Rapid synthesis of Ni(OH)2/graphene nanosheets and NiO@Ni(OH)2/graphene nanosheets for supercapacitor applications

Yunhui Qi; Yunfei Liu; Rui Zhu; Qiuliang Wang; Yali Luo; Chengfei Zhu; Yinong Lyu

doi:10.1039/c8nj04959a

Rapid synthesis of Ni(OH)₂/graphene nanosheets and NiO@Ni(OH)₂/graphene nanosheets for supercapacitor applications

Yunhui Qi, Yunfei Liu, Rui Zhu, Qiuliang Wang, Yali Luo, Chengfei Zhu, Yinong Lyu

College of Materials Science and Engineering

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

32 Scopus citations

Abstract

Hexagonal β-Ni(OH)₂ nanoplates grown on commercial graphene nanosheets (GNSs) were successfully prepared through a fast and facile microwave hydrothermal method. The GNSs/NiO@Ni(OH)₂ composite was obtained via an additional treatment, due to which NiO separated out from the hexagonal nanoplates. A possible formation mechanism of these composites was put forward based on their morphology and microstructure. The GNSs/Ni(OH)₂ composite exhibited high specific capacitance of 1172 F g⁻¹ at a scan rate of 5 mV s⁻¹ and showed specific capacitance of 1042 F g⁻¹ at a discharge current density of 3 A g⁻¹, whereas the GNSs/NiO@Ni(OH)₂ composite showed higher rate capability (684 F g⁻¹ at a discharge current density of 24 A g⁻¹, ∼92% capacitance retention at 3 A g⁻¹). GNSs/Ni(OH)₂ anodes after the first charge-discharge cycle were characterized by TEM. Besides, both the composites delivered high energy density and high power density, due to which they are promising materials for high-performance supercapacitors.

Original language	English
Pages (from-to)	3091-3098
Number of pages	8
Journal	New Journal of Chemistry
Volume	43
Issue number	7
DOIs	https://doi.org/10.1039/c8nj04959a
State	Published - 2019

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@article{b9b25f9666154364a3bb3b18cea3a1e5,

title = "Rapid synthesis of Ni(OH)2/graphene nanosheets and NiO@Ni(OH)2/graphene nanosheets for supercapacitor applications",

abstract = "Hexagonal β-Ni(OH)2 nanoplates grown on commercial graphene nanosheets (GNSs) were successfully prepared through a fast and facile microwave hydrothermal method. The GNSs/NiO@Ni(OH)2 composite was obtained via an additional treatment, due to which NiO separated out from the hexagonal nanoplates. A possible formation mechanism of these composites was put forward based on their morphology and microstructure. The GNSs/Ni(OH)2 composite exhibited high specific capacitance of 1172 F g−1 at a scan rate of 5 mV s−1 and showed specific capacitance of 1042 F g−1 at a discharge current density of 3 A g−1, whereas the GNSs/NiO@Ni(OH)2 composite showed higher rate capability (684 F g−1 at a discharge current density of 24 A g−1, ∼92% capacitance retention at 3 A g−1). GNSs/Ni(OH)2 anodes after the first charge-discharge cycle were characterized by TEM. Besides, both the composites delivered high energy density and high power density, due to which they are promising materials for high-performance supercapacitors.",

author = "Yunhui Qi and Yunfei Liu and Rui Zhu and Qiuliang Wang and Yali Luo and Chengfei Zhu and Yinong Lyu",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.",

year = "2019",

doi = "10.1039/c8nj04959a",

language = "英语",

volume = "43",

pages = "3091--3098",

journal = "New Journal of Chemistry",

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TY - JOUR

T1 - Rapid synthesis of Ni(OH)2/graphene nanosheets and NiO@Ni(OH)2/graphene nanosheets for supercapacitor applications

AU - Qi, Yunhui

AU - Liu, Yunfei

AU - Zhu, Rui

AU - Wang, Qiuliang

AU - Luo, Yali

AU - Zhu, Chengfei

AU - Lyu, Yinong

PY - 2019

Y1 - 2019

N2 - Hexagonal β-Ni(OH)2 nanoplates grown on commercial graphene nanosheets (GNSs) were successfully prepared through a fast and facile microwave hydrothermal method. The GNSs/NiO@Ni(OH)2 composite was obtained via an additional treatment, due to which NiO separated out from the hexagonal nanoplates. A possible formation mechanism of these composites was put forward based on their morphology and microstructure. The GNSs/Ni(OH)2 composite exhibited high specific capacitance of 1172 F g−1 at a scan rate of 5 mV s−1 and showed specific capacitance of 1042 F g−1 at a discharge current density of 3 A g−1, whereas the GNSs/NiO@Ni(OH)2 composite showed higher rate capability (684 F g−1 at a discharge current density of 24 A g−1, ∼92% capacitance retention at 3 A g−1). GNSs/Ni(OH)2 anodes after the first charge-discharge cycle were characterized by TEM. Besides, both the composites delivered high energy density and high power density, due to which they are promising materials for high-performance supercapacitors.

AB - Hexagonal β-Ni(OH)2 nanoplates grown on commercial graphene nanosheets (GNSs) were successfully prepared through a fast and facile microwave hydrothermal method. The GNSs/NiO@Ni(OH)2 composite was obtained via an additional treatment, due to which NiO separated out from the hexagonal nanoplates. A possible formation mechanism of these composites was put forward based on their morphology and microstructure. The GNSs/Ni(OH)2 composite exhibited high specific capacitance of 1172 F g−1 at a scan rate of 5 mV s−1 and showed specific capacitance of 1042 F g−1 at a discharge current density of 3 A g−1, whereas the GNSs/NiO@Ni(OH)2 composite showed higher rate capability (684 F g−1 at a discharge current density of 24 A g−1, ∼92% capacitance retention at 3 A g−1). GNSs/Ni(OH)2 anodes after the first charge-discharge cycle were characterized by TEM. Besides, both the composites delivered high energy density and high power density, due to which they are promising materials for high-performance supercapacitors.

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U2 - 10.1039/c8nj04959a

DO - 10.1039/c8nj04959a

M3 - 文章

AN - SCOPUS:85061405629

SN - 1144-0546

VL - 43

SP - 3091

EP - 3098

JO - New Journal of Chemistry

JF - New Journal of Chemistry

IS - 7

ER -

Rapid synthesis of Ni(OH)₂/graphene nanosheets and NiO@Ni(OH)₂/graphene nanosheets for supercapacitor applications

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