A Hybrid Electrode of CoO@PPy Core/Shell Nanosheet Arrays for High-Performance Supercapacitors

Overview

Journal Nanomicro Lett

Publisher Springer

Date 2018 Nov 22

PMID 30460274

Citations 10

Authors

Xiaojun Yang

Kaibing Xu

Rujia Zou

Junqing Hu

Affiliations

Soon will be listed here.

Abstract

Herein, combining solverthermal route and electrodeposition, we grew unique hybrid nanosheet arrays consisting of CoO nanosheet as a core, PPy as a shell. Benefiting from the PPy as conducting polymer improving an electron transport rate as well as synergistic effects from such a core/shell structure, a hybrid electrode made of the CoO@PPy core/shell nanosheet arrays exhibits a large areal capacitance of 2.11 F cm at the current density of 2 mA cm, a ~4-fold enhancement compared with the pristine CoO electrode; furthermore, this hybrid electrode also displays good rate capability (~65 % retention of the initial capacitance from 2 to 20 mA cm) and superior cycling performance (~85.5 % capacitance retention after 5000 cycles). In addition, the equivalent series resistance value of the CoO@PPy hybrid electrode (0.238 Ω) is significantly lower than that of the pristine CoO electrode (0.319 Ω). These results imply that the CoO@PPy hybrid composites have a potential for fabricating next-generation energy storage and conversion devices.

Citing Articles

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