Graphene Nanosheet/Ni2+/Al3+ Layered Double-Hydroxide Composite as a Novel Electrode for a Supercapacitor

被引：509

作者：

Gao, Zan ^{[1
]}

Wang, Jun ^{[1
,2
]}

Li, Zhanshuang ^{[1
]}

Yang, Wanlu ^{[1
]}

Wang, Bin ^{[1
]}

Hou, Mengjie ^{[1
]}

He, Yang ^{[1
]}

Liu, Qi ^{[1
]}

Mann, Tom ^{[1
]}

Yang, Piaoping ^{[1
,2
]}

Zhang, Milin ^{[1
,2
]}

Liu, Lianhe ^{[1
,2
]}

机构：

[1] Harbin Engn Univ, Minist Educ, Key Lab Supertight Mat & Surface Technol, Harbin 150001, Peoples R China

[2] Harbin Engn Univ, Inst Adv Marine Mat, Harbin 150001, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2011年 / 23卷 / 15期

关键词：

graphene nanosheet; layered double hydroxides; composite electrode; supercapacitor; EXFOLIATED GRAPHITE OXIDE; ELECTROCHEMICAL CAPACITORS; CARBON; PERFORMANCE; FILMS; POLYANILINE; NANOSHEETS; IONS; ULTRACAPACITORS; NANOPARTICLES;

D O I：

10.1021/cm200975x

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A hybrid chemically converted graphene nanosheet/Ni2+/Al3+ layered double-hydroxide (GNS/LDH) composite for supercapacitor material has been fabricated by a hydrothermal method. Scanning electron microscopy and transmission electron microscopy results reveal that Ni2+/Al3+ LDH platelets homogeneously grew onto the surfaces of the GNSs as spacers to keep the neighboring sheets separate. Electrochemical properties were characterized by cyclic voltammetry, galvanostatic charge/discharge measurements, and electrochemical impedance spectroscopy. The composite exhibits a maximum specific capacitance of 781.5 F/g and excellent cycle life with an increase of the specific capacitance of 38.07% after 50 cycle tests. Even after 200 cycle tests, the increase of the capacitance is 22.56% compared with the initial capacitance.

引用

页码：3509 / 3516

页数：8

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