - Nano-scale Co(OH)2/NG (nano-graphene: NG) composites serving as the active materials of miniature supercapacitors are deposited on macroporous electrically conductive network (MECN). The Co(OH)2/NG composite in the channels largely contribute to the capacitance. The electrochemical properties are investigated by cyclic voltammetry (CV), galvanostatic charging-discharging, and electrochemical impedance spectroscopy (EIS) in a 2 M KOH solution. The Co(OH)2/NG composite exhibits a stable capacitance of 3.522 F/cm2 (880.5 F/g) and retention ratio is 99% after 5000 cycles demonstrating the stability and durability. The Co(OH)2/NG/MECN can be scanned faster than Co(OH)2/MECN in CV because of the higher conductivity.

KW - Carbon materials

KW - Co(OH)2

KW - Composite materials

KW - Deposition

KW - MECN

KW - Supercapacitor

UR - https://www.scopus.com/pages/publications/84960902144

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84960902144&origin=recordpage

U2 - 10.1016/j.matlet.2016.02.132

DO - 10.1016/j.matlet.2016.02.132

M3 - RGC 21 - Publication in refereed journal

SN - 0167-577X

VL - 172

SP - 40

EP - 43

JO - Materials Letters

JF - Materials Letters

ER -