Preparation of Ni(OH)2-graphene sheet-carbon nanotube composite as electrode material for supercapacitors

Y. F. Liu; G. H. Yuan; Z. H. Jiang; Z. P. Yao; M. Yue

doi:10.1016/j.jallcom.2014.08.167

Preparation of Ni(OH)₂-graphene sheet-carbon nanotube composite as electrode material for supercapacitors

Y. F. Liu
, G. H. Yuan^*
, Z. H. Jiang
, Z. P. Yao
, M. Yue

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology
Heilongjiang University of Science and Technology
Shenzhen BTR New Energy Materials INC.

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

49 Scopus citations

Abstract

Ni(OH)₂-graphene sheet-carbon nanotube composite was prepared for supercapacitance materials through a simple two-step process involving solvothermal synthesis of graphene sheet-carbon nanotube composite in ethanol and chemical precipitation of Ni(OH)₂. According to N₂adsorption/desorption analysis, the Brunauer-Emmett-Teller surface area of graphene sheet-carbon nanotube composite (109.07 m²g^-1) was larger than that of pure graphene sheets (32.06 m²g^-1), indicating that the added carbon nanotubes (15 wt.%) could prevent graphene sheets from restacking in the solvothermal reaction. The results of field emission scanning electron microscopy and transmission electron microscopy showed that Ni(OH)₂nanosheets were uniformly loaded into the three-dimensional interconnected network of graphene sheet-carbon nanotube composite. The microstructure enhanced the rate capability and utilization of Ni(OH)₂. The specific capacitance of Ni(OH)₂-graphene sheet-carbon nanotube composite was 1170.38 F g^-1at a current density of 0.2 A g^-1in the 6 mol L^-1KOH solution, higher than those provided by pure Ni(OH)₂(953.67 Fg^-1) and graphene sheets (178.25 F g^-1). After 20 cycles at each current density (0.2, 0.4, 0.6, 0.8, 1.0 and 1.2 A g^-1), the capacitance of Ni(OH)₂-graphene sheet-carbon nanotube composite decreased 26.96% of initial capacitance compared to 74.52% for pure Ni(OH)₂.

Original language	English
Pages (from-to)	37-43
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	618
DOIs	https://doi.org/10.1016/j.jallcom.2014.08.167
State	Published - 5 Jan 2015
Externally published	Yes

Keywords

Carbon nanotube
Graphene sheets
Ni(OH)
Solvothermal reaction
Supercapacitor

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10.1016/j.jallcom.2014.08.167

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title = "Preparation of Ni(OH)2-graphene sheet-carbon nanotube composite as electrode material for supercapacitors",

abstract = "Ni(OH)2-graphene sheet-carbon nanotube composite was prepared for supercapacitance materials through a simple two-step process involving solvothermal synthesis of graphene sheet-carbon nanotube composite in ethanol and chemical precipitation of Ni(OH)2. According to N2adsorption/desorption analysis, the Brunauer-Emmett-Teller surface area of graphene sheet-carbon nanotube composite (109.07 m2g-1) was larger than that of pure graphene sheets (32.06 m2g-1), indicating that the added carbon nanotubes (15 wt.\%) could prevent graphene sheets from restacking in the solvothermal reaction. The results of field emission scanning electron microscopy and transmission electron microscopy showed that Ni(OH)2nanosheets were uniformly loaded into the three-dimensional interconnected network of graphene sheet-carbon nanotube composite. The microstructure enhanced the rate capability and utilization of Ni(OH)2. The specific capacitance of Ni(OH)2-graphene sheet-carbon nanotube composite was 1170.38 F g-1at a current density of 0.2 A g-1in the 6 mol L-1KOH solution, higher than those provided by pure Ni(OH)2(953.67 Fg-1) and graphene sheets (178.25 F g-1). After 20 cycles at each current density (0.2, 0.4, 0.6, 0.8, 1.0 and 1.2 A g-1), the capacitance of Ni(OH)2-graphene sheet-carbon nanotube composite decreased 26.96\% of initial capacitance compared to 74.52\% for pure Ni(OH)2.",

keywords = "Carbon nanotube, Graphene sheets, Ni(OH), Solvothermal reaction, Supercapacitor",

author = "Liu, \{Y. F.\} and Yuan, \{G. H.\} and Jiang, \{Z. H.\} and Yao, \{Z. P.\} and M. Yue",

year = "2015",

month = jan,

day = "5",

doi = "10.1016/j.jallcom.2014.08.167",

language = "英语",

volume = "618",

pages = "37--43",

journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Preparation of Ni(OH)2-graphene sheet-carbon nanotube composite as electrode material for supercapacitors

AU - Liu, Y. F.

