High-performance hybrid capacitor based on a porous polypyrrole/reduced graphene oxide composite and a redox-active electrolyte

被引：52

作者：

Moyseowicz, Adam ^{[1
]}

Gryglewicz, Grazyna ^{[1
]}

机构：

[1] Wroclaw Univ Sci & Technol, Fac Chem, Dept Proc Engn & Technol Polymer & Carbon Mat, Gdanska 7-9, PL-50344 Wroclaw, Poland

来源：

ELECTROCHIMICA ACTA | 2020年 / 354卷

关键词：

Hybrid capacitor; Hydroquinone; Energy storage; Hydrothermal treatment; Polymer-graphene composite; HYDROTHERMAL-ASSISTED SYNTHESIS; ENERGY-STORAGE; CARBON; SUPERCAPACITORS; HYDROQUINONE; NANOCOMPOSITES; BATTERY; ENHANCEMENT; NANOFIBERS; NANOSHEETS;

D O I：

10.1016/j.electacta.2020.136661

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Aqueous redox-active electrolytes can provide a significant improvement in electric energy storage for electrochemical capacitors. Herein, we report a novel hybrid capacitor consisting of porous polypyrrole/ reduced graphene oxide (PPy/rGO-HT) composite electrodes and an aqueous electrolyte with hydroquinone redox-active species. A hydrothermal-assisted synthesis of the PPy/rGO-HT composite allowed to obtain a porous polymer-graphene composite with a high specific surface area of 597 m(2) g(-1). In a three-electrode configuration with the redox-active electrolyte, PPy/rGO-HT exhibits better electrochemical performance in terms of specific capacity and cycling stability compared with that of pristine rGO. An assembled symmetric device achieves excellent long-term stability and a specific energy of 6.5 Wh kg(-1), indicating the potential of hybrid systems for energy storage applications. (C) 2020 The Authors. Published by Elsevier Ltd.

引用

页数：10

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