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

被引：31

作者：

Qi, Yunhui ^{[1
,2
,3
]}

Liu, Yunfei ^{[1
,2
,3
]}

Zhu, Rui ^{[1
,2
,3
]}

Wang, Qiuliang ^{[1
,2
,3
]}

Luo, Yali ^{[1
,2
,3
]}

Zhu, Chengfei ^{[1
,2
,3
]}

Lyu, Yinong ^{[1
,2
,3
]}

机构：

[1] Nanjing Tech Univ, Coll Mat Sci & Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China

[2] Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, Nanjing, Jiangsu, Peoples R China

[3] Collaborat Innovat Ctr Jiangsu Adv Biol & Chem Mf, Nanjing, Jiangsu, Peoples R China

来源：

NEW JOURNAL OF CHEMISTRY | 2019年 / 43卷 / 07期

关键词：

MICROWAVE-ASSISTED SYNTHESIS; REDUCED GRAPHENE OXIDE; IN-SITU SYNTHESIS; HYDROTHERMAL SYNTHESIS; NANOPOROUS CARBON; FACILE SYNTHESIS; PERFORMANCE; FRAMEWORK; FOAM; NANOSTRUCTURES;

D O I：

10.1039/c8nj04959a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Hexagonal beta-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), similar to 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.

引用

页码：3091 / 3098

页数：8

共 47 条

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