Functionalized graphene foam as electrode for improved electrochemical storage

被引：16

作者：

Bello, A. ^{[1
]}

Fabiane, M. ^{[1
]}

Momodu, D. Y. ^{[1
]}

Khamlich, S. ^{[1
]}

Dangbegnon, J. K. ^{[1
]}

Manyala, N. ^{[1
]}

机构：

[1] Univ Pretoria, Inst Appl Mat, Dept Phys, SARChI Chair Carbon Technol & Mat, ZA-0028 Pretoria, South Africa

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2014年 / 18卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

Graphene foam (GF); Pyrene carboxylic acid (PCA); Chemical vapour deposition (CVD); Supercapacitor; CHEMICAL-VAPOR-DEPOSITION; AROMATIC-MOLECULES; GRAPHITE OXIDE; FILMS; SUPERCAPACITOR; COMPOSITES; SHEETS; ENERGY; PERFORMANCE; DENSITY;

D O I：

10.1007/s10008-014-2473-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report on a non-covalent functionalization of graphene foam (GF) synthesized via chemical vapour deposition (CVD). The GF was treated with pyrene carboxylic acid (PCA) which acted as a source of oxygen and/or hydroxyl groups attached to the surface of the graphene foam for its electrochemical performance improvement. The modified graphene surface enabled a high pseudocapacitive effect on the GF. A specific capacitance of 133.3 F g(-1), power density similar to 145.3 kW kg(-1) and energy density similar to 4.7 W h kg(-1) were achieved based on the functionalized foam in 6 M KOH aqueous electrolyte. The results suggest that non-covalent functionalization might be an effective approach to overcome the restacking problem associated with graphene electrodes and also signify the importance of surface functionalities in graphene-based electrode materials.

引用

页码：2359 / 2365

页数：7

共 49 条

[1] Stable Aqueous Dispersions of Noncovalently Functionalized Graphene from Graphite and their Multifunctional High-Performance Applications [J].