A surfactant-free water-processable all-carbon composite and its application to supercapacitor

被引：26

作者：

Du, Wencheng ^{[1
]}

Qi, Shaopeng ^{[1
]}

Zhou, Bo ^{[1
]}

Sun, Peipei ^{[1
]}

Zhu, Lihua ^{[2
]}

Jiang, Xiaoqing ^{[1
]}

机构：

[1] Nanjing Normal Univ, Coll Chem & Mat Sci, Jiangsu Key Lab New Power Batteries, Nanjing 210097, Jiangsu, Peoples R China

[2] Huazhong Univ Sci & Technol, Dept Chem & Chem Engn, Wuhan 430074, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2014年 / 146卷

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

Pristine graphene; Graphene oxide; Composite; Supercapacitor; Water-processable; LIQUID-PHASE EXFOLIATION; NANOTUBE ELECTRODES; ELECTROCHEMICAL CAPACITORS; GRAPHENE NANOSHEETS; GRAPHITE OXIDE; PERFORMANCE; STORAGE; ENERGY; FILMS;

D O I：

10.1016/j.electacta.2014.09.030

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An easy technique is proposed to prepare a new surfactant-free water-processable supercapacitive material composed of graphene oxide (GO) and pristine graphene (PG). GO and PG are prepared by a modified Hummer's method and direct liquid phase exfoliation of graphite in dimethyl sulfoxide (DMSO) respectively. Water-processable GO/PG composites can be conveniently fabricated by mixing colloidal GO/H2O and PG/DMSO dispersions. The GO/PG composites can be re-dispersed in water to form stable colloidal dispersions. Capacitive behaviors of GO, PG and GO/PG composites were tested by cyclic voltammetry, galvanostatic charge/discharge curves and electrochemical impedance spectroscopy in aqueous electrolyte solutions. GO/PG composites exhibited improved capacitive properties in terms of specific capacitance and cycling stability, compared to those of individual components. The enhanced performances of the GO/PG composites signify the importance of the surface chemical property and conductivity of carbon-based materials for supercapacitor applications. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：353 / 358

页数：6

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