Preparation of Highly Conductive Graphene Hydrogels for Fabricating Supercapacitors with High Rate Capability

被引：697

作者：

Zhang, Li ^{[1
]}

Shi, Gaoquan ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 34期

基金：

中国博士后科学基金;

关键词：

FUNCTIONALIZED GRAPHENE; ELECTROCHEMICAL CAPACITORS; GRAPHITE OXIDE; FILMS; EXFOLIATION; PERFORMANCE; REDUCTION; NANOSHEETS; NANOTUBES; NITROGEN;

D O I：

10.1021/jp204036a

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：

Graphene hydrogels prepared via hydrothermal reduction of graphene oxide dispersions (GH-Hs) were further reduced with hydrazine (Hz) or hydroiodic acid (HI) to improve their conductivities. The chemically reduced graphene hydrogels possess high conductivities of 1.3-3.2 S m(-1), which are 1 order of magnitude higher than that of a GH-H (0.3 S m(-1)). The supercapacitor based on the Hz-reduced GH-H exhibited a high specific capacitance of 220 F g(-1) at 1 A g(-1), and this capacitance can be maintained for 74% as the discharging current density was increased up to 100 A g(-1). Furthermore, it showed high power density and long cycle life. The high-performances of this supercapacitor make it promising for high rate charge/discharge applications.

引用

页码：17206 / 17212

页数：7

共 40 条

[31] Self-Assembled Graphene Hydrogel via a One-Step Hydrothermal Process [J].

Xu, Yuxi ;

Sheng, Kaixuan ;

Li, Chun ;

Shi, Gaoquan .

ACS NANO, 2010, 4 (07) :4324-4330

[32] Chemically Converted Graphene Induced Molecular Flattening of 5,10,15,20-Tetrakis(1-methyl-4-pyridinio)porphyrin and Its Application for Optical Detection of Cadmium(II) Ions [J].

Xu, Yuxi ;

Zhao, Lu ;

Bai, Hua ;

Hong, Wenjing ;

Li, Chun ;

Shi, Gaoquan .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (37) :13490-13497

[33] Design and tailoring of a hierarchical graphene-carbon nanotube architecture for supercapacitors [J].

Yang, Shin-Yi ;

Chang, Kuo-Hsin ;

Tien, Hsi-Wen ;

Lee, Ying-Feng ;

Li, Shin-Ming ;

Wang, Yu-Sheng ;

Wang, Jen-Yu ;

Ma, Chen-Chi M. ;

Hu, Chi-Chang .

JOURNAL OF MATERIALS CHEMISTRY, 2011, 21 (07) :2374-2380

[34] Bioinspired Effective Prevention of Restacking in Multilayered Graphene Films: Towards the Next Generation of High-Performance Supercapacitors [J].

Yang, Xiaowei ;

Zhu, Junwu ;

Qiu, Ling ;

Li, Dan .

ADVANCED MATERIALS, 2011, 23 (25) :2833-+

[35] Electrical properties of electrical double layer capacitors with integrated carbon nanotube electrodes [J].

Yoon, BJ ;

Jeong, SH ;

Lee, KH ;

Kim, HS ;

Park, CG ;

Han, JH .

CHEMICAL PHYSICS LETTERS, 2004, 388 (1-3) :170-174

[36] Graphene-based materials as supercapacitor electrodes [J].

Zhang, Li Li ;

Zhou, Rui ;

Zhao, X. S. .

JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (29) :5983-5992

[37] Carbon-Based Supercapacitors Produced by Activation of Graphene [J].

Zhu, Yanwu ;

Murali, Shanthi ;

Stoller, Meryl D. ;

Ganesh, K. J. ;

Cai, Weiwei ;

Ferreira, Paulo J. ;

Pirkle, Adam ;

Wallace, Robert M. ;

Cychosz, Katie A. ;

Thommes, Matthias ;

Su, Dong ;

Stach, Eric A. ;

Ruoff, Rodney S. .

SCIENCE, 2011, 332 (6037) :1537-1541

[38] Graphene and Graphene Oxide: Synthesis, Properties, and Applications [J].

Zhu, Yanwu ;

Murali, Shanthi ;

Cai, Weiwei ;

Li, Xuesong ;

Suk, Ji Won ;

Potts, Jeffrey R. ;

Ruoff, Rodney S. .

ADVANCED MATERIALS, 2010, 22 (35) :3906-3924

[39] Microwave assisted exfoliation and reduction of graphite oxide for ultracapacitors [J].

Zhu, Yanwu ;

Murali, Shanthi ;

Stoller, Meryl D. ;

Velamakanni, Aruna ;

Piner, Richard D. ;

Ruoff, Rodney S. .

CARBON, 2010, 48 (07) :2118-2122

[40] Exfoliation of Graphite Oxide in Propylene Carbonate and Thermal Reduction of the Resulting Graphene Oxide Platelets [J].

Zhu, Yanwu ;

Stoller, Meryl D. ;

Cai, Weiwei ;

Velamakanni, Aruna ;

Piner, Richard D. ;

Chen, David ;

Ruoff, Rodney S. .

ACS NANO, 2010, 4 (02) :1227-1233

← 1 2 3 4 →