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A Hybrid Electrode of Co3O4@PPy Core/Shell Nanosheet Arrays for High-Performance Supercapacitors.


ABSTRACT: Herein, combining solverthermal route and electrodeposition, we grew unique hybrid nanosheet arrays consisting of Co3O4 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 Co3O4@PPy core/shell nanosheet arrays exhibits a large areal capacitance of 2.11 F cm-2 at the current density of 2 mA cm-2, a ~4-fold enhancement compared with the pristine Co3O4 electrode; furthermore, this hybrid electrode also displays good rate capability (~65 % retention of the initial capacitance from 2 to 20 mA cm-2) and superior cycling performance (~85.5 % capacitance retention after 5000 cycles). In addition, the equivalent series resistance value of the Co3O4@PPy hybrid electrode (0.238 ?) is significantly lower than that of the pristine Co3O4 electrode (0.319 ?). These results imply that the Co3O4@PPy hybrid composites have a potential for fabricating next-generation energy storage and conversion devices.

SUBMITTER: Yang X 

PROVIDER: S-EPMC6223670 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature

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A Hybrid Electrode of Co<sub>3</sub>O<sub>4</sub>@PPy Core/Shell Nanosheet Arrays for High-Performance Supercapacitors.

Yang Xiaojun X   Xu Kaibing K   Zou Rujia R   Hu Junqing J  

Nano-micro letters 20151015 2


Herein, combining solverthermal route and electrodeposition, we grew unique hybrid nanosheet arrays consisting of Co<sub>3</sub>O<sub>4</sub> 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 Co<sub>3</sub>O<sub>4</sub>@PPy core/shell nanosheet arrays exhibits a large areal capacitance of 2.11 F cm<sup>-2</sup> at the current densit  ...[more]

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