AU - Yuan, G. H.

AU - Jiang, Z. H.

AU - Yao, Z. P.

AU - Yue, M.

PY - 2015/1/5

Y1 - 2015/1/5

N2 - Ni(OH)2-graphene sheet-carbon nanotube composite was prepared for supercapacitance materials through a simple two-step process involving solvothermal synthesis of graphene sheet-carbon nanotube composite in ethanol and chemical precipitation of Ni(OH)2. According to N2adsorption/desorption analysis, the Brunauer-Emmett-Teller surface area of graphene sheet-carbon nanotube composite (109.07 m2g-1) was larger than that of pure graphene sheets (32.06 m2g-1), indicating that the added carbon nanotubes (15 wt.%) could prevent graphene sheets from restacking in the solvothermal reaction. The results of field emission scanning electron microscopy and transmission electron microscopy showed that Ni(OH)2nanosheets were uniformly loaded into the three-dimensional interconnected network of graphene sheet-carbon nanotube composite. The microstructure enhanced the rate capability and utilization of Ni(OH)2. The specific capacitance of Ni(OH)2-graphene sheet-carbon nanotube composite was 1170.38 F g-1at a current density of 0.2 A g-1in the 6 mol L-1KOH solution, higher than those provided by pure Ni(OH)2(953.67 Fg-1) and graphene sheets (178.25 F g-1). After 20 cycles at each current density (0.2, 0.4, 0.6, 0.8, 1.0 and 1.2 A g-1), the capacitance of Ni(OH)2-graphene sheet-carbon nanotube composite decreased 26.96% of initial capacitance compared to 74.52% for pure Ni(OH)2.

AB - Ni(OH)2-graphene sheet-carbon nanotube composite was prepared for supercapacitance materials through a simple two-step process involving solvothermal synthesis of graphene sheet-carbon nanotube composite in ethanol and chemical precipitation of Ni(OH)2. According to N2adsorption/desorption analysis, the Brunauer-Emmett-Teller surface area of graphene sheet-carbon nanotube composite (109.07 m2g-1) was larger than that of pure graphene sheets (32.06 m2g-1), indicating that the added carbon nanotubes (15 wt.%) could prevent graphene sheets from restacking in the solvothermal reaction. The results of field emission scanning electron microscopy and transmission electron microscopy showed that Ni(OH)2nanosheets were uniformly loaded into the three-dimensional interconnected network of graphene sheet-carbon nanotube composite. The microstructure enhanced the rate capability and utilization of Ni(OH)2. The specific capacitance of Ni(OH)2-graphene sheet-carbon nanotube composite was 1170.38 F g-1at a current density of 0.2 A g-1in the 6 mol L-1KOH solution, higher than those provided by pure Ni(OH)2(953.67 Fg-1) and graphene sheets (178.25 F g-1). After 20 cycles at each current density (0.2, 0.4, 0.6, 0.8, 1.0 and 1.2 A g-1), the capacitance of Ni(OH)2-graphene sheet-carbon nanotube composite decreased 26.96% of initial capacitance compared to 74.52% for pure Ni(OH)2.

KW - Carbon nanotube

KW - Graphene sheets

KW - Ni(OH)

KW - Solvothermal reaction

KW - Supercapacitor

UR - https://www.scopus.com/pages/publications/84907079111

U2 - 10.1016/j.jallcom.2014.08.167

DO - 10.1016/j.jallcom.2014.08.167

M3 - 文章

AN - SCOPUS:84907079111

SN - 0925-8388

VL - 618

SP - 37

EP - 43

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Preparation of Ni(OH)₂-graphene sheet-carbon nanotube composite as electrode material for supercapacitors

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Keywords

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